Monty Python Grail Video Essay Example | Topics and Well Written Essays - 250 words

Monty Python Grail Video - Essay Example The Monty Python Grail Government video casts an interesting light on several of the topics we have discussed in this class. Two of the most prominent is relativism and the role of religion in government. Relativism, in general, is the idea that there is no one objective truth, but that everything is relative to the speaker’s viewpoint. In other words, our perceptions of what goes on around us make us see things differently to how others perceive them. This is seen in the video through the way King Arthur and the peasant interpret things so differently, from his right to rule down to how people should be treated. They also clearly have different ideas about what Arthur is doing on his quest. The role of religion in government has a lot to do with relativism. Although some would consider this role to be vital, and the only way for a government to be legitimate, others would not. In the video, for example, King Arthur explains how he became king by getting Excalibur from the lady of the lake, and how this makes him the true king of the country. The peasants, on the other hand, think this is ridiculous. Although the lady of the lake is not religious as such, she makes a good example of the arguments against religious rule. For instance, the male peasant talks about how, instead of â€Å"farcical aquatic ceremonies,† the real right to power should come from the people of a country. This would suggest that the only way to be really a legitimate ruler or government would not be religious, but popular support.

My Name Edwin Essay Example | Topics and Well Written Essays - 1500 words

My Name Edwin - Essay Example The reason these relationships are no longer recognized is that, in many cases, the language in which the name originated falls out of use. Most of these names originated as descriptive terms of the person who bore them. These were typically collections of nouns and adjectives such as ‘Wulfgar’, which includes the still recognizable word ‘wolf’ combined with a once recognized word ‘gar’ which referred to a specific type of weapon. â€Å"Parents would choose names from the pool of existing names rather than invent new ones for their children. As time went on the language changed and in many cases the words that formed the original name passed out of use, leaving the fossilized form in the name. This is why we do not recognize the meanings of many names today† (Elliott, 1997). The name ‘Edwin’ is one of these names with an ancient history and meaning despite its relatively recent revival in modern use. According to the â€Å"Etymology of First Names† (2002), the name ‘Edwin’ is comprised of two Old English words ‘ead’ and ‘wine’ or sometimes ‘wyne’, which mean â€Å"rich or blessed† and â€Å"friend† respectively. Elliott (1997) disagrees slightly and defines ‘ead’ as meaning â€Å"prosperity, fortune, riches.† Thus, the name is translated to mean â€Å"rich friend†, â€Å"blessed friend† or â€Å"friend to prosperity† depending upon the translator’s conception of the word ‘ead.’ The name is considered a traditional name in German, Dutch, and English, but is generally agreed to have originated in Germany. Part of the reason for this is its connection with Old English. However, the name had to have once enjoyed a great deal of popularity as it eventually became the foundation for a particular surname depicting the reach it eventually gained. Evidence that the name was widespread exists in the appearance of the surname Edevane in Wales.â€Å"This surname is so rare as not to appear in the

International Marketing Essay Example | Topics and Well Written Essays - 1000 words - 1

International Marketing - Essay Example Another benefit of a quality outsourced customer care is the ability to provide flexibility. Outsourcing offers most companies an opportunity to diversify when they decide to break down most of their operations and having both internal and external ways to operate. Q. 2. The main advantages of licensing as a market entry strategy according to Cateora, Gilly and Graham (2011) include: provision of supplementary profitability with an early diminutive investment, brand recognition, provision of a way of circumnavigating extra charges, attractive return-on-investment rates and finally low implementation costs. The main disadvantages of licensing include: competition, inadequate participation resulting to lack of control and the likelihood of loss in returns. Examples of companies that use licensing as their market entry strategy include Disney Consumer Products and Phillips-Van Heusen. Q. 3. According to Keegan (2002), global strategic partnership involves participants who remain autonom ous after formation of the association, share profits of the association as well as control over performance of assigned responsibilities and lastly the participants involve in making continued contributions in products, expertise and other key strategic areas. Global strategic partnerships differ from joint venture since entry strategy for a joint venture involves a single target country whereby associates end up dividing the ownership of a newly created business entity. Global strategic partnerships involve collaborative agreements with more than one target country. Part 2 Marketing Plan Atek’s mission is to base everything that they do on quality that cannot be surpassed in the industry, manufacture complex medical devices, launch new products with expertise and providing experiences and resources that contain value. This is achieved with one goal in mind, which is to improve in the core areas important to consumers. The main marketing objectives for Atek are: to help impr ove the speed of speed-to-market, product performance, and profitability in an atmosphere of high quality. This is achieved by launching millions of devices in the market that are aimed at satisfying each consumer’s specific needs so as to optimize the manufacturing process. The objectives are also accomplished by providing support that meets the consumers’ requirements. Atek’s short term plan is to be the premier manufacturer and distributor in their market country which is the U.S. According to Wind & Douglas (1974), it would be relatively easier to market a new product to a target audience in the U.S relatively than in other diversified locales if the manufacturing company is U.S. based. This is influence by factors like consumer awareness, target audience and product information. The criteria used in selecting the U.S. as a viable target market for this product was the size of the market. This market has diversity in both cultural and racial demographics hen ce making it a suitable market. Access to consumers was vital criteria since upon the manufacture of the devices, availing them to the target consumers with ease would be very important to Atek. Also the way consumers relate to product launches of this kind of nature was very important when selecting the market area. The cost of market reach is weighed against the cost of potential gain and from the past studies and researches done Atek from

Worldview Assignment Essay Example for Free

Worldview Assignment Essay The idea of God being actively involved in His creation is a core, fundamental belief or doctrine found in Christianity. In fact I’d venture to say that it is one of the first things a person must realize and recognize about God in order to better understand the other aspects of Him and also our role in the world. In the very first verse of the Bible, (Genesis 1:1) we read that God created the heavens and the Earth. Over the course of the next five days, he created everything else including humans, animals, basically- everything. However, He did not stop there, he didn’t just â€Å"wind up the clock and let it tick† so to speak, but rather he is still actively involved in his creation everywhere from a universal perspective all the way down do an individual basis. One thing we must keep in mind though is that we will never be fully able to understand God. Erikson says in his book, Christian Doctrine â€Å"God can never be captured in human concepts.† Later he states, â€Å"There will always be a difference gap between God and human beings.† We will never be able to completely understand Him, but he reveals enough of himself to us for us to be able to comprehend some of His most important characteristics. Another aspect that is very important to consider, is that God enjoys his creation. We find in Genesis 1:31 â€Å"God saw all that he had made, and it was very good.† What does that mean to us as his creation? It means that He cares for us and is invested in us. Not invested in way that means he is reliant on us, however he wants best for us. God created Humans in â€Å"His image† according to Genesis. This means that we are special to Him, and even more- He wants to have a relationship with us. This further means that he created us with the intention of staying involved. In Isaiah 43:7 it says â€Å"Everyone who is called by My name, and whom I have created for My glory, whom I have formed, even whom I have made. The first half of that verse is particularly relevant in the context of discussing why we are here and what God expects from us. In Ephesians 2:10 it says, â€Å"for good works, which God prepared ahead of time, so that we should walk in them† What this tells us is that God has actively been active  and involved in His creation- eve n before He created it. So what does all this mean for the modern Christian? First and foremost it means that we have a reason for being here, secondly it means that we are serving an active God, who is currently involved in our lives. As M.J. Erikson says in his book Christian Doctrine p87 â€Å"†¦God is present and active within his creation and within the human race, even those members it that do not believe in or disobey him. His influence is everywhere.† This means that, as Christians, we are to treat everyone as Gods creation; not just other believers. For example, I am currently in the military and would like to pursue a career in intelligence/government after I graduate from Liberty. So how does the fact that God is currently involved in my life affect me on my career? It means that I need to maintain my integrity at all times, and with everyone I come in contact with. While still attempting to be as competitive as possible in this field, I must also keep in mind that God has a specific plan for me, ((Jeremiah 29:11. 12) â€Å"For I know the plans I have for you†¦you will call to Me and come and pray to Me, and I will listen to you.†) and that anybody that I would be potentially figh ting against for a certain position or privilege is also part of God’s creation. Which means they deserve respect and honesty from me. Just like Erikson says in his book, â€Å"By virtue of our origin, we have kinship with the rest of God’s creation, and in particular with the entire human race.† One of the most obvious scenarios I can see myself in where respect for another human is required regardless of whether I think they deserve it or not; is if somebody with authority over me in the Army tells me to do something. Something which I know is a waste of time or pointless, but I must do it anyways because they are in authority over me. My main motivation for doing so is because I know that God placed him in authority over me, and secondarily because I will face punishment (from him, not God) if I don’t! In conclusion, we have to realize that when God created everything, he didn’t just kick back and is now just watching us do our thing for his entertainment. He is actively involved if our world and our lives. To deny so, would be to deny one of the basest principles found in the Bible. He cares about every one of us, a quote from Erikson’s book which reads â€Å"God personally cares for those who are His.† Let us try to live lives which reflect that love that we receive from him in every way possible. Bibliography Erickson, Millard. Introducing Christian Doctrine, 2nd ed. Grand Rapids: Baker, 2001.

Four Things To Do to Increase One’s Level of Contentment and Happiness Essay Example for Free

Four Things To Do to Increase One’s Level of Contentment and Happiness Essay The learned Viktor Frankl contends that â€Å"chance decides what happens but we decide how to take it† (cited in Southwick, et. al. , 2006, p. 162). For someone who has been through the most tragic circumstances of human existence, Frankl is surely someone who knows pretty well how happiness is to be pursued in one’s life. While it can be argued that happiness is a state of human living which cannot be singularly defined, we – human persons that we are – nevertheless know what brings it about or how it affects our general take of life. Pursuing Happiness All throughout One’s Life The basic thrust of this paper is to argue that our state of contentment or happiness is something that we human persons can always choose to pursue. By adopting Frankl’s philosophy, we can say that a person can always choose the path towards happiness against the backdrop of different life circumstances and issues that come with one’s lifespan development. First, one can always choose to discover his or her crafts, potentials and talents as a way to appreciate one’s giftedness and uniqueness. This is a very potent element that contributes well to one’s happiness; and this usually happens during one’s late childhood and adolescent stages. The discovery of our uniqueness gives us a sense of who we are. But even when, for instance, one is not gifted enough, one can still discover certain strains of uniqueness to be appreciated. This is crucial because it can give us an initial taste of our sense of directedness and purpose. Second, a person needs to choose the kind of relationships that work in order to attain a level of happiness as well. This is especially true for those who are at the early adulthood stage. Growing up, it would be normal to feel that we need someone to complete us; and finding that suitable someone is notably crucial for this stage. Many people end up either unhappy or miserable because they did not either take the courage to pursue a person whom they love or feel powerless to break free from relationships that just do not work. But finding true happiness is about choosing the right relationships that could nurture, and not defeat life. Third, in order to secure happiness, one must always face life-crises with a brimming sense of optimism. This surely is a case of no little importance, as it is not uncommon to learn that many middle-agers suddenly lose their sense of meaning at a time when life-crises emerging from home and workplace start to take their toll. Crises, it needs to be remembered, cannot be avoided. But they are defining moments that can either make or break us. Increasing one’s state of happiness during these poignant moments therefore necessitates a commitment to hope – i. e. , one faces life problems with a sense of optimism. If one can face problems convinced that he or she can successfully get out of it, then it is like facing a battle half-winning it already. Fourth, one can look at his or her life under the lenses of accomplishment and gratitude so as to be happy. This especially applies to those who are in the twilight of their lives. When one becomes bitter every time he or she looks back at the past, it effectively robs a person with a sense of contentment and happiness. Instead, looking back at life with eyes fixed on the accomplishments and blessings that one has done or received in his or her life surely elicits an incomparable sense of contentment, happiness and pride. Conclusion This paper therefore concludes that a person is always empowered to make a choice in order to increase his or her level of contentment or happiness. In any lifespan development or stages, the choice to uphold sense of happiness is always a concrete possibility; i. e. , we can always choose to discover one’s giftedness, choose the relationships that could make us happy, choose to face life-crises with hopefulness and choose to be thankful in our lives. In the final analysis, it must be ultimately argued that we are the ones responsible for our own happiness.

Microwave power transmission using rectenna

Microwave power transmission using rectenna   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Abstract microwave power transmission using rectenna A high efficient rectanna was design and tested at 5.8GHz frequency, which is use to power up applications. Patch antenna used with a low return low simulated in ADS. The micro-strip patch is a good practice for manufacturing physical antenna, as it will be easy to fabricate. The designed patch antenna have been employed in a 22 and 14 triangular antenna array so that the power and gain can be increased. The patch antenna captures the RF signal and then feed through 50 ohm feed line into the low pass filter and then into the rectifying circuit giving DC power. A low pass filter at 5.8 GHz was constructed. The diode used for the rectifying circuit is HSMS 2862 or HSMS 2080 schottky. A comparison analysis has been done between different designs of antenna. The results compared and best possible DC voltage was achieved in ADS simulation. ADS results achieved by simulating the designs for antennas, low pass filters and rectifying circuits were efficient. The designs were manufactured. The result generated from the physical antenna and the simulation is studied. Chapter 1 1 Introduction As the technology is growing the world is now moving toward wireless power. We can see that now days everyone prefers to use a wireless mouse or a wireless headphone. The use of batteries can make this possible but the problem is that too many batteries are being used and there has to be a way by which these applications can run wirelessly and the best thing would be if the batteries were not used. How can this be possible? This is the problem which we will try to solve in the design. The rectanna used will convert the RF power into dc signal and instead of batteries the application will have a rectanna to produce the power. Therefore we will have a true wireless system, which has no wires and no batteries. Although we have to agree that may be so power will not be produced by these rectanna but still as the technology increase, the rectanna manufacturing will also be improved. The word ‘rectenna as we know today was first introduced by Brown [4]. The basic concept of rectanna is a â€Å"rectifying antenna†. In other word an antenna which will be used for receiving RF signal and a rectifying circuit which is used to give us DC power. Personally I view rectanna as a wireless battery, which is a very cool device. Wireless power transmission (WPT) can be viewed as an electrical grid which generates power. WPT is the technology which is used for wireless transmission of power, this will be used in future for solar power satellites [4]. Let me explain the concept in detail. As the satellites are orbiting around the earth 24 hour and the satellites have the capability to convert the solar power into RF signals and then beam those RF signal to the earth. Array of antennas will be used to capture those RF signals and the rectifying circuits to convert those into DC power. If sufficient amount of array antennas are used, a lot of power can be produced. The electrical power station would be viewed as RECTANNA stations where RF signal would be converted into DC power. 1.1 History of Microwave Power Transmission Tesla was the first person who introduced the idea of wireless power transmission. Tesla was not able to produce power with the RF signal because the transmitted power got diffused in all the direction with 140 KHz radio signal [4]. The problem faced by Tesla was overcome, by the fact that higher RF frequency has greater directivity and so the power can be transmitted in a particular direction. Radar technology used in world-war 2 was also very helpful in advancing the growth of wireless power. In the early 1960s W.C. Brown used that latest technology to produce wireless power for the first time. The word â€Å"Rectanna† which we use today was first developed by W.C. Brown. He used an antenna with a rectifying circuit to produce power. The conversion was very good. Based on browns research work, where P.E. Glaser in 1968 introduced a solar power satellite [4] [3]. 1.2 Objectives The object of this thesis is to design a rectanna which will be able to receive microwave energy at 5.8 GHz and then converting that signal to DC power. This thesis will also help to provide a new ways of exploring energy resources. A secondary objective is to reduce the return losses so that maximum output can be achieved. A comparison analysis is done between series and parallel configuration of the 5.8ghz antenna. 1.2.1 Scope of thesis: Perform a good and comprehensive literature review so that all the concepts of RF electronics could be understood. Understand different antenna designs and test them to get the best possible result. Simulating and creating a functional micro-strip patch antenna design suitable for the rectenna frequency of operation of 5.8 GHz. Designing, simulating and creating the rectifier circuit. 1.3 Thesis Outline The thesis was completed in two semesters. Each a certain number task must be completed. Semester 1: Involves literature review of patch antenna, low pass filter and rectifier. The array of antenna design will also be taken under consideration and will be tested and simulated in ADS software and a prototype of 44 circular and triangular patch antenna will be build for testing purpose. Semester I Introduction to the topic Finding the research papers and resources Literature review Design proposal Simulation in ADS Operational system in ADS Prototype for testing Semester 2: The 2nd semester was utilized to make better designs and operation of antennas. Rectifying circuit will be improved as well. An application will be tested, so that the patch antenna can be used to power a small application. Semester II Tweaking of the design Making system efficient Measurements and results Comparison analysis of design Documentation and final report Chapter 2 2 Introduction To Literature Review This section outlines brief theory of micro-strip patch antennas .. The library resources were used extensively and the journals related to the power transmission using rectanna were studied in detail. The articles were used to get idea about the design as well as methods of adapting the microwave techniques. 2.1 Motivation The possibility of transferring power wirelessly can open up infinite applications. The fact that wireless application will not be powered by the batteries but instead use RF signal to generate the power is so extraordinary that everyone would want to be a part of the technology. The idea of using the solar space satellites to create power is not very new. It was first presented in 1968 by Peter E. Glaser [4] [3]. The area of wireless power is not only limited to power generation by satellites but in fact it can be used in daily electronics, such as a wireless headphone, wireless keyboard, wireless mouse and even in wireless small motors. This research will give me a glimpse of future technologies that lies ahead of us. 2.2 What I Want to Achieve At the end of this thesis I hope to have a rectenna which will convert RF signals into DC power and that DC power will be used for any selected application. 2.3 Important Points About Antenna An antenna is device which is made so that it can radiate and receive radiating power from the electromagnetic wave. There are some important points that we need to know about antenna before proceeding towards the main antenna design. 2.3.1 Antenna gain: The ratio of input power to the output power is called antenna gain. 2.3.2 Directivity: The property of antenna to radiate electromagnetic waves in a particular direction is called directivity. If the electromagnetic waves are concentrated in a particular direction then we can that antenna has good directivity. Directivity and gain are related to each other by the following formula. Gain = efficiency/Directivity. 2.3.3 Polarization: The phenomena of polarization can be understand as the orientation of electromagnetic waves at distance from the source. The polarization types have been show in the table below. 2.3.4 Impedance Matching: The energy transfer can only be possible if the antenna and the transmission lines are matched. Typically 50 ohm impedance is used for the radio. If the antenna is not match then the input power or the output power will be reflected back. As a result power will be lost and desired results will not be achieved. 2.3.5 VSWR and the Reflected power of antenna: The voltage standing wave ratio (VSWR) is a parameter, which tells us that how good the impedance match is done. A VSWR of 2:1 is considered good. Most of the antennas which are built have a VSWR of 1.5:1. Chapter 3 3 Rectenna design 3.1 Introduction to rectenna The above diagram shows a basic design of a rectanna. The antenna receives the RF signals. The signal is passed to the low pass filter by a transmission line which has an impedance of 50 ohm. The low pass filter will filter the desired frequency so that unwanted frequency does not go through the rectifying circuit. The low pass filter is also used to stop the harmonics reflected back from the diode. The rectifying circuit is used in double configuration. The double configuration is used so that maximum RF signal can be converted into DC power. Schottky diodes will be used in the rectification process as they have low voltage drop across it. The overall efficiency of the rectanna can be determined by ?= PdcPinc, Pdc is the DC output power. Pinc is the Incident RF power 3.2 Operating frequency The most common frequency used is 2.45GHz and 5.8GHz. The directivity of antenna is more at 5.8GHz. Over all a lot of applications are available at these frequencies. 3.3 Substrate Material Taconic TLX-0 was used for the physical design of the antennas. It has the following properties: H = 0.787 mm(height) T = 17  µm er= 2.45 TanD = 0.0019 Taconic TLX-0 laminate are low loss antennas.[8] 3.4 Design Specifications Chapter 4 4 Array Antennas and Design: 4.1 Introduction to Array Antennas and Design In this section is related with the antenna design in detail and the array antenna design for achieving greater power. 4.2 Micro-strip Patch Antenna The patch antenna is triangular. It has 3 layers. The bottom layer is the ground, middle is the dielectric substrate and the upper layer which is made up of copper or gold. As you can see in the figure, the 3 layer are shown. The patch antenna radiates because of the fringing fields between the ground and the patch. For good performance the thick dielectric should be used with a low dielectric constant [13]. As the design does not allow us to use a thick dielectric, otherwise the size of the antenna would be very big, so in our design a thin dielectric with high dielectric constant would be used. A micro strip antenna has some advantages and some drawback. Some of the advantages and drawbacks are given in the table. ADVANTAGES OF MICROSTRIP ANTENNA Light weight and have low volume with low profile. Fabrication cost is low, easily manufactured in big quantities. Circular and Linear polarizations can be made in them. Dual frequency and dual-polarization is also possible with this. Microwave integrated circuits can be integrated with them as well. The antenna structure can be fabricated with Feed lines and matching networks within. Figure 7 Advantages of microstrip DISADVANTAGES OF MICROSTRIP ANTENNA Bandwidth Narrow Lower gain Large losses with the feed structure. Cannot be high power handling capacity Figure 8 Disadvantages of microstrip 4.3 Feed Technique There are two types of feeding techniques Contacting: In this type feed network the RF signal is feed directly into the patch antenna. Non contacting: In this configuration electromagnetic field coupling occurs due to transfer of energy between the line of mirco-strip and the patch. 4.3.1 Micro-strip Line Feed As you can see in the figure the simplest way of having a feed line is to attach a transmission line feed with the edge of the antenna. This feed line technique is very useful as the feed line and the antenna are both on the same plane. The structure is on the same surface and area is also reduced. It has a better utility as now the antenna (with the feed line) can be place in numerous applications. The thickness of the feed line determines the impedance of the line. 4.4 ANALYSIS 4.4.1 Triangular patch antenna : As we know that lots of work have been on rectangular patch antennas and the circular patch but for my design I will be using a triangular patch so that the radiation pattern and the return losses can be studied. The size of the triangular patch is smaller than the rectangular patch, so a much more efficient design. The design formulas are, in the later sections of the report. 4.4.2 Design specifications 4.4.2.1 TRANMISSION LINE MODEL : In my design I have used the transmission line model to develop the concepts and theory behind the triangular patch antennas the equilateral triangular patch was also design using the transmission model. Resonant frequency The resonant frequency is given by [14] fr=ckmn2pEr =2c3aEr(m2 +mn+n2)1/2 1 In the above equation c is the velocity of the light in the free space. Er is the dielectric constant and K(mn) are the different modes of harmonic order. The lowest order resonant frequency given by [14] fr=2c 3aEr2 The effect of fringing field was not consideration in the above equation. The fringing field occurs at the antenna patch edge. In our case the fringing field will occur at the edge sides of the equilateral triangle. The fringing fields are depended on the physical dimension of the triangular patch and the height of the substrate material. The figure below shows the field lines of a micro-strip antenna. The maximum amount of field lines are going into the substrate and some of them are in the air. The side of a patch is increased due to the fringing field effect. The side length of a triangular patch antenna will no longer will be the same as we have to take account of the effective dielectric constant Ee. The modified equations are given below. The equation above does not take given very accurate results, as it does not consider the fringing fields produced by the antennas. The Er in equation (1) and (2) can be replaced by effective dielectric constant. The dielectric constant given by [14] Ee=Er+12+Er-14(1+12h/a)-12 3 Similarly the a can be replaced by aeff (effective). The value of the aeff (effective) given by [14] aeff=a+hEr -4 Where h is the height of the material Thus equation 2 can be replaced with the effective value of aeff and Ee giving us the final equation given by [14] fr=2c 3aeffEe5 4.4.3 Excitation technique: 4.4.3.1 Micro-strip feed: The location of feed point is determined according to dimension of the antenna. Once we have calculated the accurate dimension of the antenna then we have to connect it with a 50ohm transmission line. In my design I will be using the center fed for the patch antenna. There are two ways to do this. The first is using a quarter wave transformer and the 2nd is to use the inset model. 4.4.3.2 INSET MODEL: A triangular patch antenna was designed using the inset model. The advantage of using the inset model is that the size of the antenna reduces as compared to the quarter wave transformer design [14]. The length of the triangular patch is d. the length of transmission patch is l and the width of the transmission patch is w. the width and length of transmission patch if design do that a 50ohm impedance can be achieved. 4.4.3.3 Quarter Wavelength Transformer The quarter wave transformer is a system which is used to match the impedance. As we know that the resistance Rin of the antenna will not matched with the feed line which has a impedance of 50 ohm. A formula is used to calculate the impedance of the quarter wave transformer. 4.5 Antenna design The calculation for different antennas was designed in ADS. And the result will be shown in much detail the later sections of the report. The operating frequency is 5.8GHz. The result show in the table below is for triangular patch. 4.6 Introduction to Array theory The range of the system can be increased by array of antennas which are working together and the focus of the reception or transmission of energy also increase in a particular direction[10]. The antenna in an array can be manufactured on a micro-strip with a feed network and a power divider. There are two kinds of feed network in array antennas Single line(series feed network) Multiple feed network The series-feed network in an array of antennas is limited with a fixed beam[13]. We can see that series feed is easy to manufacture as it has the same configuration which repeats. There is a major disadvantage, any change to a single element can affect the remaining elements. The antenna elements are fed by a 1 to N (in corporate network).The power divider network has a identical path lengths to all the elements, from the feed point [13]. The phase of the element can be controlled in the corporate network with the help of phase shifters. Amplifier can be used to fix the amplitude [13]. 4.6.1 The Array Factor The array factor depends on Number of elements Element spacings Amplitude Excitation phase which is applied to each elements within the array 4.6.2 Array design As we see in the previous section that that array design is deeply affected by the element of spacing, so for 5.8 GHZ antenna the wavelength is 51.72mm, based on these factors the element spacing for 5.8GHZ antenna the element spacing should be 38.79mm. We can see that the element spacing is 0.75 % of the given wavelength. As we can see in the below figure that the quarter transformer is matched with antenna which has a impedance of 100ohm. The 100ohm line are combined together and gives a resulting impedance of 50ohm at the meeting point of the line. In the last the two 100ohm lines are combined to give a 50ohm impedance which is same for a feed line. 4.6.3 Metering of Corners In our design we are using a microstrip. So with the mircostrip antennas, the 90% angle at any corner can cause large reflection from the 90% degree angle. So a smooth edge has to be made, so that there are no reflection losses. To reduce the reflection factor the edges are metered at the corner so that there is a smooth flow of current. A equation can be used to metered the corners which is given by the equation below. 4.7 Simulation results in ADS 4.7.1 Single triangular patch 4.7.1.1 Single triangular patch : 4.7.2 Single patch with inset model: 4.7.2.1 Single patch with inset model: 4.7.3 2X2 triangular patch with inset model: 4.7.4 14 linear triangular patch: 4.7.5 Single patch with quarter wave transformer 4.7.6 22 triangular patch with quarter wave transformer CHAPTER- 5 LOW PASS FILTER 5 Low Pass Filter 5.1 Introduction to low pass filter In this chapter we will discuss the low pass filter and why is it important for the rectanna design. The techniques which will be used and calculation used to make a low pass filter. The results which are calculated by the ADS calculation will also be show in this section. 5.2 Theory behind LPF The antennas which were designed in the previous section was for 5.8Ghz but still some extra frequencies have to be filtered. The rectifying circuit also cause reflection from the first harmonics. To stop those reflection from the diode, LPF is used. LPF is extensional for the design as it can increase the power of the antenna. The LPF block the signal coming back from the diode and so the phenomena of re-radiation does not occur. The LPF is usually designed for the lower frequencies. We can use lamped component for the design but there is a problem with that. The lamped component can also cause reflection, so SMT components should be used to avoid the reflections from the inductor or the resistors. There is another good way, instead of using lumped component, the LPF can also be designed on the same transmission line by using Richard transmission. I think it would be the best thing for our design because then we would be able to make the design on the same surface. The whole design would have the same physical platform and planer surface can be achieved. There are two kinds of low pass filter which we can use in our design. Equal ripple Maximum flat 5.3 LPF Design The filter can be designed by using â€Å"Richardson method from chapter of Micro-wave engineering by david pozar[9]. We have to get the values from the table then Richard transformation is used to get the series inductors and the stub used and the shunt capacitors to shunt stubs. For Richard ?/8 at ?= ?C. Then the 2nd step would be to use the kuroda identity to series stub and shunt stubs. For the frequency of ?/8 at 2.45 GHz) and (?/8 at 5.8 GHz) we need to apply the impedance and the frequency scaling to get the accurate value. 5.3.1 Equal ripple low pass filter 5.3.2 Maximum low pass filter 5.4 Simulation results from ADS 5.5 LPF AT 5.8GHZ 5.5.1 LFP EQUAL RIPPLE (5.8GHZ) 5.5.2 LPF MAX FLAT(5.8GHZ) CHAPTER 6 6 RECTIFYING CIRCUIT FOR RECTENNA 6.1 INTRODUCTION TO RECTIFYING CIRCUIT FOR RECTENNA The final stage of the rectenna design is the rectanna which actually converts the RF signal into the DC voltage. As the diode has its own impedance so we have to match the impedance of the rectifying circuit as well. The method by which the impedance was match and the results obtained from the ADS simulation will be looked. 6.2 Single Rectifier design The single diode configuration is very easy to understand. In the positive wave of the AC signal the diode d5 is forward biased and the capacitor is being charged. When the negative wave come, the diode is reverse biased and no current crosses the diode and at that time the capacitor is providing the voltage. As the capacitor is providing the voltage we have small ripples in the simulation and in practical applications. 6.3 Single voltage quadrupler: The quadrapler provides 4 times the voltage as campared to the single rectifying circuit. The configuration is easy to fabricate and easy to understand. In the positive cycle the 2nd diode and the 4th diode is forward biased allowing the capacitor c4 and c1 to be charged. In the negative cycle the 1st and the 3rd diode are reversed biased and the capacitor c3 and c2 are being charged. The four capacitor voltages adds up before the resistor, giving us four times the voltage at the resistor. 6.4 Four 5.8 ghz with quadraupler in parallel configuration: In this design we have again used a quatrupler configuration bt this time we are using 4 sources in parallel with each other. The four parallel source were used to replicate the design, when 4 parallel antennas are used and then feeding into a single quadrupler rectifier configuration. The results are show below. 6.5 Four 5.8 ghz with four individual quadraupler rectifier in parallel configuration: The difference between the above design and this design is that, this time individual rectifier is being used with a single 5.8ghz source. The configuration is used in parallel combination. 6.6 Four 5.8 ghz with quadraupler in series configuration : In the design below a series combination was used. Four 5.8ghz source which is acting like a 5.8ghz patch antenna are configured in series conbination. The output from the source is then feed into the voltage quadrupler. The results are shown below. 6.7 HSMS 2862k Diode parameters Chapter 7 7 Conversion efficiency 7.1 Introduction to Conversion efficiency The design with different configuration was tested in ADS simulation. Now we have to move towards the physical antennas and we need to determine how we can mearsure the efficiency of a rectanna. When the antenna designs are manufactured we will tested the parrallel combination with the series combination. We will be comparing two designs. 14 array of antenna 22 array of antenna Chapter 8 8 Complete Rectenna design In this section we will see the complete rectanna design on a single surface. Which means that the low pass filter and the rectifying circuit will be on the same surface as that of the array antennas The dimension and the simulated results of all the component were shown in the above sections of the report. Chapter 9 9 CONCLUSION As we have seen that all the design of the antennas and the other component were tested at maximum in ADS and the results obtained from the ADS simulation shows that we are on the right track and we will be cable of manufacture a good efficient antenna is the next semester. The antenna will be able to convert the RF signal in DC power. The low pass filters were designed and we saw that the equal ripple filter show a much better results and so we will be using that with our design. The rectifying circuit were build and tested and a practical results show that we need a minimum of 3dbm power, so that the SMT led can be turned ON. In the future a 5.8 ghz antenna with array of 22 and 14 will be made. The simulation of 22 and 14 antenna array is already done in ADS. The designs are ready for manufacturing. 9.1 Prototype and gerber Files for Manufacturing 10 Appendix References J.O. McSpaden J.C. Mnakins, â€Å"solar power programs and MWP(micro wave wireless power),† IEEE Micro, volume. 3, number. 4, pages. 46-57, Dec 2002 J.A. Hagerty and Z.Popovic, â€Å"experimental results of a broad band arbitrarily polarized antenna,† found in IEEE MTT-S Int. Moscow Sym. Dig., May 2001, volume 3.,pages 1855-1858 D.G.Guha, Y.M.Antar and J.Y. Siddiqui and M. Biswas â€Å"Resonanting resistance for microstrip-line-fed for a circular-micro-strip patches† Ieee Proc Microw. Antennas Propagation† found in volume 152, Number 6, Dec 2005 W C. brown, â€Å"history of wireless power transmisson† IEEE Transaction on Microwave Theory and Techniques, 1983 Wireless-Power-Transmission(WPT) for the use of Solar Power Satellite found at site www.sspi.gatech.edu (Accessed 13th June 2008) R.P. Jedelika, â€Å"measured mutal coupling between antennas and the patch antennas†, IEEE Trans. on Antennas and Prop., pp. 147-149 Jan. 1981 Change, K. â€Å"Radio frequency and Microwave Wireless Systems† by John Wiley and Sons, Inc 2000 Taconic material â€Å"TLX-0 Data Sheet† TACONIC Advanced Dielectric Division David, M. P. â€Å"Microwave Engineering, second edition by † John Wiley and Sons, Inc 1998 Chang.K. â€Å"Radio Frequnecy and Micro-wave power wireless wystems, Chapter 3 to Chapter 4 Antenna Systems† by John Wiley and Sons, Inc 2000 Kai.chang,RF and microwave wiresless system chapter.3 pp 89-98. 2000 I. J. Bahle and P. Bhartia, â€Å"Microstrip patch Antennas†, Artech House Inc, Dedham, MA 1980 Balanise, C.A â€Å"Antenna Theory and Analysis for Design by † Wiley-Interscience, John Wiley and Sons, Inc., Hoboken, New Jersey 2005 I. J. Bahle and P. Bhartia, â€Å"Microstrip Antennas†, Artech House Inc, Dedham, MA 1980 Matsumoto. H Shinohara. N, â€Å"study on array of antennas for wireless power transmission† IEEE, volume. 46, number. 3, 1998 Bhartia, B. Roa and K.V.S. Tomar, R.S. â€Å"Millimeter-Wave Microstripe for Printed Circuit and Antennas† Arteche House, Inc, United States of America, 1991

The Power of Angels in America Essay -- Kushner Angels in America Essa

The Power of Angels in America         Ã‚  "Such ethical possibility is, however, founded on and coextensive with the subject's movement toward what Foucault calls 'care of the self,' the often very fragile concern to provide the self with pleasure and nourishment in an environment that is perceived not particularly to offer them." -Eve Kosofsky Sedgwick    "Demanding that life near AIDS is an inextricably other reality denies our ability to recreate a sustaining culture and social structures, even as we are daily required to devote such time to the details of the AIDS crisis." -Cindy Patton    Tony Kushner's two-part play (or, if you will, two plays) Angels In America is one of most famous and most powerful plays about AIDS and gay life to come out of the early 1990s. It not only engages with the political issues surrounding AIDS and homosexuality in Reaganite America, but also deals with deeply philosophical questions of identity and the nature of God. It's no surprise that this play has sparked comment, including the criticism of the conservative right. In this paper, I intend to examine two of the articles written on the play. The first, Gordon Rogoff's "Angels in America, Devils in the Wings," is quite problematic, and errors of fact that the author makes about the play lead me to wonder at its value for analysis. The second article, Charles McNulty's "Angels in America: Tony Kushner's Theses on the Philosophy of History" pose some difficult questions regarding the plays' relationship to the concept of history, arguing that Millennium Approaches1 deconstruc ts history while Perestroika moves away from this deconstruction. According to McNulty, this is a problem in the second part of the pla... ... One of Angels in America. Perestroika is Part Two of the play. Works Cited Kushner, Tony. Angels in America, Part One: Millennium Approaches. New York: Theatre Communications Group, Inc., 1992. ---. Angels in America, Part Two: Perestroika. New York: Theatre Communications Group, Inc., 1992. McNulty, Charles. "Angels in America: Tony Kushner's Theses on the Philosophy of History." Modern Drama 39.1 (1996): 84-96. Patton, Cindy. "Teaching About AIDS." Inventing AIDS. New York: Routledge, 1990. 99-120. Rogoff, Gordon. "Angels in America, Devils in the Wings." Theater 24.2 (1993), 21-29. Sedgwick, Eve Kosofsky. "Paranoid Reading and Reparative Reading; Or, You're So Paranoid, You Probably Think This Introduction is About You." Novel Gazing: Queer Readings in Fiction. Ed. Eve Kosofsky Sedgwick. Durham: Duke UP, 1997. 1-37. The Power of Angels in America Essay -- Kushner Angels in America Essa The Power of Angels in America         Ã‚  "Such ethical possibility is, however, founded on and coextensive with the subject's movement toward what Foucault calls 'care of the self,' the often very fragile concern to provide the self with pleasure and nourishment in an environment that is perceived not particularly to offer them." -Eve Kosofsky Sedgwick    "Demanding that life near AIDS is an inextricably other reality denies our ability to recreate a sustaining culture and social structures, even as we are daily required to devote such time to the details of the AIDS crisis." -Cindy Patton    Tony Kushner's two-part play (or, if you will, two plays) Angels In America is one of most famous and most powerful plays about AIDS and gay life to come out of the early 1990s. It not only engages with the political issues surrounding AIDS and homosexuality in Reaganite America, but also deals with deeply philosophical questions of identity and the nature of God. It's no surprise that this play has sparked comment, including the criticism of the conservative right. In this paper, I intend to examine two of the articles written on the play. The first, Gordon Rogoff's "Angels in America, Devils in the Wings," is quite problematic, and errors of fact that the author makes about the play lead me to wonder at its value for analysis. The second article, Charles McNulty's "Angels in America: Tony Kushner's Theses on the Philosophy of History" pose some difficult questions regarding the plays' relationship to the concept of history, arguing that Millennium Approaches1 deconstruc ts history while Perestroika moves away from this deconstruction. According to McNulty, this is a problem in the second part of the pla... ... One of Angels in America. Perestroika is Part Two of the play. Works Cited Kushner, Tony. Angels in America, Part One: Millennium Approaches. New York: Theatre Communications Group, Inc., 1992. ---. Angels in America, Part Two: Perestroika. New York: Theatre Communications Group, Inc., 1992. McNulty, Charles. "Angels in America: Tony Kushner's Theses on the Philosophy of History." Modern Drama 39.1 (1996): 84-96. Patton, Cindy. "Teaching About AIDS." Inventing AIDS. New York: Routledge, 1990. 99-120. Rogoff, Gordon. "Angels in America, Devils in the Wings." Theater 24.2 (1993), 21-29. Sedgwick, Eve Kosofsky. "Paranoid Reading and Reparative Reading; Or, You're So Paranoid, You Probably Think This Introduction is About You." Novel Gazing: Queer Readings in Fiction. Ed. Eve Kosofsky Sedgwick. Durham: Duke UP, 1997. 1-37.