A radio signal from send and return takes about 2.5 seconds. As the path loss is 252dB‚ it is easy to think out how hard it is to build an EME communication system.[2] An EME communication system requires top station‚ power amplifier and a giant antenna array. As EME communication is hard to come out‚ it is the highest realm of amateur radio communication activity. Secondly‚ because radio signal propagation has straight line
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References: [1] Tesla‚ N.‚ “The transmission of electric energy without wires”‚ Electrical World‚ March 5‚ 1904 [2] Brown‚ W [3] Kaya‚ N.‚ S. Ida‚ Y. Fujino‚ and M. Fujita‚ “Transmitting antenna system for airship demonstration of Space Energy and Transportation” IEEE Vol.1‚ No.4‚ 1996‚ pp.237-245 [4] Fujiwara‚ E.‚ Y [5] Hatsuda‚ T.‚ K. Ueno‚ M. Inoue‚ “Solar power satellite interference assessment”‚ IEEE‚ Vol. 3‚ No. 4‚ Dec. 2002‚ pp.65-70
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CONTENTS 1. Abstract 2. Basic concept 3. Description of individual components Space segment 1. Integrated Symmetrical Concentrator 2. Solar Cells 3. Microwave Generator 4. Antenna 5. Retrodirective Target Detection 6. Beam Formation Ground Receiving Site 1. Rectenna 2. Power Network 4. Working 5. Launching of the satellite 6. Advantages 7. Future work 8. Conclusion ABSTRACT: Mankind has
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number of portable communication devices is increasing tremendously‚ the design of low profile communications system is in high demand nowadays. The size of antenna can be designed with many kinds of miniaturization techniques. This thesis presents the design of a fractal patch microstrip antenna and a simple rectifying circuit. The antenna is a miniaturized first iteration Koch fractal island patch at 2.45 GHz ISM band (WiFi‚ RFID‚ Bluetooth‚ etc). It is intended for a rectenna which is used to
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efficiency can approach close to 100%. We can more concentrate the transmitted microwave power to the receiver aperture areas with taper method of the transmitting antenna power distribution. Famous power tapers of the transmitting antenna are Gaussian taper‚ Taylor distribution‚ and Chebychev distribution. These taper of the transmitting antenna is commonly used for suppression of sidelobes. It corresponds to increase the power transmission efficiency. Concerning the power transmission efficiency of the
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Revolution was right in line with the development of the computer (Yagi‚ 2000). Researching internal events‚ not just observable information‚ was one reason the computer has become so important. How people think‚ perceive‚ remember‚ and learn is a process that is associated with the mental studies of psychology that is a branch of cognitive psychology (Yagi‚ 2000). The human brain is very multifaceted and it determines particular behaviors (Yagi‚ 2000). The brain also holds mysteries referred to as human
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1. Which if the following IPv6 address type is assigned to multiple interfaces but packets will only be delivered to one? a. Multicast b. Anycast c. Unicast d. Broadcast Grade: 1 User Responses: b.Anycast Feedback: a.An anycast address is assigned to a group of interfaces on multiple nodes. Packets are delivered to the “first” interface only. 2. Routers operate at which OSI layer? a. Physical b. Transport c. Network d. Session Grade: 1 User Responses:
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Acknowledgements Firstly‚ we express our highest gratitude to Allah the Almighty for divine blessings without which it was not possible to accomplish this project and thesis successfully. We would like to specially thank our honorable supervisor Imran noor‚ Faculty of Engineering‚ American International University – Bangladesh for giving us enormous support and valued guidance concerning this thesis. We would like to express specially thank our honorable Ex-supervisor Mr. Tareq Aziz‚ Assistant
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International Journal of Computer and Electrical Engineering‚ Vol.4‚ No.2‚ April 2012 Wireless Transmission of Electrical Power Overview of Recent Research & Development Sagolsem Kripachariya Singh‚ T. S. Hasarmani‚ and R. M. Holmukhe wireless transmission at 1891 in his “experimental station” at Colorado. Nikola Tesla successfully lighted a small incandescent lamp by means of a resonant circuit grounded on one end. A coil outside laboratory with the lower end connected to the ground
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Broadcasting and Acoustics 1. (Mar 1996) One-hundred twenty µbars of pressure variation is equal to a) 120 dBspl b) 115.56 dBspl c) 41.58 dBspl d) 57.78 dBspl 2. The color phasor has what phase for the I signal? a) 180° b) 37° c) 90° d) 57° 3. What is the allowable bandwidth of commercial AM radio in the United States? a) 10 kHz b) 37 kHz c) 10MHz d) 15 kHz 4. What information other than the sound has to be transmitted in TV transmission? a) Visual signals b) Synchronizing
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