HIGH ALTITUDE AERONAUTICAL PLATFORMS HAAPS- seminar report | HIGH ALTITUDE AERONAUTICAL PLATFORMS HAAPS- seminar report.DOC (Size: 258 KB / Downloads: 305) ABSTRACT Today’s global communications infrastructures of landlines‚ cellular towers‚ and satellites are inadequately equipped to support the increasing worldwide demand for faster‚ better‚ and less expensive service. At a time when conventional ground and satellite systems are facing increasing obstacles and spiraling costs‚ a low
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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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when playing. The frets are the small vertical metal wires on the fingerboards. They enable the strings to be “shortened” in a certain way. It happens by pressing the string onto the fret to have a certain note. The head is where the tuners and the strings are. The tuners are the item that you turn to tune the tiple. The bridge is the parts that supports the string of the tiple as they cross over the body. The function is when the component transfers the vibrations of the strings into the body of the
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source‚ traveling at the speed of light. The source‚ for example an antenna‚ creates oscillating electric(E)/ magnetic(B) fields. These fields are perpendicular not only to each other but to the direction of the traveling wave‚ and travel away from the antenna. The electromagnetic wave is‚ therefore‚ a transverse wave. The electric/ magnetic fields store the energy of the wave. Basically‚ the oscillating current to the antennas sets the electrons in motion. These electrons‚ being accelerated‚ create
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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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3EC1 MATHEMATICS-III UNIT 1: LAPLACE TRANSFORM - Laplace transform with its simple properties‚ applications to the solution of ordinary and partial differential equations having constant co-efficients with special reference to the wave and diffusion equations. UNIT 2: FOURIER SERIES & Z TRANSFORM – Expansion of simple functions in fourier series. Half range series‚ Change of intervals‚ Harmonic analysis. Z TRANSFORM - Introduction‚ Properties‚ Inverse Z Transform. UNIT 3: FOURIER TRANSFORM - Complex
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A parabolic antenna for Erdfunkstelle Raisting‚ based in Raisting‚ Bavaria‚ Germany. To direct microwaves in narrow beams for point-to-point communication links or radiolocation (radar)‚ a parabolic antenna is usually used. This is an antenna that uses a parabolic reflector to direct the microwaves. To achieve narrow beamwidths‚ the reflector must be much larger than the wavelength of the radio waves. The relatively short wavelength of microwaves allows reasonably sized dishes to exhibit the desired
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MOBILE COMPUTING Chapter 1: Outline 1.1 Introduction to Mobile Computing 1.2 Radio Propagation 1.3 Antennas 1.4 Cellular Systems 1.5 Wireless Link Characteristics ERIC SAVIOUR ARYEE OKAI OCT‚2013 MOBILE COMPUTING 1.1 INTRODUCTION What is Mobile Computing? Mobile Computing is a technology that allows transmission of data‚ voice and video via a computer or any other wireless enabled device without having to be connected to a fixed physical link. ERIC SAVIOUR ARYEE OKAI OCT
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Wiley‚ 2010. [21] P [22] P. V. Nikitin‚ K. V. S. Rao‚ and S. Lazar‚ “An overview of near field UHF RFID”‚ IEEE RFID conference‚ 2007‚ pp. 167-174 [23] A section”‚ IEEE Antennas and Propagation Society International Symposium‚ Jul. 1997‚ vol. 2‚ pp. 1172 - 1175 [26] L [29] X. Qing‚ C. K. Goh‚ Z. N. Chen‚ “Segmented loop antenna for UHF near-field RFID applications”‚ Electronics Letters‚ vol. 45 ‚ no. 17‚ 2009 [30] L [31] Y. Tanaka et al.‚ ” Change of read range for UHF passive RFID tags in close
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CHAPTER 4 TRANSMISSION MEDIA 4.1 Guided Transmission Media Twisted Pair Coaxial Cable Optical Fiber 4.2 Wireless Transmission Antennas Terrestrial Microwave Satellite Microwave Broadcast Radio Infrared 4.3 Wireless Propagation Ground Wave Propagation Sky Wave Propagation Line-of-Sight Propagation 4.4 Line-of-Sight Transmission Free Space Loss Atmospheric Absorption Multipath Refraction 4.5 4.6 Recommended Reading and Web Sites Key Terms‚ Review Questions‚ and Problems Key Terms Review Questions
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