"Yagi antenna" Essays and Research Papers

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    tag to tag communication

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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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    Wirelessly Charging Mobile Devices from Ambient RF Sources ABSTRACT: Wireless charging is any of several methods of charging batteries without the use of cables or device-specific AC adaptors. Wireless charging can be used for a wide variety of devices including cell phones‚ laptop computers and MP3 players as well as larger objects‚ such as robots and electric cars. Radio charging is used for charging items with small batteries and low power requirements‚ such as watches‚ hearing aids‚ medical

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    Design of Broadcast

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    minimum transmitter power shall be 10 kW. The antenna height is limited to 2‚000 ft. above the average terrain. Class-A stations shall only be allowed in Metro Manila Classand Metro Cebu. Cebu. 1 Classes of FM Broadcast Stations Class-B Stations ClassA Class-B station shall have an authorized transmitter Classpower not exceeding 10 kW and an effective radiated power (ERP) not exceeding 30 kW. The minimum transmitter power shall be 1 kW. The antenna height is limited to 500 ft. above the average

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    reaching the receiving antenna multiple times via different angles and at slightly different times. In radio‚ multiple-input and multiple-output‚ or MIMO (commonly pronounced my-moh or me-moh)‚ is the use of multiple antennas at both the transmitter and receiver to improve communication performance. It is one of several forms of smart antenna technology. Note that the terms input and output refer to the radio channel carrying the signal‚ not to the devices having antennas. MIMO technology has attracted

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    Television.

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    Monochrome Television Receiver Consists of the following functional sections which will be studied and explained as: 1. Input from Antennas: Strongest signal is induced in the antenna if it has same polarization as the transmitting antenna. All TV antennas are mounted in horizontal position for better reception and favorable signal to noise ratio. A yogi antenna‚ i.e. a dipole with one reflector and two or more directors‚ is a compact high gain directional array‚ and is often used in fringe areas

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    Microwave Design

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    TERRESTRIAL MICROWAVE COMMUNICATION SYSTEM DESIGN DESCRIPTION OF THE MICROWAVE BEAM: 1. The microwave beam behaves like a light beam and it tends to follow a straight line and azimuth. 2. The changes on temperature‚ pressure and relative humidity tends to refract the microwave beam. So it will follow on a slightly curved path. The radio horizon exists. 3. It is diffracted when grazing over an obstacle. A small shadow area created when some of the energy is redirected. 4. The beam

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    Industrial Training Report

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    CHAPTER ONE - INTRODUCTION 1.1 PURPOSE OF INDUSTRIAL ATTACHMENT The Industrial Attachment program also known as Student Industrial Work Experience Scheme (SIWES) fulfills part of the requirement in pursuing the degree of Bachelor of Science (Computer Science) in the Redeemer’s University. This is a training that should last for a minimum of six months. It is intended to expose student to the real life working experience. 1.2.1 OBJECTIVES OF SIWES The objectives of SIWES are: *

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    Installation of BTS

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    cable ladder for supporting Outdoor work consists of fixing of RF antenna and Microwave antenna Routing of cables Clamping Ground / Earthing Alignment of Antenna as per specifications Indoor Installation of Radio Base Station (RBS) Installation of Tx. Rack Fixing of cable ladder Grounding of equipments Installation of rectifier and battery bank GSM Antenna Installation The installation of antenna mounting pipes associated with mechanical arrangement will be examined

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    References: A.K. Gautan antenna and wave propagation Gabriel Agwu Igwue principle of communication engineering Frieden‚ Robert. “telecommunication.” Microsoft Encarta 2009.

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