Antenna Characterization for Wireless Power-Transmission System Using Near-Field Coupling Wireless power transmission is the transmission of electrical energy from a power source to an electrical load without man-made conductors. Wireless transmission is useful in cases where interconnecting wires are inconvenient‚ hazardous‚ or impossible. So a study was made on the investigation of wireless power transmission by near-field coupling from the view
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30 hp December 2011 Design of an Antenna for a Wireless Sensor Network for Trains Malkolm Hinnemo Abstract Design of an Antenna for a Wireless Sensor Network for Trains Malkolm Hinnemo Teknisk- naturvetenskaplig fakultet UTH-enheten Besöksadress: Ångströmlaboratoriet Lägerhyddsvägen 1 Hus 4‚ Plan 0 Postadress: Box 536 751 21 Uppsala Telefon: 018 – 471 30 03 Telefax: 018 – 471 30 00 Hemsida: http://www.teknat.uu.se/student An antenna for a wireless sensor network for trains is designed
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Antenna Basics Theory Basic terms Basic antenna types 1 ©Kathrein/Scholz 07/04 Antenna Basics / Theory What is an antenna ? An antenna is the converter between two kinds of electromagnetic waves : cable bounded waves ⇔ free space waves 2 ©Kathrein/Scholz 07/04 Antenna Basics / Theory antenna principle shown by bending a coax cable open the pulsing electrical field‚ created by the transmitter‘s high frequency power‚ cannot leave the cable the field lines
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SETIT 2009 Design of a Dual-Band Microstrip Patch Antenna for GSM/UMTS/ISM/WLAN Operations Said GHNIMI*‚ Adnen RAJHI* and Ali GHARSALLAH* *Unité de recherche Circuits et Systèmes Electroniques Haute Fréquences‚ Faculté des sciences de Tunis said.ghnimi@fst.rnu.tn adnen.Rajhi@esti.rnu.tn ali.gharsallah@fst.rnu.tn Abstract: This paper describes the design of a dual-frequency antenna for GSM and UMTS/LAN/ISM system applications. A patch antenna with rectangular aperture is designed by using a thick
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research wireless antennas and differences between them. Antennas are included 3 types: omnidirectional‚ semi-directional‚ and highly-directional. Any antenna has three fundamental properties: gain‚ directional and polarization. Omnidirectional Antennas. We can use this antenna in a: point-multipoint link‚ warehouse‚ hotspot‚ trade show‚ airport. The omnidirectional antennas transmit a signal in all directions‚ it is known dipole ("non-directional") antenna. The most of common antenna with low
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CHAPTER -2 SADDLE ANTENNA 2.1 NOVEL UWB ANTENNA DESIGN CONCEPT Saddle antenna is a unique kind of flared antenna. This Ultra Wide Band antenna is based on using of two smoothly shaped flares of a simple geometrical structure – the saddle. The first flare‚ larger in size‚ serves as an antenna base‚ reflector and one of the radiator arms. The second flare‚ smaller in size‚ operates as the other arm of the radiator. An apparent idea is exploited in this design that an “ideal”
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1. i) • Antenna radiation pattern or antenna pattern is defined as “a mathematical function or a graphical representation of the radiation properties of the antenna as a function of space coordinates.” • The radiation pattern is determined in the far-field region and is represented as a function of the directional coordinates. • Radiation properties include power flux density‚ radiation intensity‚ field strength‚ directivity phase or polarization [pic]
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Antennas & Propagation CS 6710 Spring 2010 Rajmohan Rajaraman Introduction An antenna is an electrical conductor or system of conductors o Transmission - radiates electromagnetic energy into space o Reception - collects electromagnetic energy from space In two-way communication‚ the same antenna can be used for transmission and reception Radiation Patterns Radiation pattern o Graphical representation of radiation properties of an antenna o Depicted as two-dimensional
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NUS/ECE EE4101 Antenna Arrays 1 Introduction Antenna arrays are becoming increasingly important in wireless communications. Advantages of using antenna arrays: 1. They can provide the capability of a steerable beam (radiation direction change) as in smart antennas. 2. They can provide a high gain (array gain) by using simple antenna elements. 3. They provide a diversity gain in multipath signal reception. 4. They enable array signal processing. Hon Tat Hui 1 Antenna Arrays NUS/ECE
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Smart Antenna Systems for Mobile Communications FINAL REPORT Ivica Stevanovi´‚ Anja Skrivervik and Juan R. Mosig c January 2003 Laboratoire d’Electromagn´tisme et d’Acoustique e Ecole Polytechnique F´d´rale de Lausanne e e CH-1015 Lausanne Suisse http://lemawww.epfl.ch/ ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE Contents 1 Introduction 1.1 Evolution from Omnidirectional to Smart Antennas 1.1.1 1.1.2 1.1.3 1.2 . . . . . . . . . . . . . . . . . . . 1 4 4 5 5 8 8 10 14 17 17 19 20 21
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