terahertz antenna array with interdigital electrodes Lei Hou‚ Wei Shi*‚ Ming Xu‚ Yong Chen Department of applied physics‚ Xi’an University of Technology‚ Shaanxi‚ China‚ 710048 ABSTRACT In this work a powerful terahertz antenna array with interdigital electrodes is fabricated‚ and the performance of one antenna unit is compared with a conventional resonant dipole antenna. The antenna unit has a better capacity of generating THz wave compared with a conventional resonant dipole antenna at the same
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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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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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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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MEENAKSHI SUNDARARAJAN ENGINEERING COLLEGE DEPARTMENT OF ECE EC2353-ANTENNAS AND WAVE PROPAGATION QUESTION BANK UNIT – I PART – A 1. What is retarded current? 2. Define hertzian dipole. 3. Define antenna gain. 4. What are the two types of radiation pattern? 5. State reciprocity principle. 6. Define antenna temperature. PART – B 1. Derive the expression for calculation of electromagnetic field due to an alternating current element.
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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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dividing the occurrence of square ended seals from the rectangular ended seals. Any sites with the evidence of square ended seals are likely to have existed prior to 2200 B.C.‚ while other sites with rectangular seals would have been settled after this time period. With this in mind‚ the sites “B”‚ “D”‚ Garam Masala (GM) and Phul-Gobi Lower (PGL) that had the square ended seals probably existed prior to 2200 B.C. On the other hand‚ rectangular seals were found in sites “B”‚ “C”‚ “E”‚ Tiltandula (T)
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Student Name | | Class | Comp230 | Date | 03/04/2013 | Windows CLI Commands Lab Report NOTE: Please use Carriage Returns and Page Breaks as needed to prevent box contents from extending across page boundaries. Task 1: Displaying IP Configuration Settings Open the Windows Command Prompt using the desktop or the Taskbar icon. Maximize the size of the CLI. Use the ipconfig /all command to determine the following IP configuration settings for “Wired” Ethernet NIC: IP Address: | 169
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STUDY OF ANTENNA MINIATURIZATION AND FEEDING TECHNIQUES Divya Sharma‚ Manvi Chandra‚ Rishi Pahwa‚ Vishal Madan Abstract:These days‚ size reduction & bandwidth enhancement are becoming major design considerations for practical applications of antennas. For this reason‚ studies to achieve compact & broadband operations of microstrip antennas have greatly increased. Much significant progress in the design of compact microstrip antennas with broadband‚ dual-frequency‚ dual polarized‚ circularly
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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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