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Title:Analysis and Design of a Broadband Antenna for Software Defined Radio
Author(s):Zhang, Zhuohui
Doctoral Committee Chair(s):Jennifer Bernhard
Department / Program:Electrical and Computer Engineering
Discipline:Electrical and Computer Engineering
Degree Granting Institution:University of Illinois at Urbana-Champaign
Subject(s):Engineering, Electronics and Electrical
Abstract:This work presents the design and analysis of a broadband antenna capable of achieving an instantaneous 3:1 VSWR bandwidth and omnidirectional radiation coverage spanning a bandwidth greater than 20:1. The antenna is designed to accommodate the very large bandwidth requirements of software-defined radios and to minimize the effective volume of the overall design. The antenna is composed of a vertical radiating element over a wound plane, and utilizes a tuning strap to improve the impedance bandwidth over the frequency range in which the antenna is considered electrically small. Measurements demonstrate a 3:1 VSWR impedance bandwidth from 30 MHz to 6 GHz while maintaining a relatively omnidirectional radiation pattern over the majority of this bandwidth. Equivalent circuit model and analytical model are developed to calculate the input impedance of the antenna over different spectrums. A model of the tuning mechanism is also analyzed along with a discussion of the antenna's efficiency.
Issue Date:2007
Description:137 p.
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2007.
Other Identifier(s):(MiAaPQ)AAI3301258
Date Available in IDEALS:2015-09-25
Date Deposited:2007

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