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Equivalent circuit modeling of broadband antennas using a rational function approximation

✍ Scribed by Youngwook Kim; Hao Ling

Publisher
John Wiley and Sons
Year
2006
Tongue
English
Weight
121 KB
Volume
48
Category
Article
ISSN
0895-2477

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✦ Synopsis

Abstract

This paper describes a technique for synthesizing an equivalent circuit for a broadband antenna. A method is proposed for generating a rational function approximation with real coefficients in order to model the input impedance of the antenna in the frequency domain. An algorithm is then developed to find the best‐fit positive‐real rational function that is realizable by passive circuits. The technique is applied to a planar UWB antenna from 3 to 10 GHz. The results show that a modeling error of 0.59% can be achieved. The Brune's theorem is used to synthesize an equivalent circuit of the antenna. Β© 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 950–953, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21529

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