volume | PIER Journals

2018-06-07

A Method for Matching Parasitic Unidirectional Electrically Small Array

Ruiyang Li,

Dr. Ruiyang Li

School of Electronics and Information

Northwestern Polytechnical University

China

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Gao Wei,

Dr. Gao Wei

School of Electronic and Information

Northwestern Polytechnical University

China

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Derek McNamara

Dr. Derek McNamara

University of Ottawa

Canada

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Progress In Electromagnetics Research Letters, Vol. 76, 121-126, 2018

doi:10.2528/PIERL18041705

Abstract

General design guidelines for unidirectional electrically small parasitic array has been proposed by several researchers; however, the input resistance of these antennas is normally very low. In order to practically ``transfer'' this high directivity into realized gain, an appropriate matching mechanism is necessary. This paper gives a simple matching method by adding an inductive stub close to the antenna feed, which can effectively increase the antenna input impedance to 50 Ω and keep the gain almost invariant. Besides, it could make the resonant frequency very close to the frequency where maximum gain occurs, thus a high realized gain can be achieved. Computed and measured examples are given to validate this method.

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Ruiyang Li, Gao Wei, and Derek McNamara, "A Method for Matching Parasitic Unidirectional Electrically Small Array," Progress In Electromagnetics Research Letters, Vol. 76, 121-126, 2018.
doi:10.2528/PIERL18041705

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