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Bandwidth Enhancement of an Aperture Coupled Microstrip Patch Antenna Using a Shunt Stub  

Koo, Hwan-Mo (School of Electronic Engineering, Soongsil University)
Yoon, Young-Min (School of Electronic Engineering, Soongsil University)
Kim, Boo-Gyoun (School of Electronic Engineering, Soongsil University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.49, no.2, 2012 , pp. 39-49 More about this Journal
Abstract
An impedance bandwidth enhancement method of an aperture coupled microstrip patch antenna (ACMPA) using a shunt stub is investigated. The conventional ACMPA with a H-shaped coupling aperture is designed and the electrical parameters for the equivalent circuit of the designed conventional ACMPA are extracted. A method for the enhancement of the impedance bandwidth of the ACMPA using a tuning stub connected in shunt with the feed line is presented. The -10 dB return loss impedance bandwidth of the ACMPA with a shunt stub is increased up to about 14 %. The maximum impedance bandwidth of the corresponding ACMPA without a shunt stub is 5.4 %. The increase of the impedance bandwidth of the ACMPA with a shunt stub compared to that of the corresponding ACMPA without a shunt stub is about 160 %.
Keywords
Bandwidth enhancement; Aperture coupled feeding; Shunt stub; Patch antenna;
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