volume | PIER Journals

2014-08-21

A Compact Microstrip Patch Antenna with Reconfigurable Feed Network for Polarization Diversity

Chun-Xia Cheng,

Dr. Chun-Xia Cheng

National Key Laboratory of Antennas and Microwave Technology

Xidian University

China

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Fu-Shun Zhang,

Dr. Fu-Shun Zhang

Xidian University

China

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Ya-Li Yao

Dr. Ya-Li Yao

School of Electronic Engineering

Xidian University

China

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Progress In Electromagnetics Research Letters, Vol. 48, 67-73, 2014

doi:10.2528/PIERL14071401 | Google Scholar

Abstract

A compact reconfigurable four-feeding microstrip antenna with polarization diversity is presented in this paper. With four triangle-shaped elements as the radiation patch, the proposed antenna can achieve good impedance match for linear polarization (LP), left hand circular polarization (LHCP) and right hand circular polarization (RHCP). A four-way power divider made by three Wilkinson power dividers and interconnected with PIN diodes is designed to feed the four elements. By controlling the states of the diodes, the antenna can produce LP, LHCP and RHCP. By using T-shaped slots on the patch and back to back geometry, a compact size of 0.6λ₀× 0.6λ₀×0.02λ₀ is achieved. The impedance bandwidth of LP is about 80 MHz (3.3%), while the usable bandwidths (overlap of impedance bandwidth and AR bandwidth) of LHCP and RHCP are about 370 MHz (15%) and 250 MHz (10%). The average gain for LP is -2.1 dBi, and that for CP is -3.3 dBi. This reconfigurable patch antenna with switchable polarization has good performance and simple structure, which can be used for 2.4 GHz wireless communication systems.

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Chun-Xia Cheng, Fu-Shun Zhang, and Ya-Li Yao, "A Compact Microstrip Patch Antenna with Reconfigurable Feed Network for Polarization Diversity," Progress In Electromagnetics Research Letters, Vol. 48, 67-73, 2014.
doi:10.2528/PIERL14071401

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