Vol. 34

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2012-11-14

Broadband Single-Fed Single-Patch Circularly Polarized Microstrip Antenna

By Feng Xu, Xueshi Ren, Ying-Zeng Yin, and Shou-Tao Fan
Progress In Electromagnetics Research C, Vol. 34, 203-213, 2013
doi:10.2528/PIERC12091610

Abstract

The paper demonstrates a novel antenna which can achieve a broad impedance bandwidth and circularly polarized bandwidth with a suspended corner-truncated square patch and a new probe-fed rectangular strip. By incorporating a probe-fed rectangular strip inside a high substantial cavity (~ 0.144λ0), a broad impedance bandwidth (VSWR < 2.0) of 770 MHz (31.43%) is achieved. To obtain a good circularly polarized (CP) bandwidth overlap with the impedance bandwidth, two stubs with optimized lengths are loaded with the non-radiating edges of the corner-truncated square patch symmetrically. Measured results show that the CP antenna features a wide operating bandwidth of 10% ranging from 2.41 GHz to 2.66 GHz (VSWR < 1.5 and axial ratio < 3 dB) and that of 22.45% ranging from 2.31 GHz to 2.86 GHz (VSWR < 2 and axial ratio < 6 dB) and good radiation patterns with cross-polarization level (LHCP) lower than the co-polarization level (RHCP) by more than 20 dB at the broadside direction. The average gain of this antenna is recorded as about 8.16 dBi across the operating bandwidth.

Citation


Feng Xu, Xueshi Ren, Ying-Zeng Yin, and Shou-Tao Fan, "Broadband Single-Fed Single-Patch Circularly Polarized Microstrip Antenna," Progress In Electromagnetics Research C, Vol. 34, 203-213, 2013.
doi:10.2528/PIERC12091610
http://www.jpier.org/PIERC/pier.php?paper=12091610

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