Vol. 22

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2011-05-27

A Compact Size and Small Frequency Ratio CPW-Fed Circular Slot Antenna for GPS/WLAN Dual-Band and Circular Polarizations

By Chia-Yen Wei, Ji-Chyun Liu, Tian-Fu Hung, Sheau-Shong Bor, and Chi Chiang Chen
Progress In Electromagnetics Research C, Vol. 22, 1-9, 2011
doi:10.2528/PIERC11050410

Abstract

This paper presents a novel dual-band circularly polarized CPW-fed circular slot antenna with two open-ground rings. The proposed antenna is constructed with two opened-ground rings facing in opposite directions and embedded in the circular slot, and the enhanced feed strip of CPW. By way of adjusting the relevant parameters, we can obtain the dual-band at 1.57 GHz and 2.46 GHz respectively. A smaller frequency ratio of 1.56 is presented. The measured -10 dB return loss impedance bandwidth are 380 MHz (24.68%) for 1.57 GHz band and 210 MHz (8.33%) for 2.46 GHz band. The measured -3 dB axial ratio bandwidth for 1.57 GHz and 2.46 GHz bands are 13.38% and 8.13%, the polarization of radiation patterns are RHCP and LHCP for each band and the antenna gain are 3.72 and 3.21 dBic respectively.

Citation


Chia-Yen Wei, Ji-Chyun Liu, Tian-Fu Hung, Sheau-Shong Bor, and Chi Chiang Chen, "A Compact Size and Small Frequency Ratio CPW-Fed Circular Slot Antenna for GPS/WLAN Dual-Band and Circular Polarizations," Progress In Electromagnetics Research C, Vol. 22, 1-9, 2011.
doi:10.2528/PIERC11050410
http://www.jpier.org/PIERC/pier.php?paper=11050410

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