volume | PIER Journals

2011-05-27

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

Chia-Yen Wei,

Dr. Chia-Yen Wei

Ph.D. Program in Electrical and Communications Engineering

Feng-Chia University

Taiwan, R.O.C.

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Ji-Chyun Liu,

Prof. Ji-Chyun Liu

Dept. of Electrical Engineering

Ching Yun University

Taiwan

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Tian-Fu Hung,

Dr. Tian-Fu Hung

Department of Electrical Engineering

Feng Chia University

Taiwan

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Sheau-Shong Bor,

Dr. Sheau-Shong Bor

Department of Electrical Engineering

Feng-Chia University

Taiwan

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Chi Chiang Chen

Dr. Chi Chiang Chen

Department of Electrical Engineering

Feng-Chia University

Taiwan, R.O.C.

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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

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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

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