volume | PIER Journals

2012-07-18

Design of CPW-Fed Circularly Polarized Antenna with Two Orthogonal Slots

Mao-Ze Wang,

Dr. Mao-Ze Wang

National Laboratory of Antennas and Microwave Technology

Xidian University

China

Homepage

Fu-Shun Zhang,

Dr. Fu-Shun Zhang

Xidian University

China

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Yang Zhu,

Dr. Yang Zhu

Xidian University

China

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Liu-Tao Ma

Dr. Liu-Tao Ma

Xidian University

China

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Progress In Electromagnetics Research Letters, Vol. 33, 109-117, 2012

doi:10.2528/PIERL12053107

Abstract

A design of coplanar waveguide (CPW)-fed circularly polarized slot antenna is presented. The proposed antenna consists of two orthogonal slots. By making use of the symmetric current and electric-field distributions of the two gaps of CPW-fed, a simple power divider is easily achieved. By adjusting the length of the two orthogonal slots and CPW-fed bent slot, a circularly polarized wave of two orthogonal modes with equal amplitude and phase difference of 90 degree is excited. The numerical results show that the 10 dB return loss bandwidth and 3 dB axial ratio (AR) bandwidth are 50.8 % and 11.2 % respectively. A prototype antenna is fabricated and measured, the measured results show that the proposed antenna achieves a good performance of circularly polarization.

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Mao-Ze Wang, Fu-Shun Zhang, Yang Zhu, and Liu-Tao Ma, "Design of CPW-Fed Circularly Polarized Antenna with Two Orthogonal Slots," Progress In Electromagnetics Research Letters, Vol. 33, 109-117, 2012.
doi:10.2528/PIERL12053107

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