volume | PIER Journals

2015-11-10

Broadband, Wide Beam Circularly Polarized Antenna with a Novel Matching Structure for Satellite Communications

Ling Sun,

Dr. Ling Sun

National Key Laboratory of Antennas and Microwave Technology

Xidian University

China

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Bao-Hua Sun,

Dr. Bao-Hua Sun

Xidian University

China

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He Wu,

Dr. He Wu

National Laboratory of Science and Technology on Antennas and Microwaves

Xidian University

China

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Jiangpeng Yuan,

Dr. Jiangpeng Yuan

National Laboratory of Science and Technology on Antennas and Microwaves

Xidian University

China

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Wending Tang

Dr. Wending Tang

National Laboratory of Science and Technology on Antennas and Microwaves

Xidian University

China

Homepage

Progress In Electromagnetics Research C, Vol. 59, 159-166, 2015

doi:10.2528/PIERC15101101 | Google Scholar

Abstract

A wide beam, circularly polarized (CP) antenna is presented for satellite communications. The antenna consists of two crossed bent dipoles, two baluns and two pairs of rectangular patches. The two dipoles are fed by the two baluns, respectively. The arms of the dipoles are bent to save the horizontal space and to broaden the beamwidth. The rectangular patches which are connected to the arms of the dipoles form the matching structure of the proposed antenna. The impedance bandwidth of the antenna is broadened by adjusting the length of the rectangular patches. A broadband 90° power divider is used to feed the proposed antenna and to realize circular polarization. The antenna has a -10-dB impedance bandwidths of 77% (1.73-3.89 GHz). The proposed antenna exhibits a measured 2-dB AR bandwidth of 76.3%, from 1.71 GHz to 3.8 GHz. The 3-dB beamwidth is greater than 88°over the whole working band. Results show that the proposed antenna is suitable for the application of satellite communications.

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Ling Sun, Bao-Hua Sun, He Wu, Jiangpeng Yuan, and Wending Tang, "Broadband, Wide Beam Circularly Polarized Antenna with a Novel Matching Structure for Satellite Communications," Progress In Electromagnetics Research C, Vol. 59, 159-166, 2015.
doi:10.2528/PIERC15101101

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