Vol. 59

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2015-11-10

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

By Ling Sun, Bao-Hua Sun, He Wu, Jiangpeng Yuan, and Wending Tang
Progress In Electromagnetics Research C, Vol. 59, 159-166, 2015
doi:10.2528/PIERC15101101

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.

Citation


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
http://www.jpier.org/PIERC/pier.php?paper=15101101

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