CST – Computer Simulation Technology

Decade Bandwidth Circularly Polarized Antenna Array

Title:
Decade Bandwidth Circularly Polarized Antenna Array
Author(s):
Kevin Khee-Meng Chan, Adrian Eng-Choon Tan, Karumudi Rambabu
Source:
IEEE Transactions on Antennas and Propagation
Vol./Issue/Date:
Volume: 61, Issue: 11, November 2013
Year:
2014
Page(s):
5435 - 5443
Keywords:
Circular polarized antenna array, decade bandwidth, feed network design, sequential rotation, ultra-wideband antenna
Abstract:
A circularly polarized antenna array design comprising of a feed network that splits an input signal into four orthogonal (0 , 90 , 180 , and 270 ) phased signals with equal magnitudes and connected to four anti-podal Vivaldi antennas sequentially rotated by 90 is presented. The proposed antenna array yields 10-dB return loss and 3-dB axial ratio bandwidths from 1–10 GHz. The symmetrical structure gives the antenna array almost identical azimuth and elevation radiation patterns. Pulse reception from various angles show equi-amplitude outputs and very little distortion. The proposed design is suited for high-resolution microwave imaging systems.
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