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A Four-Arm circularly polarized high-gain high-tilt beam curl antenna for beam steering applications

Zhou, H and Pal, A and Mehta, A and Mirshekar-Syahkal, D and Nakano, H (2018) 'A Four-Arm circularly polarized high-gain high-tilt beam curl antenna for beam steering applications.' IEEE Antennas and Wireless Propagation Letters, 17 (6). 1034 - 1038. ISSN 1536-1225

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Abstract

A novel circularly polarized (CP) beam-steering four-arm curl antenna with four feed points is presented. The antenna provides steerable high-gain high-tilt right-handed CP (RHCP) beams for satellite communications. The antenna operates over a test frequency band of 1500-1670 MHz and covers the entire L1 band. The four arms are arranged symmetrically with respect to the center of the antenna, and each arm is fed by a coaxial line. When one of the four feed points is excited and the remaining feed points are either open-circuited or terminated to 50 impedance, the antenna generates an RHCP tilted beam of 49° in the elevation plane. At a test frequency of 1575 MHz, the antenna provides a gain of 8.12 dBic. The antenna can switch the tilted beam in the four different space quadrants in the azimuth plane by exciting one feed point at a time. It is found that over the test band, the antenna provides a total efficiency of more than 89% and a gain of greater than 8 dBic.

Item Type: Article
Divisions: Faculty of Science and Health > Computer Science and Electronic Engineering, School of
Depositing User: Elements
Date Deposited: 29 Jun 2018 12:08
Last Modified: 16 Nov 2018 15:15
URI: http://repository.essex.ac.uk/id/eprint/22337

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