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Design and implementation of circularly polarised microstrip antenna array using a new serial feed sequentially rotated technique

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2 Author(s)
Jazi, M.N. ; Dept. of Electr. Eng., Urmia Univ., Iran ; Azarmanesh, M.N.

Investigation results on circularly polarised microstrip antenna arrays at 2.45 GHz are presented. Effects of the feed network in the sequentially rotated technique to improve the antenna performance are reported. A new serial feed sequentially rotated to construct coplanar-fed arrays of large size, that improves antenna performance, is proposed. The results achieved show that this technique not only leads to an improvement in bandwidth, but also results in a better radiation pattern with lower sidelobe levels in the E and H radiation planes. A new 2×2 antenna subarray that has been arranged using the serial-feed sequentially rotated technique was fabricated. The measurement results for resonant frequency, return loss, axial ratio, bandwidth and radiation pattern confirm the integrity of the simulation results.

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Microwaves, Antennas and Propagation, IEE Proceedings  (Volume:153 ,  Issue: 2 )