A Compact Two-Level Sequentially Rotated Circularly Polarized Antenna Array for C-Band ApplicationsReport as inadecuate




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International Journal of Antennas and Propagation - Volume 2015 2015, Article ID 830920, 10 pages -

Research ArticleDepartment of Information Engineering, University of Florence, V.S. Marta 3, 50139 Florence, Italy

Received 27 July 2015; Revised 25 October 2015; Accepted 28 October 2015

Academic Editor: Ikmo Park

Copyright © 2015 Stefano Maddio. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A compact circular polarized antenna array with a convenient gain-bandwidth-dimension trade-off is proposed for applications in the C-band. The design is based on the recursive application of the sequential phase architecture, resulting in a 4 × 4 array of closely packed identical antennas. The 16 antenna elements are disc-based patches operating in modal degeneration, tuned to exhibit a broad while imperfect polarization. Exploiting the compact dimension of the patches and a space-filling design for the feeding network, the entire array is designed to minimize the occupied area. A prototype of the proposed array is fabricated with standard photoetching procedure in a single-layer via less printed board of overall area 80 × 80 mm

. Adequate left-hand polarization is observed over a wide bandwidth, demonstrating a convenient trade-off between bandwidth and axial ratio. Satisfying experimental results validate the proposed design, with a peak gain of 12.6 dB at 6.7 GHz maintained within 3 dB for 1 GHz, a very wide 10 dB return loss bandwidth of 3 GHz, and a 4 dB axial ratio bandwidth of 1.82 GHz, meaning 31% of fractional bandwidth.





Author: Stefano Maddio

Source: https://www.hindawi.com/



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