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Broadband Circularly Polarized Microstrip Antenna Array Using Sequentially Rotated Technique

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3 Author(s)
Yong-Jin Hu ; Inst. of Commun. Eng., PLA Univ. of Sci. & Technol., Nanjing, China ; Wei-Ping Ding ; Wen-Quan Cao

In this letter, a broadband circularly polarized microstrip antenna array with a separate feed network layer is presented. A Wilkinson power divider that provides high isolation between elements and subarrays is employed in constructing the non coplanar corporate feed network of the array. The corporate-fed 4×4 antenna array composed of sequentially rotated 2×2 subar rays is designed and fabricated. The measurement results indicate that the proposed array exhibits a 1-dB axial-ratio (AR) bandwidth of 47.8% in which the return loss is below -10 dB.

Published in:

Antennas and Wireless Propagation Letters, IEEE  (Volume:10 )