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A CPW-Fed Broadband Circularly Polarized Regular-Hexagonal Slot Antenna With L-Shape Monopole

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5 Author(s)
Shui-Wei Zhou ; Inst. of Commun. Eng., PLA Univ. of Sci. & Technol., Nanjing, China ; Ping-Hui Li ; Yang Wang ; Wei-Hua Feng
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A regular-hexagonal structure of wide-slot antenna for broadband circular polarization (CP) based on coplanar waveguide (CPW) feed is presented. By protruding into the slot an L-shape monopole patch, and featuring two inverted-L grounded strips around two opposite sides of the slot, wide impedance bandwidth and wide axial-ratio (AR) bandwidth can be obtained simultaneously. By notching a rectangle in the ground conductor near the feed line, the antenna performance is further improved. The proposed antenna can provide an impedance bandwidth (S11 <; -10 dB) of 86% and a 3-dB AR bandwidth of 50%, respectively.

Published in:

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