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2016-10-25
A Broadband Low Cross-Polarization U-Slot Patch Antenna Array Based on Differential Feed
By
Progress In Electromagnetics Research C, Vol. 68, 211-219, 2016
Abstract
In this paper, a single layer 4×4 U-slot patch antenna array based on differential feed was developed to achieve a wide bandwidth and low cross polarization with a simple feeding network. A U-slot was cut on a radiation patch to realize a wideband performance, and a microstrip-line fed structure was adopted to make the patch and feed network placed in a single layer. In order to reduce extra cross-polarization level in the H-plane caused by cutting U-slot, differential feed is adopted, which also makes it easily integrated with differential devices (such as differential amplifier) directly without baluns. A single layer U-slot patch array based on differential feed and an array having the same structure but based on normal feed were made and compared with each other. The designed differentially-fed patch array has more than 12% measured impedance bandwidth and stable gain at 18-19 dBi across the operating band from 5.2 to 5.88 GHz. The measured result shows that a better asymmetry of radiation pattern in the E-plane and a lower than -40 dB cross-polarization level in the H-plane can be achieved compared with normally-feed array.
Citation
Zhimin Zhu Chunhong Chen Yunjiao Chen Wen Wu , "A Broadband Low Cross-Polarization U-Slot Patch Antenna Array Based on Differential Feed," Progress In Electromagnetics Research C, Vol. 68, 211-219, 2016.
doi:10.2528/PIERC16052404
http://www.jpier.org/PIERC/pier.php?paper=16052404
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