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2017-05-13

A Dual-Port Sum-Difference Beam Antenna with Simple Structure and Very High Isolation

By Zhichao Deng, Fushun Zhang, Min Liang, Ya-Li Yao, and Fan Zhang
Progress In Electromagnetics Research C, Vol. 74, 41-49, 2017
doi:10.2528/PIERC17031303

Abstract

A simple dual-port sum-difference beam antenna with high isolation is proposed. A T-shaped slot is utilized to achieve both sum-difference beam pattern and high port-isolation. The slot coupling feeding structure simplifies the feeding network and avoids complicated fabrication. The proposed antenna is simulated, fabricated and measured. Experimental validations confirm that the antenna has 10-dB impedance bandwidths of 10.2% (4.82-5.33 GHz) for the sum port and 2.0% (4.95-5.05 GHz) for the difference port, respectively. In addition, high port-isolation better than 50dB is achieved covering a wide band from 4.0 GHz to 5.5 GHz. The proposed antenna exhibits a measured peak gain of 6.3 dBi for the sum beam and a null depth better than -26 dB for the difference beam. Measured results agree well with simulated ones.

Citation


Zhichao Deng, Fushun Zhang, Min Liang, Ya-Li Yao, and Fan Zhang, "A Dual-Port Sum-Difference Beam Antenna with Simple Structure and Very High Isolation," Progress In Electromagnetics Research C, Vol. 74, 41-49, 2017.
doi:10.2528/PIERC17031303
http://jpier.org/PIERC/pier.php?paper=17031303

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