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2016-10-10

Circularly Polarized Substrate Integrated Waveguide Cavity-Backed Antenna with Enhanced Bandwidth for Wideband Wireless Applications

By Tian Li, Fu-Shun Zhang, Fei Gao, and Yan-Li Guo
Progress In Electromagnetics Research C, Vol. 68, 85-93, 2016
doi:10.2528/PIERC16071104

Abstract

A circularly polarized substrate integrated waveguide (SIW) cavity-backed antenna with the feasibility of obtaining a wide bandwidth is proposed and demonstrated. Fed by a modified inverted-T stripline, the proposed double-layered stacked antenna, consisting of an improved circular SIW cavity and a conventional perturbed circular patch radiator, is designed, analyzed and fabricated. Good agreement between simulated and measured results is observed. Simulation and measurement results reveal that the proposed antenna can provide an impedance bandwidth of 22.1% (4.94-6.17 GHz) and a 3-dB axial ratio (AR) bandwidth of 18.7% (5-6.03 GHz). Additionally, within the effective circular polarization (CP) bandwidth of 18.7% (5-6.03 GHz), the proposed antenna has gains from 4.3 dBic to 7.1 dBic with an average gain of 5.9 dBic. The measured CP bandwidth of 18.7% (5-6.03 GHz) not only meets the need for certain Wi-Fi (5.2/5.8 GHz) or WiMAX (5.5 GHz) band communication application, but also provides the potential to implement multiservice transmission.

Citation


Tian Li, Fu-Shun Zhang, Fei Gao, and Yan-Li Guo, "Circularly Polarized Substrate Integrated Waveguide Cavity-Backed Antenna with Enhanced Bandwidth for Wideband Wireless Applications," Progress In Electromagnetics Research C, Vol. 68, 85-93, 2016.
doi:10.2528/PIERC16071104
http://jpier.org/PIERC/pier.php?paper=16071104

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