volume | PIER Journals

2019-08-26

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

Tian Li

Dr. Tian Li

National Key Laboratory of Antennas and Microwave Technology

Xidian University

China

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Progress In Electromagnetics Research M, Vol. 84, 117-126, 2019

doi:10.2528/PIERM19062104

Abstract

A dual circularly polarized (CP) substrate integrated waveguide (SIW) cavity-backed antenna with the feasibility of obtaining a wider bandwidth and relatively smaller size than other homogeneous referenced antennas is proposed and demonstrated. Fed by a quadrature hybrid coupler, the proposed double-layered stacked antenna, consisting of a perturbed circular SIW cavity and an improved 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 impedance bandwidths of 45.7% (4.74-7.55 GHz) and 46.2% (4.75-7.6 GHz), as well as 3-dB axial ratio (AR) bandwidths of 37.5% (4.74-6.93 GHz) and 37.2% (4.75-6.92 GHz) for RHCP and LHCP, respectively. Meanwhile, within the effective RHCP/LHCP bandwidths, the proposed antenna has gains from 4.8 dBic to 7.6 dBic with an average gain of 6.4 dBic for RHCP, and gains from 4.9 dBic to 7.5 dBic with an average gain of 6.3 dBic for LHCP, respectively. Additionally, the measured effective dual CP bandwidth of 37.2% (4.75-6.92 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.

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Tian Li, "Dual Circularly Polarized Substrate Integrated Waveguide Cavity-Backed Antenna with Enhanced Bandwidth and Reduced Size for Wideband Wireless Applications," Progress In Electromagnetics Research M, Vol. 84, 117-126, 2019.
doi:10.2528/PIERM19062104

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