Circular-polarized substrate-integrated-waveguide leaky-wave antenna with wide-angle and consistent-gain continuous beam scanning
Date
2019
Authors
Chen, S.L.
Karmokar, D.K.
Li, Z.
Qin, P.Y.
Ziolkowski, R.W.
Guo, Y.J.
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Journal article
Citation
IEEE Transactions on Antennas and Propagation, 2019; 67(7):4418-4428
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Abstract
Circularly polarized (CP) antennas are in high demand for use in future wireless communications. To advance the development of CP substrate-integrated-waveguide (SIW) leaky-wave antennas (LWAs) with the intent to meet this demand,a novel benzene-ring-shaped slot-loaded LWA with partially reflecting wall (PRW) vias is investigated and verified to realize wide-angle continuous beam scanning with consistent gain. The dispersion features of slot-loaded SIW LWAs with PRW vias are theoretically explored using an equivalent circuit model. The CP radiation feature is investigated numerically utilizing the E- and H-field distributions of an initial design and its equivalent magnetic currents. The results of these studies are used to demonstrate that improved CP performance over a wide-angles can range can be attained with a change from a standard slot shape to a benzene-ring-shaped slot. The resulting benzene-ring shaped slot-loaded CP SIW LWA was optimized, fabricated, and measured. The measured results verify that a CP beam was continuously scanned through a wide angle from backward to forward directions with a consistent gain. The prototype exhibits a continuous 97.1° CP beam scan with a gain variation between8 and 11.3 dBic when the source frequency is swept from9.35 to 11.75 GHz.
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Link to a related website: https://opus.lib.uts.edu.au/bitstream/10453/135598/4/Binder1.pdf, Open Access via Unpaywall
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Copyright 2019 IEEE
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