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Wideband Triple- and Quad-Resonance Substrate Integrated Waveguide Cavity-Backed Slot Antennas With Shorting Vias
A triple-resonance and a quad-resonance substrate integrated waveguide (SIW) cavity-backed slot antennas using shorting vias are presented in this paper. The antennas have wide bandwidths and low profiles. The working mechanism of the triple-resonance antenna is explained with its electric field dis...
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Published in: | IEEE transactions on antennas and propagation 2017-11, Vol.65 (11), p.5768-5775 |
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Main Authors: | , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | A triple-resonance and a quad-resonance substrate integrated waveguide (SIW) cavity-backed slot antennas using shorting vias are presented in this paper. The antennas have wide bandwidths and low profiles. The working mechanism of the triple-resonance antenna is explained with its electric field distributions and equivalent circuit models. By loading the SIW cavity with shorting vias, the lowest mode (half-TE110 mode) is shifted upward and coupled with two higher modes (even and odd TE210 modes). As a result, a wide bandwidth with triple resonances is achieved for the antenna. Based on the similar principle, a quad-resonance antenna having an even wider bandwidth is also developed. Prototypes of the two antennas are fabricated and measured. With a low profile of 0.03λ 0 (wavelength in free space), the triple-resonance design has a bandwidth of 15.2% and a peak gain of 4.80 dBi, and the quad-resonance design has a bandwidth of 17.5% and a peak gain of 7.27 dBi. |
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ISSN: | 0018-926X 1558-2221 |
DOI: | 10.1109/TAP.2017.2755118 |