Substrate-Integrated Cavity-Backed Array With Controlled Mutual Coupling for Wide Scanning
In this letter, a planar triangular-lattice array with suppressed mutual coupling (MC) is proposed for wide scanning. The array element is comprised of two interconnected substrate-integrated cavities (SICs) with identical slots. An embedded feeding network is used to excite equal-amplitude and in-p...
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Published in | IEEE antennas and wireless propagation letters Vol. 21; no. 4; pp. 808 - 812 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
New York
IEEE
01.04.2022
The Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Subjects | |
Online Access | Get full text |
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Summary: | In this letter, a planar triangular-lattice array with suppressed mutual coupling (MC) is proposed for wide scanning. The array element is comprised of two interconnected substrate-integrated cavities (SICs) with identical slots. An embedded feeding network is used to excite equal-amplitude and in-phase radiations of the two SIC-backed slots, yielding nearly cosine-type isolated element patterns that cater for the wide scanning. With the cancelation of common-mode couplings and the low-coupling characteristic of the differential mode, the phased array exhibits suppressed MC. Wave-trap resonators are loaded for the further reduction of MC, resulting in the wide-angle impedance matching. The array offers wide-angle beam steering up to ± 65° in E-plane, ± 50° in H-plane, and ± 60° in D-plane, with mitigated fluctuation of realized gain. |
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ISSN: | 1536-1225 1548-5757 |
DOI: | 10.1109/LAWP.2022.3149032 |