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...

Full description

Saved in:
Bibliographic Details
Published inIEEE antennas and wireless propagation letters Vol. 21; no. 4; pp. 808 - 812
Main Authors Jin, Fu-Long, Shao, Wei, Xiao, Li-Ye, Wang, Bing-Zhong, Jiang, Baojun
Format Journal Article
LanguageEnglish
Published New York IEEE 01.04.2022
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Beam steering
Couplings
Holes
Impedance matching
Mutual coupling
Phased array
Phased arrays
Reactive power
Resonators
Scanning
Silicon carbide
Strips
substrate-integrated cavity (SIC)
Substrates
wide-angle impedance matching (WAIM)
wide-angle scanning
Online AccessGet full text

Cover

More Information
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.
ISSN:1536-1225
1548-5757
DOI:10.1109/LAWP.2022.3149032