A Simple Wide-Angular Scanning Phased Array With Wideband Filtering Response

This article presents a low-profile planar phased array with improved reflection (wideband filtering response) and radiation (wide-angular scan) performance. On one hand, the filtering response with harmonic suppression is integrated into the design of the single-layer array element without extra fi...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2022-09, Vol.70 (9), p.7703-7712
Main Authors: Cheng, You-Feng, Wang, Ying-Xi, Feng, Ju, Zhong, Jia-Li, Liao, Cheng, Ding, Xiao
Format: Article
Language:English
Subjects:
Antenna measurements
Broadband
Dipole antennas
Filtering antenna
Filtration
Impedance
Linear antenna arrays
Magnetic resonance
phased array
Phased arrays
Radiation
Scanning
Sidelobe reduction
Sidelobes
Slot antennas
vertical polarization
wide-angular scan
wide-beam antenna
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Summary:This article presents a low-profile planar phased array with improved reflection (wideband filtering response) and radiation (wide-angular scan) performance. On one hand, the filtering response with harmonic suppression is integrated into the design of the single-layer array element without extra filtering resonators, such as external filters. As a result, the designed array possesses a reflection bandwidth of 4.6-5.3 GHz and two radiation nulls at either the upper or lower band edge of the reflection curve. On the other hand, inspired by the wide-beam radiation of a circular patch loaded with parasitic monopoles, the proposed array is able to realize its beam scanning coverage of −60°-+60° with low sidelobe levels (SLLs) in its E-plane. The reflection and radiation properties are validated by full-wave simulation and measurement of an eight-element array prototype. The filtering and low-SLL performance benefit for the array to avoid out-of-band interferences and in-band ones from other directions when it scans in a wide-angular area.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2022.3205218