Dual-Band Antenna Array Fed by Ridge Gap Waveguide with Dual-Periodic Interdigital-Pin Bed of Nails

Boju Chen; Xiaoming Chen; Xin Cheng; Yiran Da; Xiaobo Liu; Steven Gao; Ahmed A. Kishk

doi:10.3390/s24165117

Sensors (Aug 2024)

Dual-Band Antenna Array Fed by Ridge Gap Waveguide with Dual-Periodic Interdigital-Pin Bed of Nails

Boju Chen,
Xiaoming Chen,
Xin Cheng,
Yiran Da,
Xiaobo Liu,
Steven Gao,
Ahmed A. Kishk

Affiliations

Boju Chen: School of Information and Communications Engineering, Xi’an Jiaotong University, Xi’an 710049, China
Xiaoming Chen: School of Information and Communications Engineering, Xi’an Jiaotong University, Xi’an 710049, China
Xin Cheng: School of Information and Communications Engineering, Xi’an Jiaotong University, Xi’an 710049, China
Yiran Da: School of Information and Communications Engineering, Xi’an Jiaotong University, Xi’an 710049, China
Xiaobo Liu: School of Information and Communications Engineering, Xi’an Jiaotong University, Xi’an 710049, China
Steven Gao: Department of Electronic Engineering, The Chinese University of Hong Kong, Hong Kong 999077, China
Ahmed A. Kishk: Department of Electrical and Computer Engineering, Concordia University, Montreal, QC H3G 1M8, Canada

DOI: https://doi.org/10.3390/s24165117
Journal volume & issue: Vol. 24, no. 16
p. 5117

Abstract

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A dual-band (K-/Ka-band) antenna array is presented. An ultra-wideband antenna element in the shape of a double-ridged waveguide is used as a radiation slot, and a novel dual-periodic ridge gap waveguide (RGW) with an interdigital-pin bed of nails (serving as a filter) is used to realize dual-band operation. By periodically arranging the pins of two different heights in two dimensions, the proposed RGW with interdigital-pin bed of nails is able to realize and flexibly adjust two passbands. The widely used GW-based back cavity boosts the realized gain and simplifies the feed network design. A 4 × 4 prototype array was designed, fabricated, and measured. The results show that the array has two operating bands at 24.5–26.4 GHz and 30.3–31.5 GHz, and the realized gain can reach 19.2 dBi and 20.4 dBi, respectively. Meanwhile, there is a very significant gain attenuation at stopband.

Published in Sensors

ISSN: 1424-8220 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Technology: Chemical technology
Website: http://www.mdpi.com/journal/sensors

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