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Millimeter-wave beam steerable slot array antenna using an inter-digitated capacitor based corrugated SIW

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journal contribution
posted on 2022-12-22, 14:21 authored by Aakash Bansal, Chinthana PanagamuwaChinthana Panagamuwa, William WhittowWilliam Whittow
A new class of electronically beam-steerable corrugated substrate integrated waveguide (CSIW) slot array antenna operating at 26 - 29 GHz has been developed. The conventional via based walls of SIWs or stub-based walls of CSIWs have been replaced with an inter-digitated capacitor (IDC) structure to enable reconfigurability. This novel IDC-CSIW is shown to have a lower transmission loss compared with conventional CSIWs in the literature. A new mathematical method has been described to calculate the cut-off frequency of IDC-CSIWs. The surface of the IDC-CSIW is then loaded with longitudinal slots, building a leaky-wave architecture. Radiation from individual slots is controlled by shorting the IDC at specific points using PIN diodes. The antenna is fed at either end using a single-pole-double-throw (SPDT) switch to achieve a 2D reconfigurable beam. A compact switched array of two IDC-CSIWs is demonstrated to produce a continuous full sector coverage of 120° in the azimuth plane, and ±15° in the elevation plane, providing a 2D beam-steer with a stable gain of ~13.5 dBi and an efficiency greater than 80%.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

IEEE Transactions on Antennas and Propagation

Volume

70

Issue

12

Pages

11761 - 11770

Publisher

Institute of Electrical and Electronics Engineers (IEEE)

Version

  • AM (Accepted Manuscript)

Rights holder

© IEEE

Publisher statement

© 2022 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

Acceptance date

2022-09-21

Publication date

2022-10-06

Copyright date

2022

ISSN

0018-926X

eISSN

1558-2221

Language

  • en

Depositor

Prof Will Whittow. Deposit date: 22 December 2022

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