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Substrate integrated waveguide differential antenna for full duplex applications

Published online by Cambridge University Press:  15 November 2024

Gunjan Srivastava Open the ORCID record for Gunjan Srivastava [Opens in a new window]  and
Shalini Singh Open the ORCID record for Shalini Singh [Opens in a new window]
Gunjan Srivastava*
Affiliation:
Department of Electronics and Communication Engineering, Graphics Era (Deemed to be) University, Dehradun, India
Shalini Singh
Affiliation:
Department of Electronics and Communication Engineering, Graphics Era (Deemed to be) University, Dehradun, India
*
Corresponding author: Gunjan Srivastava; Email: [email protected]
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Abstract

This paper presents a substrate-integrated waveguide (SIW) differential antenna for full duplex applications. The proposed antenna consists of two square SIW cavities named as outer and inner. The inner cavity is nested into the outer cavity. The outer cavity is differentially excited with a pair of coaxial feed lines, while the inner square patch is orthogonally excited with another pair of differential coaxial feed lines. This orthogonal feeding arrangement results in high isolation between the differential ports. The modified hybrid TE130/310 mode of the outer cavity radiates through a pair of arc-shaped slots at 9.35 GHz, while the TM01 mode of the inner square patch is responsible for the radiations at 8.65 GHz. The proposed antenna prototype is fabricated and measured for validation. Moreover, the designed antenna has a front-to-back ratio better than 22 dB and measured maximum gain values of 6.1 dBi and 7.6 dBi at 8.65 GHz (Port 2 ON) and 9.35 GHz (Port 1 ON), respectively.

Keywords

differentialfull duplexSIWslot antenna (SA)
Type
Research Paper
Information
International Journal of Microwave and Wireless Technologies , Volume 16 , Issue 9 , November 2024 , pp. 1540 - 1546
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Copyright
© The Author(s), 2024. Published by Cambridge University Press in association with The European Microwave Association.

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