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A wideband dual polarized in-band full duplex antenna with higher order modes suppression

Published online by Cambridge University Press:  02 April 2025

Sandeep Rana ,
Amit Kumar  and
Akhilesh Mohan Open the ORCID record for Akhilesh Mohan [Opens in a new window]
Sandeep Rana
Affiliation:
Department of Electronics and Communication Engineering, Indian Institute of Technology Roorkee, Roorkee, India Department of Electronics and Communication Engineering, G.B. Pant Institute of Engineering and Technology, Pauri Garhwal, India
Amit Kumar
Affiliation:
Department of Electronics and Communication Engineering, Indian Institute of Technology Roorkee, Roorkee, India
Akhilesh Mohan*
Affiliation:
Department of Electronics and Communication Engineering, Indian Institute of Technology Roorkee, Roorkee, India
*
Corresponding author: Akhilesh Mohan; Email: [email protected]
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Abstract

This paper presents a wideband dual-polarized in-band full duplex antenna which can also suppress the higher order modes. A dual differential capacitive feeding scheme is proposed to increase the isolation between the co-located transmitter and receiver ports. The proposed design uses λ/4 resonators in close vicinity of the radiating patch to provide spurious-free characteristics. Further, a parasitic patch placed above the radiating patch at height “h” is used to enhance the input matching, impedance bandwidth, and gain of the proposed design. The key features of the proposed structure are its wide impedance bandwidth (∼20%), high inter-port isolation (>58 dB) throughout the entire operating frequency range (2.26–2.76 GHz), and simultaneous suppression of higher order modes which makes it a suitable candidate for modern wireless application. Finally, a prototype is fabricated and measurement results are in good agreement with simulation results.

Keywords

differential patch antennadual polarizedhigher order modes suppressionin-band full duplex (IBFD)
Type
Research Paper
Information
International Journal of Microwave and Wireless Technologies , First View , pp. 1 - 11
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Copyright
© The Author(s), 2025. Published by Cambridge University Press in association with The European Microwave Association.

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