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Dual-port circularly polarized dielectric resonator–based antenna with reconfigurable integrated multifunctional filter for 5G cognitive radio applications

Published online by Cambridge University Press:  08 March 2024

Yajush Rai ,
Deepak Sigroha ,
Krishna Tyagi ,
Gourab Das  and
Anand Sharma Open the ORCID record for Anand Sharma [Opens in a new window]
Yajush Rai
Affiliation:
Department of Electronics & Communication Engineering, Motilal Nehru National Institute of Engineering & Technology Allahabad, Prayagraj, Uttar Pradesh, India
Deepak Sigroha
Affiliation:
Department of Electronics Engineering, Rajkiya Engineering College, Sonbhadra, Uttar Pradesh, India
Krishna Tyagi
Affiliation:
Department of Electronics & Communication Engineering, Motilal Nehru National Institute of Engineering & Technology Allahabad, Prayagraj, Uttar Pradesh, India
Gourab Das
Affiliation:
Department of Electronics & Communication Engineering, Punjab Engineering College, Chandigarh, India
Anand Sharma*
Affiliation:
Department of Electronics & Communication Engineering, Motilal Nehru National Institute of Engineering & Technology Allahabad, Prayagraj, Uttar Pradesh, India
*
Corresponding author: Anand Sharma; Email: anandsharma@mnnit.ac.in
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Abstract

In this paper, the design of a circularly polarized (CP) multiple-input–multiple-output (MIMO) antenna system is presented, utilizing a dielectric resonator (DR). This presented antenna system is subsequently integrated with a multifunctional filter, all meticulously structured on a single substrate. The multifunctional filter operates in three modes: reconfigurable band-pass and band-reject filter as well as all-pass filter. The overall structure works as a tunable filtenna. The designed filtenna is expanded into a two-port MIMO system on a unified substrate, providing strong port isolation below −28.5 dB. The overall dimension of proposed radiator is 180 × 180 × 1.6 mm3. The value of peak gain is 5.19 dBic. By switching the states of PIN diodes, the designed filtenna operates as a sensing and communicating antenna for interweave and underlay cognitive radios (CRs). The proposed antenna supports the CP waves within the working band, i.e., 3.6–4.5 GHz. The simulated results are validated by comparing them with the measured results showing less variation among them. MIMO parameters, including the envelope correlation coefficient and diversity gain, have been calculated for the proposed filtenna, representing its suitability for 5G-CR applications.

Keywords

circular polarizationcognitive radiodielectric resonator antennaMIMO antenna
Type
Research Paper
Information
International Journal of Microwave and Wireless Technologies , First View , pp. 1 - 10
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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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