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A compact frequency reconfigurable patch antenna with asymmetric armed U and reversed L slots for handheld wireless devices

Published online by Cambridge University Press:  30 May 2022

Bhaben Saikia Open the ORCID record for Bhaben Saikia [Opens in a new window]  and
Kunal Borah
Bhaben Saikia
Affiliation:
Department of Physics, North Eastern Regional Institute of Science and Technology (Deemed to-be-University), Nirjuli, Itanagar, Arunachal Pradesh 791109, India
Kunal Borah*
Affiliation:
Department of Physics, North Eastern Regional Institute of Science and Technology (Deemed to-be-University), Nirjuli, Itanagar, Arunachal Pradesh 791109, India
*
Author for correspondence: Kunal Borah, E-mail: kbnerist@gmail.com
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Abstract

A frequency reconfigurable microstrip patch antenna with a combination of an asymmetric armed U-slot and a reversed L-slot etched on a rectangular base patch of 6 GHz resonant frequency designed on an FR4 substrate (ɛr = 4.4) is presented in this paper. Three RF PIN diodes are positioned at inimitable sites of these slots to achieve frequency reconfiguration. A DC bias circuitry, which includes DC blocking capacitors and RF blocking inductors, is integrated with the antenna structure for switching (ON/OFF) the PIN diodes. Six reconfigurable modes with resonant frequencies at 4.33, 4.63, 5.24, 5.87, 5.96, and 6.29 GHz is obtained with different ON-OFF combinations of these PIN diodes. These reconfigurable resonant frequencies cover two continuous bands from 4.21 to 5.43 GHz and 5.69 to 6.6 GHz and is considered to be useful for the applications like aeronautical radio navigation (4.3 GHz), sub-6-GHz 5G (4.4–5 GHz), WLAN (5.2 and 5.8 GHz) and Wi-Fi 6E (5.925–6.425 GHz). Measured gain of the antenna for all the modes varies between 5.86 dBi and 8.72 dBi.

Keywords

Frequency reconfigurationPIN diodeSub-6-GHz 5GWi-Fi 6EWLAN
Type
Antenna Design, Modeling and Measurements
Information
International Journal of Microwave and Wireless Technologies , Volume 15 , Issue 4 , May 2023 , pp. 623 - 631
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Copyright
© The Author(s), 2022. Published by Cambridge University Press in association with the European Microwave Association

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