Compact single-varactor diode frequency-reconfigurable microstrip patch antenna

Mahmoud Al Ahmad; Saifudeen Kabeer; Ala Abu Sanad; Lillian J.A. Olule

doi:10.1049/mia2.12117

Compact single-varactor diode frequency-reconfigurable microstrip patch antenna

Mahmoud Al Ahmad, Saifudeen Kabeer, Ala Abu Sanad, Lillian J.A. Olule

Department of Electrical and Communication Engineering

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

Abstract

A single-varactor frequency-reconfigurable microstrip patch antenna is presented. The antenna comprises a symmetrical arrangement of four metallised patches coupled and interconnected via slots and metallic bars, respectively. The antenna structure is excited through a single feed probe connected to one of the patches. To achieve a compact size of 22 × 21 × 1.57 mm, a shorting pin is placed close to the feed point to pull down the antenna's resonant frequency. By adding a varactor diode at the centre of the patch, frequency reconfigurability is introduced. Variation in the varactor's DC reverse bias voltage from 0 to 7.5 V results in a corresponding resonant frequency shift from 1000 to 1150 MHz, thus providing a tuning range of 15%. The proposed design is compact and achieves frequency reconfiguration with a single-varactor diode and a low bias voltage requirement compared with the design characteristics reported in existing works. The antenna can find application in various existing and emerging communication systems.

Original language	English
Pages (from-to)	1100-1107
Number of pages	8
Journal	IET Microwaves, Antennas and Propagation
Volume	15
Issue number	9
DOIs	https://doi.org/10.1049/mia2.12117
Publication status	Published - Jul 29 2021

ASJC Scopus subject areas

Electrical and Electronic Engineering

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10.1049/mia2.12117

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abstract = "A single-varactor frequency-reconfigurable microstrip patch antenna is presented. The antenna comprises a symmetrical arrangement of four metallised patches coupled and interconnected via slots and metallic bars, respectively. The antenna structure is excited through a single feed probe connected to one of the patches. To achieve a compact size of 22 × 21 × 1.57 mm, a shorting pin is placed close to the feed point to pull down the antenna's resonant frequency. By adding a varactor diode at the centre of the patch, frequency reconfigurability is introduced. Variation in the varactor's DC reverse bias voltage from 0 to 7.5 V results in a corresponding resonant frequency shift from 1000 to 1150 MHz, thus providing a tuning range of 15%. The proposed design is compact and achieves frequency reconfiguration with a single-varactor diode and a low bias voltage requirement compared with the design characteristics reported in existing works. The antenna can find application in various existing and emerging communication systems.",

author = "{Al Ahmad}, Mahmoud and Saifudeen Kabeer and Sanad, {Ala Abu} and Olule, {Lillian J.A.}",

note = "Funding Information: This work was supported by funds from National Space Science and Technology Centre, UAE University. Many thanks go for Dr Khaled Al Hashmi (Centre Director) and Dr Omar Imam (Centre technical leader) for their continuous help and support. The authors wish to acknowledge the help received from Eng. Mutaz during the fabrication process of the antenna. This work was supported by funds from National Space Science and Technology Centre, UAE University. Publisher Copyright: {\textcopyright} 2021 The Authors. IET Microwaves, Antennas & Propagation published by John Wiley & Sons Ltd on behalf of The Institution of Engineering and Technology.",

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N1 - Funding Information: This work was supported by funds from National Space Science and Technology Centre, UAE University. Many thanks go for Dr Khaled Al Hashmi (Centre Director) and Dr Omar Imam (Centre technical leader) for their continuous help and support. The authors wish to acknowledge the help received from Eng. Mutaz during the fabrication process of the antenna. This work was supported by funds from National Space Science and Technology Centre, UAE University. Publisher Copyright: © 2021 The Authors. IET Microwaves, Antennas & Propagation published by John Wiley & Sons Ltd on behalf of The Institution of Engineering and Technology.

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N2 - A single-varactor frequency-reconfigurable microstrip patch antenna is presented. The antenna comprises a symmetrical arrangement of four metallised patches coupled and interconnected via slots and metallic bars, respectively. The antenna structure is excited through a single feed probe connected to one of the patches. To achieve a compact size of 22 × 21 × 1.57 mm, a shorting pin is placed close to the feed point to pull down the antenna's resonant frequency. By adding a varactor diode at the centre of the patch, frequency reconfigurability is introduced. Variation in the varactor's DC reverse bias voltage from 0 to 7.5 V results in a corresponding resonant frequency shift from 1000 to 1150 MHz, thus providing a tuning range of 15%. The proposed design is compact and achieves frequency reconfiguration with a single-varactor diode and a low bias voltage requirement compared with the design characteristics reported in existing works. The antenna can find application in various existing and emerging communication systems.

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Compact single-varactor diode frequency-reconfigurable microstrip patch antenna

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