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Isolation Enhancement of Densely Packed Array Antennas with Periodic MTM-Photonic Bandgap for SAR and MIMO Systems

Alibakhshikenari, Mohammad; Virdee, Bal S.; Shukla, Panchamkumar; See, Chan Hwang; Abd-Alhameed, Raed; Falcone, Francisco; Quazzane, Karim; Limiti, Ernesto


Mohammad Alibakhshikenari

Bal S. Virdee

Panchamkumar Shukla

Raed Abd-Alhameed

Francisco Falcone

Karim Quazzane

Ernesto Limiti


A metamaterial photonic bandgap (MTM-PBG) periodic structure is used as a decoupling frame to improve the isolation between transmit–receive (T/R) sections of densely packed array antenna in synthetic aperture radar (SAR) and multiple-input multiple-output (MIMO) systems. With this technique the MTM-PBG structure is shown to effectively suppress surface wave propagations between the T/R array antennas by an average of 12dB. MTM-PBG layer comprises a periodic arrangement of dielectric circles etched in the cross-shaped microstrip frame that is inserted between the radiating elements. Unlike other recently reported methods, the advantages of the proposed technique are:(i) simplicity; (ii) cost effectiveness as there is no need for short-circuited via-holes or 3D metal walls; and (iii) can be retrofitted in existing array antennas. The proposed T/R array antennas were designed to operate over an arbitrary frequency range (9.25-11GHz) with a fractional bandwidth (FBW) of 17.28%. With this technique (i) the side-lobes are reduced; (ii) there is minimal effect on the gain performance; and (iii) the minimum edge-to-edge gap between adjacent radiating elements can be reduced to 0.15at 9.25GHz.

Journal Article Type Article
Acceptance Date Nov 22, 2019
Online Publication Date Nov 27, 2019
Publication Date Feb 20, 2020
Deposit Date Nov 27, 2019
Publicly Available Date Nov 27, 2019
Print ISSN 1751-8725
Electronic ISSN 1751-8733
Publisher Institution of Engineering and Technology (IET)
Peer Reviewed Peer Reviewed
Volume 14
Issue 3
Pages 183-188
Keywords Metamaterial (MTM), photonic bandgap (PBG), periodic structures, surface wave suppression, isolation, synthetic aperture radar (SAR), multiple-input multiple-output (MIMO)
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Isolation Enhancement Of Densely Packed Array Antennas With Periodic MTM-Photonic Bandgap For SAR And MIMO Systems (1.1 Mb)

Copyright Statement
"This paper is a postprint of a paper submitted to and accepted for publication in IET Microwaves, Antennas and Propagation and is subject to Institution of Engineering and Technology Copyright. The copy of record is available at the IET Digital Library"

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