Isolation enhancement of densely packed array antennas with periodic MTM‐photonic bandgap for SAR and MIMO systems. Issue 3 (19th December 2019)

• Record Type: Journal Article
• Authors: Alibakhshikenari, Mohammad; Virdee, Bal S.; Shukla, Panchamkumar; See, Chan H.; Abd‐Alhameed, Raed A.; Falcone, Francisco; Quazzane, Karim; Limiti, Ernesto
• Is Part Of: IET microwaves, antennas & propagation. Volume 14:Issue 3(2020)
• Page Start: 183
• Page End: 188
• Publication Date: 2019-12-19
• Subjects: periodic structures -- microstrip antennas -- synthetic aperture radar -- metamaterials -- photonic band gap -- MIMO communication; transmit–receive sections -- synthetic aperture radar -- multiple‐input–multiple‐output -- MTM‐PBG structure -- surface wave propagations -- MTM‐PBG layer -- periodic arrangement -- cross‐shaped microstrip frame -- noise figure 12.0 dB -- frequency 9.25 GHz -- frequency 9.25 GHz to 11.0 GHz -- decoupling frame -- metamaterial photonic bandgap periodic structure -- periodic MTM‐photonic bandgap -- densely packed array antenna -- isolation enhancement -- array antennas -- three‐dimensional metal walls -- short‐circuited via‐holes; Microwaves -- Periodicals; Microwave antennas -- Periodicals; Antennas (Electronics) -- Periodicals; Radio wave propagation -- Periodicals; Microwave communication systems -- Periodicals; 621.381305
• DOI: 10.1049/iet-map.2019.0362
• Languages: English
• ISSNs: 1751-8725

Abstract

Abstract : 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 the 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 12 dB. 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 three‐dimensional 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 (9.25–11 GHz) with a fractional bandwidth 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 λ at 9.25 GHz.