Meta-surface wall suppression of mutual coupling between microstrip patch antenna arrays for THz-band applications

Alibakhshikenari, M.; Virdee, B.S.; Shukla, P.; See, C.H.; Abd-Alhameed, R.A.; Falcone, F.J.; Limiti, E.

Abstract

This paper presents a novel 2D meta-surface wall to increase the isolation between microstrip patch radiators in an antenna array that is operating in the teraherz (THz) band of 139-141 GHz for applications including communications, medical and security screening systems. The meta-surface unit-cell comprises conjoined twin `Y-shape' microstrip structures, which are inter-digitally interleaved together to create the meta-surface wall. The proposed meta-surface wall is free of via holes and defected ground-plane hence easing its fabrication. The meta-surface wall is inserted tightly between the radiating elements to reduce surface wave mutual coupling. For best isolation performance the wall is oriented orthogonal to the patch antennas. The antenna array exhibits a gain of 9.0 dBi with high isolation level of less than -63 dB between transmit and receive antennas in the specified THz-band. The proposed technique achieves mutual coupling suppression of more than 10 dB over a much wider frequency bandwidth (2 GHz) than achieved to date. With the proposed technique the edge-to-edge gap between the transmit and receive patch antennas can be reduced to 2.5 mm. Dimensions of the transmit and receive patch antennas are 5×5 mm2 with ground-plane size of 9×4.25 mm2 when being constructed on a conventional lossy substrate with thickness of 1.6 mm.

Citation

Alibakhshikenari, M., Virdee, B., Shukla, P., See, C., Abd-Alhameed, R., Falcone, F., & Limiti, E. (2018). Meta-surface wall suppression of mutual coupling between microstrip patch antenna arrays for THz-band applications. Progress In Electromagnetics Research Letters, 75, 105-111. https://doi.org/10.2528/pierl18021908

• Journal Article Type: Article
• Acceptance Date: Apr 16, 2018
• Publication Date: May 2, 2018
• Deposit Date: Mar 14, 2019
• Publicly Available Date: Mar 18, 2019
• Journal: Progress in Electromagnetics Research Letters
• Print ISSN: 1937-6480
• Peer Reviewed: Peer Reviewed
• Volume: 75
• Pages: 105-111
• DOI: https://doi.org/10.2528/pierl18021908
• Keywords: 2D meta-surface wall, microstrip patch radiators, antenna array,
• Public URL: http://researchrepository.napier.ac.uk/Output/1660336
• Related Public URLs: http://hdl.handle.net/10454/15908.