New Approach to Suppress Mutual Coupling Between Longitudinal-Slotted Arrays Based on SIW Antenna Loaded with Metal-Fences Working on VHF/UHF Frequency-Bands: Study, Investigation, and Principle

Alibakhshikenari, Mohammad; Virdee, Bal Singh; Khalily, Mohsen; See, Chan Hwang; Abd-Alhameed, Raed; Falcone, Francisco; Limiti, Ernesto

Abstract

In this work it is demonstrated that substrate integrated waveguide longitudinal slotted array antenna (SIWLSAA) which is loaded with metal fences exhibits highisolation across VHF/UHF bands. A reference SIWLSAA used for comparison purpose comprises of 3×6 slotted arrays constructed on the top and bottom sides of the FR-4 lossy substrate has maximum isolation of -63 dB between its radiation slots. Improvement in isolation is demonstrated using a simple new technique based on inserting a metal fence between each row of slot arrays. The resulting isolation is shown to be is better than -83 dB across 200 MHz to 1.0 GHz with gain greater than 1.5 dBi, and side-lobe level less than - 40 dB. The proposed SIWLSAA is compact and has dimensions of 40×10×5 mm3 (0.026λ 0 ×0.006λ 0 ×0.002λ 0 ) where λo is 200 MHz. The proposed structure should find application in multiple-input multiple-output (MIMO) and radar systems.

• Presentation Conference Type: Conference Paper (Published)
• Conference Name: 2018 Asia-Pacific Microwave Conference (APMC)
• Start Date: Nov 6, 2018
• End Date: Nov 9, 2018
• Acceptance Date: Aug 13, 2018
• Online Publication Date: Jan 17, 2019
• Publication Date: 2018-11
• Deposit Date: May 27, 2019
• Publisher: Institute of Electrical and Electronics Engineers
• Pages: 1564-1566
• ISBN: 9784902339451
• DOI: https://doi.org/10.23919/APMC.2018.8617580
• Keywords: Substrate Integrated Waveguide (SIW) , slotted array antenna , reduction mutual coupling , metal fences , isolation , multiple output multiple input (MIMO) systems
• Public URL: http://researchrepository.napier.ac.uk/Output/1830524