Array Antenna for Synthetic Aperture Radar Operating in X and Ku-Bands: A Study to Enhance Isolation Between Radiation Elements

Alibakhshikenari, Mohammad; Limiti, Ernesto; Virdee, Bal S.; See, Chan H.; Abd-Alhameed, Raed A.; Falcone, Francisco

Abstract

Modern synthetic aperture radars (SAR) require a system bandwidth of greater than 1 GHz. Waveguide slot antennas are popular for use in SAR applications because of their inherent advantages, namely high efficiency and power handling capability, but such antennas have a limited bandwidth. Although the bandwidth of slot antennas can be broadened by using ridge waveguides however this approach introduces manufacturing complexity and is costly. A novel solution is presented in this paper to realise a large bandwidth by using 2x3 array antenna where the mutual coupling between the radiating elements is suppressed by inserting an isolation wall between the radiating elements. The isolation wall comprises three intercoupled U-shaped microstrip transmission-lines. With this technique the antenna’s bandwidth for VSWR>1.5 is greater than 2 GHz inside the X- and Ku-bands.

Citation

Alibakhshikenari, M., Limiti, E., Virdee, B. S., See, C. H., Abd-Alhameed, R. A., & Falcone, F. (2018). Array Antenna for Synthetic Aperture Radar Operating in X and Ku-Bands: A Study to Enhance Isolation Between Radiation Elements.

• Conference Name: 12th European Conference on Synthetic Aperture Radar (EUSAR)
• Conference Location: Aachen, Germany
• Start Date: Jun 4, 2018
• End Date: Jun 7, 2018
• Acceptance Date: Apr 9, 2018
• Publication Date: Jun 8, 2018
• Deposit Date: May 27, 2019
• Pages: 1-5
• ISBN: 9783800746361
• Keywords: synthetic aperture radars (SAR); slot antenna; array antenna
• Public URL: http://researchrepository.napier.ac.uk/Output/1830639
• Publisher URL: https://www.vde-verlag.de/books/454636/eusar-2018.html