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Alibakhshikenari, Mohammad, Virdee, Bal Singh, See, Chan, Abd-Alhameed, Raed, Falcone, Francisco and Limiti, Ernesto (2018) Array antenna for synthetic aperture radar operating in X and Ku-Bands: a study to enhance isolation between radiation elements. In: 12th European Conference on Synthetic Aperture Radar, 4-11 June 2018, Aachen, Germany.
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 realize a large bandwidth by using 2×3 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.
Available under License Creative Commons Attribution Non-commercial No Derivatives.
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