Effects of mutual coupling on gain and beam width of a linear array of a dielectric resonator antenna for main beam scanning applications

Nasir, Jamal, Khan, Aftab Ahmed, Khaliq, Shoaib, Qureshi, Muhammad Bilal, Ullah, Irfan, Liu, Leo and Nawaz, Raheel (2022) Effects of mutual coupling on gain and beam width of a linear array of a dielectric resonator antenna for main beam scanning applications. Sensors, 22 (18). p. 6820. ISSN 1424-8220

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Abstract

The effects of mutual coupling on the scanning characteristics of a four-element linear rectangular dielectric resonator antenna array (RDRA) are investigated for different inter-element spacing in this work. In particular, the gain and half-power beam width (HPBW) of an RDRA are studied for various scan angles in the E- and H-plane configurations. It is shown that for both the E and H planes, mutual coupling has an adverse effect on the performance of both phased array configurations. The H-plane array, however, is more stable than the E-plane array in terms of a gain and beam width performance comparison. The HPBW increases and gain decreases more in the E plane than the H plane when the scan angle is increased.