volume | PIER Journals

Abstract

This paper aims to design and analyze a tri-band Differential Shifted-Feed Microstrip Grid Array Antenna (DSF-MGAA) with eight parasitic elements to achieve better return loss and isolation characteristics and improved antenna gain at various frequency ranges in the Golden band, X-band and Ku band. The non-uniform grid element is excited through two 180-degree out-of-phase signal-carrying feed lines with the LC matching network to provide better impedance matching. The antenna provides a minimum peak return loss of -17.88 dB, -27.13 dB and -26.7 dB at 7 GHz, 9 GHz and 12.2 GHz. Measured results show a good agreement with the simulated results. Parasitic elements incorporated provide a maximum gain of 17.2 dBi. The results confirm that the proposed antenna suits for high-frequency applications such as 6G communication, Space and Defense application and VSAT (Very Small Aperture Terminal) networks.

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Dr. Rajamohan Varun Prakash

Dr. Jeyagobi Logeswaran

Dr. Atham Mohamed Mahin Ayas

Dr. Pandurangan Sridhar