Abstract

A pendulum-like shape with a variable slot ground plane is presented for defense and satellite communication. The substrate used is FR-4 with the overall dimensions of 13*13*1.5 cubic millimeters. This structure design is fed by a 50Ω line. This antenna has a low reflection coefficient starting from 4.1 to 12 GHz. The fractional bandwidth of the antenna is 97.02 % with stable radiations. The antenna's maximum gain stands at 2.2 dB and the antenna's efficiency stands at 77% respectively. The suggested structure is size efficient, lightweight. Hence, it can be used for satellite communication (4.16-6 GHz and 8–12 GHz) with defense communication.

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