C-Band Rectangular Dra With Defective Ground Structure for Satellite Uplink Applications

Abstract

The C-band RDRA with a defective ground structure operated at resonant frequency 6.2 GHz is best suitable for satellite uplink applications. In the C-band, the broad aperture slot and pentagonal-shaped defective ground structure (DGS) offer excellent isolation and great efficiency. The simple prototype of designed pentagonal DGS RDRA is fabricated, tested, and validated. The proposed C-band RDRA has a fractional bandwidth of 12.14%, a return loss of −30 dB, a gain up to 7.95 dB, and a minimal VSWR at the resonance frequency of 6.2 GHz. It offers a broad beamwidth of 110.87 • in the E-plane, 43.73 • in the H-plane, and 91.5% efficiency.