Abstract
A wideband, high gain and low profile elliptically slotted ground aperture coupled antenna is proposed to cover Ku band satellite communication (SatCom) applications. A single antenna spanning over both transmitter and receiver bands brings significant advantages in terms of reducing the size, the weight, and the complexity of communication front-end. The antenna is composed of one elliptical slot on the ground plane, a radiating patch, and a parasitic patch element. Antenna performance shows that 6.2 GHz bandwidth can be achieved from 9.5 to 15.7 GHz which covers the entire Ku-band satellite communication frequencies and a portion of X-band. The fractional bandwidth of the antenna is 49% for a return loss greater than 10 dB. Simulation results indicate that proposed antenna achieves 9.2 dBi peak gain at 12.4 GHz and broadside gain no less than 7.8 dBi over the entire Ku-band uplink and downlink frequency bands. Proposed antenna E-plane and H-plane sidelobe levels are (SLL) -9.2 dB and -11.4 dB, respectively. Half power beamwidths (HPBW) are 72° in the E-plane and 48° in the H-plane at 12.5 GHz, respectively. Due to its wideband and high-gain features, the antenna has the potential for integration to SatCom antenna arrays.
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