The SemaLink Hemispherical Antenna from CTech is a Satellite Antenna that has an antenna gain of more than -2.5 dBi and a VSWR of 1.119:1. It has RHCP/LHCP circular polarization via integrated septum polarizers and an axial ratio of less than 2 dB. This hemispherical antenna has an isolation of more than 25 dB between input ports and features a low return loss with structural mass optimization for optimum solutions. It is made up of Aluminium 6061-T6 and incorporates a bracket design according to pointing and mounting requirements. The antenna is designed for geostationary satellites and is responsible for receiving RF signals sent from the ground or transmitting RF signals generated on board using the transmitters to the ground.
