TERK SIRIUS Satellite Radio aftermarket antennas are designed to be installed easily and feature a low-profile design. A SIRIUS splitter allows you to use the newer. smaller antennas with older SIRIUS dual-input receivers and we have an extension cable for longer cable installations. In addition. our mirror mount bracket allows you to receive SIRIUS Satellite Radio for your truck or RV using the latest modern looking SIRIUS antennas on the market.