Antennasby SATELAntennas for SATELLINE Radio Modems We can offer following antenna types for your solutions: Half Wave Antennas for frequencies 400 ... 470 MHz and for 869 MHz (for SATELLINE-1870 and -1870E modems) for short distances Quarter Wave Antennas for frequencies 400 ... 470 MHz, for 869 MHz (for SATELLINE-3AS 869 modems) and for 135 ... 174 MHz (for SATELLINE-3AS VHF modems) for short distances Helix Antennas for frequencies 400 ... 470 MHz and for 135 ... 174 MHz (for SATELLINE-3AS VHF modems) for short distances Directional Antennas for frequencies 330 ... 470 MHz, for 869 MHz (for SATELLINE-3AS 869 modems) and for 135 ... 174 / 218 ... 238 MHz (for SATELLINE-3AS VHF modems) for long distances Omnidirectional Antennas for frequencies 330 ... 470 MHz, for 869 MHz (for SATELLINE-3AS 869 modems) and for 135 ... 174 / 218 ... 238 MHz (for SATELLINE-3AS VHF modems) for long distances. Please check the antenna selectors list in order to get information of different antenna types.