The M2 300-400-12 Helix antenna offers performance characteristics for specialized fixed and rapid deploy operations within 300-400 MHz band. It is perfect for either terrestrial or satellite applications. The antenna is shipped with the helix assembled less ground plane. Finishes are optional. Optional arrays of 2 or more are available. Other frequency ranges and gains are also available down to 100 MHz. Complete motorized, computer controlled AZ-EL systems are also manufactured by M2. Where circular polarity is not required but high bandwidth is, M2 offers a line of various log periodic antennas from 5 to 1300 MHz. If it is antenna related, we probably have made it. Call us with your requirements.