This antenna provides exceptional gain via a digitally tuned element in the 30-174 MHz band combined with a passive UHF element, co-located within a single, high strength fiberglass radome. Unique radiating element design ensures excellent patterns over the complete frequency range and provides continuous and simultaneous reception of 121.5, 156.8, 243 and 406 MHz guard channels irrespective of antenna tuning between 118-512 MHz.

Many years of experience in designing solid-state tuned antennas has enabled CAL’s team to provide the ultimate in performance and reliability for a frequency agile airborne blade. Close attention to environmental and EMI design considerations combined with latest composites structural technology makes the 21-150-18 suitable for helicopters and subsonic aircraft. This antenna includes a lightning protection scheme whereby internal metal elements are high voltage insulated such that diverters on the outer radome surface attached to the isolated aluminum top plate cause local ionisation and lead the strike to airframe.

The separate logic converter unit combines FPGA embedded flash memory technology with MIL spec’d power supply in a MIL-STD-461 compliant package. LCU’s can be provided for most current generation digital transceivers which should be specified when ordering.