The antenna is a parallel-fed, collinear array of two radiating elements enclosed and sealed within an epoxy fiberglass radome for prolonged use in severe marine environments.
The array handles average input powers to 2 kW. It is untuned and operates over its entire frequency range with a VSWR, on 50 ohms, of less than 2.0:1. Maximum signal intensity is directed near the horizon, with a nominal 12° uptilt to minimize the effects of ground reflections. The half-power beam width over the design band is 32° – 36°. Azimuth coverage is omnidirectional to within ±1 dB.
The upper radiator is altered to produce a small horizontal current component. This signal, radiated upward, efficiently fills the overhead cone of silence.
The RF input connector is a coaxial Type LC connector. The connector and a radome purging plug are recessed in the antenna base.
CA-4001 is designed to meet the Shock requirements of MIL-T-17113 and MIL-STD-167, Type I Vibration. It will withstand wind loads to 120 mi/hr; 80 mi/hr with 4.5 lb/ft2 icing.
