To provide continuous coverage across the operating bandwidth, the Q107-4 has been designed around a loaded cavity. This cavity is loaded with microwave absorbing material, which is carefully selected and screened to ensure each unit amplitude tracks a standard (reference) unit. A tapered microstrip transmission line is utilized to properly feed the radiating element for LHCP generation.
Similar in design to the Q21-2 antenna, the Q107-4 features design enhancements to increase the usable bandwidth. These design enhancements include a shaped lens integrated with the dielectric radome and a ferrite sleeve integrated into the balun assembly.
The Q107-4 provides a nominal 100° 3 dB beamwidth and a VSWR of less than 2.0:1.
