Cassegrain antennas are offered with a 6”, 12”, 18”, 24”, 36” and 48” diameter main reflector dish. These antennas are designed and manufactured with the highest performance and quality. The main advantages of the Cassegrain antenna are its low loss, low profile and light weight compared to other high gain antennas, such as prime focus and lens corrected antennas. As a downside, this antenna has relatively high side lobe levels compared to other antennas due to the interference of the sub-reflector’s supporting structure. To ensure good performance, the supporting structures are specially designed to keep side lobe levels under 18 dB for narrow band operations and under 16 dB for broadband operation. The standard offering covers the frequency range of 18 to 110 GHz, but custom frequencies can be requested. The operating bandwidth of these antennas is mainly limited by the circular waveguide’s dominant mode operation. While standard models are equipped with a circular waveguide interface, a rectangular waveguide interface is also available.