Antennas

摘要

A radar antenna includes a box horn radiator 1 which is capable of simultaneously transmitting X band and S band signals. The S band signals are transmitted as a resultant of the TE01 and TE03 mode, which is generated within the box horn. Additionally, the X band frequencies are fed into an off-set input port 3, which launches the X band signal as a surface wave. By position the box horn at the focus of a reflector, azimuth pointing errors are prevented but different elevation patterns are produced.