High gain conical beam antenna with large beam-pointing angle by using hemitorus lens-reflector

In this paper, a high gain conical beam antenna with large beam-pointing angle has been investigated. Total prototype contains a three section circular waveguide aperture antenna which operates in TM03 mode in order to generate a primary conical beam and a new hemitorus lens-reflector as the secondary large aperture radiator. Through optimized design, the gain of 12 dB and a beam-pointing angle of 50° have been achieved at the central frequency of 35 GHz.