A Novel Wide Beam Open-ended Waveguide Antenna

A coaxially fed wide beam open-ended waveguide antenna is proposed in this paper. Based on a conventional open-ended waveguide antenna, wide beam performance can be achieved in the waveguide antenna, which is mainly dependent on a chamfer at the waveguide aperture and a pair of metal stubs along the wide wall of the waveguide. The important design parameters of the antenna have been analyzed in detail. In general, the results show that an impedance bandwidth (|S
₁₁
| <; - 10dB) of 9.6% is achieved at the central frequency 10 GHz. The peak gain is about 4 dB, and the half-power beamwidths (HPBWs) of the H-plane and E-plane are 165° and 208°, respectively.