Design of a Single Offset Conformal Waveguide Slot Antenna

In this paper, a waveguide slot antenna with fixed scan angle is designed for Ka-band. The antenna adopts a single-offset wide-side longitudinal slot as the antenna radiation unit. The amplitude distribution of the radiation aperture is controlled by the slot offset distance and the slot length to achieve low sidelobes; the beam scanning angle is controlled by the waveguide size; the antenna is embedded in the metal shell, the conformal shape between the antenna and the metal shell is realized, and the wide beam in the elevation plane is realized at the same time. The simulation results show that the antenna beam points to -40°; the VSWR is less than 1.1; the antenna gain is greater than 14dBi; the azimuth side lobe is less than -23dB and the elevation plane beam width is greater than 170°.