Wide band waveguide fed linearly polarized MM wave omnidirectional antenna

Present paper details the design, simulation, and optimization of a waveguide fed linearly polarized omni-directional antenna at millimeter wave frequency. The proposed antenna is λ/4 monopole antenna which is fed by standard rectangular waveguide WR-28. The antenna consists of a radiating metallic pin, circular ground plane, rectangular waveguide and Teflon radome. Finite element method based ANSYS's HFSS electromagnetic simulator tool has been used for design analysis of the antenna. TE10 dominant mode of rectangular waveguide has been used to generate required radiation pattern. The radiation pattern of the antenna depends on metallic pin size and its position in a waveguide. The antenna has 360 degree coverage in the azimuth plane and −5 to 60 degree in the elevation plane. The proposed antenna is low profile, light weight, wide band, low cost and easier to fabricate. The antenna has the 17% impedance bandwidth. The simulated peak gain of the antenna is 2.8 ± 0.5 dBi over the frequency range 32 to 37 GHz.