D-band ±45° Slant Polarized All-Metal Antenna

New generation of wireless devices calls for new antennas with low cost and high performance. This paper presents a D-band metallic resonant cavity antenna fed by a 45° inclined standard rectangular waveguide to achieve 45° slant linear polarization. The directivity of the waveguide feed can be increased without using a complex fed network. The radiation pattern of the resultant antenna is optimized to have a wide beamwidth in the horizontal plane. In addition to the 45° linear polarization operation, we show preliminary results of ± 45° linear polarization by employing two antenna elements side by side.