A 2-Layer Solution for 45° Slant Polarized Slotted Waveguide Arrays in Gapwaveguide Technology

A 45° slant polarized radar antenna is designed using gapwaveguide technology. Using slant polarization in radar antennas is beneficial for collision avoidance applications as interference from opposing radars can be reduced. With a curved distribution network, the design complexity of the radiation layer is low allowing for easy fabrication. The element design consists of 4 slanted slots and is implemented in an array resulting in a realized co-polarized gain of 17.18 dBi averaged over the 76-81 GHz frequency band, and can scan to <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\pm 50^{\circ}$</tex> in the azimuth plane.