A Low-Loss W-Band Frequency-Scanning Antenna for Wideband Multichannel Radar Applications

A class of nonresonant slotted waveguide antennas particularly suited for wideband millimeter-wave radar and imaging applications is introduced. Inspired by a variation of the classic narrow-wall leaky structure, it possesses a high degree of design flexibility and is easily integrated into steerable arrays. A reliable manufacturing concept is presented and demonstrated by means of simulations and measurements on a first prototype, complemented by an experimental evaluation of the antenna's in-system performance as part of a frequency-modulated continuous-wave radar.