Slotted Waveguide Antenna Arrays for Airborne Radars

This paper presents a review of recent activities on the development of X-, K u -, and K a -band slotted waveguide antennas. Potential applications of the antennas include various airborne radars systems. We illustrate the implementation of the antennas into a helicopter collision avoidance and weather radar, a surveillance and tracking radar, and an airborne SAR system. The corresponding design solutions, antenna and radar characteristics are discussed as well.