Design of Monopulse Array Antenna With A New Open-End Waveguide Structure

This paper describes a novel design of monopulse array antenna with open-end rectangular waveguide structures at K-band. The double short-circuit block structure of open-end waveguide is a miniaturized vertical structure which used as the radiator element, and overcomes the disadvantages of traditional waveguide slot antenna such as high machining precision requirement. In addition, the partition technology used to widen relative bandwidth (VSWR<2) to 4.7%, and the antenna adopts the Taylor synthesis algorithm to realize the low sidelobe character, the validity of the method is confirmed by calculation and computer simulation, the maximum gain is 27dBi and the side-lobe lever is less than -25.2dB, which can be very useful for radar application.