Millimeter wave radar for millimter wave/infrared dual mode sensor

A Ka-band millimeter wave radar system for one special configured millimeter wave and infrared dual mode sensor is developed. It employs stepped frequency and pulse doppler signal waveforms so that it can detect both stationary targets and moving targets. It adopts special microstrip array antenna with central aperture, four channel transmit/receive module and RF monopulse comparator. It can achieve higher transmit gain and accomplish lower noise figure and higher receiver sensitivity. Furthermore, the experiment results are given which indicate that the dual mode sensor can be applied to short range seeker.