Patent ID: 7756503

Claim:
A high frequency module for FM-CW radar comprising: an oscillator for outputting a high frequency modulating signal; a power divider for dividing power of an output of said oscillator; a multiplier for doubling a frequency of one output of said power divider and outputting a transmitting signal; a switch having a number of channels corresponding to a plurality of waveguides obtaining receiving signals and capable of selecting one of the waveguides; and an even harmonic high frequency mixer for outputting a video signal having frequencies of a sum and a difference of the doubled frequency of another output of said power divider and an output frequency of said switch, said even harmonic high frequency mixer comprising a built-in anti-parallel diode pair that connects in parallel two diodes of reverse polarity, wherein said oscillator, power divider, multiplier, switch, and even harmonic high frequency mixer are mounted within said high frequency module.