High probability of intercept radar detector

A detector for detecting continuous wave police radar comprising:

• an antenna configured to receive an input signal, the input signal comprising a continuous wave emission within at least one radar band;
• a diplexer in communication with the antenna to separate the input signal into a high-band signal having a first range of frequencies and a low-band signal having a second range of frequencies, the second range of frequencies less than the first range of frequencies;
• a local oscillator configured to sweep through a range of frequencies from a first frequency to a second frequency in a predetermined time period to produce a signal FLO;
• a frequency multiplier in communication with the local oscillator signal to generate a first mixing signal with a frequency that is a positive, integer multiple of FLO;
• a high-band first-stage mixer configured to mix the first mixing signal with the high-band signal to produce a high-band intermediate-frequency signal;
• a low-band first-stage mixer configured to mix the signal FLO with the low-band signal to produce a low-band intermediate-frequency signal;
• a switch coupled with the high-band first-stage mixer and the low-band first-stage mixer, configured to select one of the high-band intermediate frequency signal and the low-band-frequency signal as an output intermediate-frequency signal;
• a second-stage mixer in communication with the switch configured to mix the output intermediate-frequency signal with the signal FLO to generate an output signal FO;
• and
• a signal analyzer configured to determine whether the input signal received by the antenna includes a police radar signal based on the output signal FO.