Patent ID: 8275334

Claim:
An apparatus for remotely locating solid-state electronics, comprising in combination: an RF generator for generating a chosen frequency RF signal; a signal splitter for dividing the RF signal into a transmitted portion and a reference portion; a modulator for encoding a chosen code onto the transmitted portion of the RF signal; a controller for generating the chosen code, and for directing the code to said modulator; a power amplifier for amplifying the encoded RF signal; an antenna for transmitting the amplified, encoded RF signal; an antenna for receiving a similarly encoded second harmonic frequency of the encoded RF signal; a demodulator for receiving the second harmonic frequency and the chosen code delayed by a selected time interval from said controller, and for removing the modulation from the second harmonic frequency; a frequency doubler for doubling the frequency of the reference portion of the RF signal; a mixer for comparing the doubled frequency of the reference portion of the RF signal with the demodulated second harmonic frequency, and for generating a DC signal if the doubled frequency of the reference portion of the RF signal is correlated with the demodulated second harmonic frequency; and a computer for receiving the DC signal, for directing said controller and for calculating distance between located solid-state electronics and said transmitting antenna.