Patent ID: 7782250
Filing Date: 2010-08-24
Classification: G01S

Abstract:
1. A millimeter wave radar target simulation system comprising: a down-converter configured to receive a millimeter wave radar signal and convert the radar signal to a down-converted signal having an intermediate frequency; an electrical-to-optical modulator in signal communication with the down-converter, the electrical-to-optical modulator configured to modulate an optical signal based on the down-converted signal; an optical-to-electrical demodulator configured to demodulate the optical signal to an electrical signal having an intermediate frequency; an optical delay line in signal communication with the electrical-to-optical modulator and the optical-to-electrical demodulator, the optical delay line serving to delay a signal passing from the electrical-to-optical modulator to the optical-to-electrical demodulator; an up-converter in signal communication with the optical-to-electrical demodulator, the up-converter configured to convert the electrical signal from the optical-to-electrical demodulator to an up-converted signal having a frequency that simulates a millimeter wave radar target return; a first coupler situated between the down-converter and the electrical-to-optical modulator; and a second coupler situated between the optical-to-electrical demodulator and the up-converter, the second coupler in signal communication with the first coupler, wherein the second coupler is configured to direct a portion of the electrical output signal from the optical-to-electrical demodulator to the first coupler and also to allow the signal from the optical-to-electrical demodulator to pass through to the up-converter and wherein the first coupler is configured to allow both the down-converted signal from the down-converter and the signal from the second coupler to pass to the electrical-to-optical modulator.