Patent ID: 6348683
Filing Date: 2002-02-19
Classification: G01N,H01L

Abstract:
A transceiver comprising:a) a first light source generating radiation at a first frequency; b) a second light source generating radiation at a second frequency, the first and the second light source having a difference frequency approximately equal to the difference between the first and the second frequencies; c) a transmitter comprising: i) a first photomixer optically coupled to the first light source and the second light source; and ii) a first antenna electrically coupled to the first photomixer, the first antenna radiating a signal having a frequency substantially equal to the difference frequency; and d) a receiver comprising: i) a second antenna positioned to receive the signal radiated by the first antenna, the second antenna generating a time varying voltage in response to the signal; and ii) a second photomixer electrically coupled to the second antenna and optically coupled to the first and the second light source, the second photomixer generating a current signal in response to the time varying voltage generated by the second antenna.