The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 19, 2002
Filed:
May. 04, 1998
Simon Verghese, Charlestown, MA (US);
K. Alexander McIntosh, Groton, MA (US);
Massachusetts Institute of Technology, Cambridge, MA (US);
Abstract
A transceiver for transmitting and receiving high frequency radiation is described. The transceiver includes a first light source that generates radiation at a first frequency and a second light source that generates radiation at a second frequency. The first and the second light source have a difference frequency that is approximately equal to the difference between the first and the second frequencies. The transceiver also includes a transmitter that comprises a first photomixer that is optically coupled to the first and the second light source. A first antenna that radiates a signal at the difference frequency is electrically coupled to the first photomixer. The transceiver also includes a receiver that comprises a second antenna positioned to receive the signal radiated by the first antenna. The second antenna generates a time varying voltage in response to the signal. A second photomixer is electrically coupled to the second antenna and optically coupled to the first and the second light source. The second photomixer generates a current signal in response to the time varying voltage generated by the second antenna.