×

System and method for redirecting a signal using phase conjugation

  • US 6,630,905 B1
  • Filed: 11/10/2000
  • Issued: 10/07/2003
  • Est. Priority Date: 11/10/2000
  • Status: Expired due to Term
First Claim
Patent Images

1. A system for automatically generating a return beam in the direction of a received beam comprising:

  • first means for receiving a first signal having a first frequency and first wavefront from a first direction, wherein said first means is a phased array antenna comprising a plurality of radiating elements;

    second means for providing a second signal having a second wavefront, said second signal being a phase conjugate of said first signal, said second means including a plurality of phase conjugators each of which are coupled to an associated radiating element to receive an input signal therefrom, each of said phase conjugators including a mixer having said input signal as a first input thereto, said input signal having said first frequency and a first phase;

    third means for providing a second input to each of said mixers, said second input being derived from said first signal and being a second signal having a frequency equal to twice said first frequency such that the output of said mixer includes a component representative of the negative of said first phase; and

    fourth means for transmitting said second signal, whereby said second signal is transmitted in a reverse direction relative to the direction of said first signal.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×