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COMMUNICATION APPARATUS FOR COMMUNICATING BETWEEN A FIRST AND A SECOND OBJECT

  • US 3,839,717 A
  • Filed: 01/28/1972
  • Issued: 10/01/1974
  • Est. Priority Date: 01/28/1972
  • Status: Expired due to Term
First Claim
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1. A communication apparatus for providing communication between a first object and a second object, comprising:

  • means in the first object generating and transmitting a transmit signal;

    means in the second object receiving the transmit signal and providing an emitted signal coherently related to the transmit signal in response to the received transmit signal, comprising;

    a receiver receiving the transmit signal and providing an output signal having a frequency coherently related to the frequency of the received transmit signal;

    an identification encoder connected to the receiver and receiving the receiver output signal, the identification encoder having a predetermined code and providing an output signal indicative of the predetermined code in response to the receiver output signal;

    a signal controller receiving the receiver output signal and the identification encoder output signal and encoding the predetermined code in the received receiver output signal providing an encoded emitted signal having a frequency coherently related to the frequency of the transmit signal and encoded with the predetermined code; and

    means in the first object receiving the emitted signal.

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