Transponder

• US 3,079,557 A
• Filed: 11/02/1960
• Issued: 02/26/1963
• Est. Priority Date: 11/02/1960
• Status: Expired due to Term

• Current Assignee: Willie A. Crabtree
• Original Assignee: Willie A. Crabtree
• Inventors: Crabtree, Willie A.
• Application Number:
  US04/066,757
• Time in Patent Office: 846 Days
• US Class Current: 342/51
• CPC Class Codes: G01S 13/58 Velocity or trajectory determination systems; Sense-of-movement determination systems
• CPC Class Codes: G01S 13/82 wherein continuous-type signals are transmitted

Claims

1. A TRANSPONDER COMPRISING A RECEIVING ANTENNA, AN OSCILLATOR, A FIRST FREQUENCY MULTIPLIER CONNECTED TO MULTIPLY THE FREQUENCY OF THE OUTPUT SIGNAL OF SAID OSCILLATOR BY A PREDETERMINED FACTOR, A FIRST MIXER CONNECTED TO MIX THE OUTPUT SIGNAL OF SAID FIRST FREQUENCY MULTIPLIER AND THE SIGNAL DETECTED BY SAID RECEIVING ANTENNA, AN IF AMPLIFIER CONNECTED TO AMPLIFY THE DIFFERENCE COMPONENT IN THE OUTPUT SIGNAL OF SAID FIRST MIXER, A FREQUENCY DIVIDER CONNECTED TO DIVIDE THE FREQUENCY OF THE OUTPUT SIGNAL OF SAID IF AMPLIFIER BY SAID PREDETERMINED FACTOR, A SECOND MIXER CONNECTED TO MIX THE OUTPUT SIGNALS OF SAID FREQUENCY DIVIDER AND SAID OSCILLATOR, A FIRST FILTER CONNECTED TO PASS THE SUM COMPONENT AND FILTER OUT THE DIFFERENCE COMPONENT IN THE OUTPUT SIGNAL OF SAID SECOND MIXER, A SECOND FREQUENCY MULTIPLIER CONNECTED TO MULTIPLY THE FREQUENCY OF THE OUTPUT SIGNAL OF SAID FIRST FILTER, A THIRD MIXER CONNECTED TO MIX THE OUTPUT SIGNALS OF SAID FIRST FREQUENCY MULTIPLIER AND SAID IF AMPLIFIER, A SECOND FILTER CONNECTED TO PASS THE SUM COMPONENT AND FILTER OUT THE DIFFERENCE COMPONENT IN THE OUTPUT SIGNAL OF SAID THIRD MIXER, A FOURTH MIXER CONNECTED TO MIX THE OUTPUT SIGNALS OF SAID SECOND FREQUENCY MULTIPLIER AND SAID SECOND FILTER, A THIRD FILTER CONNECTED TO PASS THE SUM COMPONENT AND FILTER OUT THE DIFFERENCE COMPONENT IN THE OUTPUT SIGNAL OF SAID FOURTH MIXER, AND A TRANSMITTING ANTENNA CONNECTED TO TRANSMIT THE OUTPUT SIGNAL OF SAID THIRD FILTER.