Pulsed carrier radio beacon transmitter

• US 3,299,356 A
• Filed: 04/10/1964
• Issued: 01/17/1967
• Est. Priority Date: 04/10/1964
• Status: Expired due to Term

• Current Assignee: Edward L. Gliatti, Kenneth F. Bornhorst, William L. Colello
• Original Assignee: Edward L. Gliatti, Kenneth F. Bornhorst, William L. Colello
• Inventors: Bornhorst, Kenneth F., Gliatti, Edward L., Colello, William L.
• Application Number:
  US04/358,781
• Time in Patent Office: 1,012 Days
• US Class Current: 455/108
• CPC Class Codes: G01S 1/685 using pulse modulation, e.g. pulse frequency modulation
• CPC Class Codes: H03B 5/362 the amplifier being a single transistor H03B5/364 - H03B5/368 take precedence

Claims

5. A PULSED CARRIER RADIO TRANSMITTER BEACON COMPRISING A SOURCE OF DIRECT CURRENT POTENTIAL, A RADIO FREQUENCY OSCILLATOR CIRCUIT MEANS, INCLUDING INPUT AND OUTPUT CIRCUIT MEANS, FOR PRODUCING A RADIO FREQUENCY CARRIER SIGNAL, A MODULATOR CIRCUIT MEANS, INCLUDING INPUT AND OUTPUT CIRCUIT MEANS, FOR KEYING SAID RADIO FREQUENCY OSCILLATOR CIRCUIT, ELECTRICAL CIRCUIT MEANS FOR CONNECTING SAID MODULATOR CIRCUIT MEANS OUTPUT CIRCUIT MEANS TO THE INPUT CIRCUIT MEANS OF SAID RADIO FREQUENCY OSCILLATOR CIRCUIT MEANS, ELECTRICAL CIRCUIT MEANS FOR CONNECTING SAID MODULATOR CIRCUIT MEANS OUTPUT CIRCUIT MEANS TO SAID SOURCE OF DIRECT CURRENT POTENTIAL, A MODULATOR CIRCUIT CONTROL CIRCUIT, INCLUDING INPUT AND OUTPUT CIRCUIT MEANS, FOR DETERMINING THE "ON" TIME OF SAID MODULATOR CIRCUIT MEANS, ELECTRICAL CIRCUIT MEANS FOR CONNECTING SAID MODULATOR CIRCUIT CONTROL CIRCUIT OUTPUT CIRCUIT MEANS TO THE INPUT CIRCUIT MEANS OF SAID MODULATOR CIRCUIT MEANS, POTENTIAL-SIGNAL-GENERATING CIRCUIT MEANS, INCLUDING INPUT AND OUTPUT CIRCUIT MEANS, FOR CONTROLLING THE OPERATION OF SAID MODULATOR CIRCUIT CONTROL CIRCUIT MEANS BY REPEATEDLY PRODUCING A PERIODIC SUBSTANTIALLY LINEARLY VARIABLE POTENTIAL SIGNAL THE MAGNITUDE OF WHICH CHANGES SUBSTANTIALLY LINEARLY OVER EACH PERIOD FOR PRODUCING THE FREQUENCY-DETERMINING POTENTIAL FOR SAID MODULATOR CIRCUIT CONTROL CIRCUIT MEANS, ELECTRICAL CIRCUIT MEANS FOR CONNECTING SAID POTENTIALSIGNAL-GENERATING CIRCUIT INPUT CIRCUIT MEANS TO SAID SOURCE OF DIRECT CURRENT POTENTIAL, ELECTRICAL CIRCUIT MEANS FOR CONNECTING SAID POTENTIALSIGNAL-GENERATING CIRCUIT OUTPUT CIRCUIT MEANS TO SAID MODULATOR CIRCUIT CONTROL CIRCUIT INPUT CIRCUIT MEANS WHEREBY THE FREQUENCY OF SAID MODULATOR CIRCUIT CONTROL CIRCUIT IS VARIED OVER A PREDETERMINED RANGE DURING EACH PERIOD OF SAID SUBSTANTIALLY LINEARLY VARIABLE POTENTIAL SIGNAL, A FREQUENCY DOUBLER CIRCUIT MEANS, INCLUDING INPUT AND OUTPUT CIRCUIT MEANS, AT LEAST ONE RADIO FREQUENCY AMPLIFIER CIRCUIT MEANS HAVING INPUT AND OUTPUT CIRCUIT MEANS, ELECTRICAL CIRCUIT MEANS FOR CONNECTING IN ORDER SAID OSCILLATOR CIRCUIT MEANS, SAID FREQUENCY DOUBLER CIRCUIT MEANS, AND SAID RADIO FREQUENCY AMPLIFIER CIRCUIT MEANS IN CASCADE, AND ANTENNA CIRCUIT MEANS CONNECTED TO SAID OUTPUT CIRCUIT MEANS OF THE LAST RADIO FREQUENCY AMPLIFIER STAGE.