US2480164A - Feedback antenna system - Google Patents

Feedback antenna system Download PDF

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Publication number
US2480164A
US2480164A US587239A US58723945A US2480164A US 2480164 A US2480164 A US 2480164A US 587239 A US587239 A US 587239A US 58723945 A US58723945 A US 58723945A US 2480164 A US2480164 A US 2480164A
Authority
US
United States
Prior art keywords
antenna
circuit
antenna system
inductance
impedance
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US587239A
Other languages
English (en)
Inventor
George T Royden
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
STC PLC
Federal Telephone and Radio Corp
Original Assignee
Standard Telephone and Cables PLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to BE464416D priority Critical patent/BE464416A/xx
Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to US587239A priority patent/US2480164A/en
Priority to GB33903/45A priority patent/GB604582A/en
Priority to ES0179050A priority patent/ES179050A1/es
Application granted granted Critical
Publication of US2480164A publication Critical patent/US2480164A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H2/00—Networks using elements or techniques not provided for in groups H03H3/00 - H03H21/00
    • H03H2/005—Coupling circuits between transmission lines or antennas and transmitters, receivers or amplifiers
    • H03H2/006—Transmitter or amplifier output circuits
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • H03C3/10—Angle modulation by means of variable impedance
    • H03C3/12—Angle modulation by means of variable impedance by means of a variable reactive element
    • H03C3/18—Angle modulation by means of variable impedance by means of a variable reactive element the element being a current-dependent inductor

Definitions

  • the volta aqm s capacitor 25 also constitu es the we xczi t z 191tage between grid and cathode of vacuum tube I.
  • Thisyoltag'e appearingifrnm ,c'athdd to ground across capacitor 25 is"in phase with'the vcltage existing acrcssithe ldad circuit of Vacuum tube 1 with respect to ground because the vacuum tube atct's' asambnfirf"Thus fiart pf'th pg-wet reciifiedqift'lf 'tralimTSin fin' will be 1?;
  • the frequency of operation is determined partly by the resonant circuits constituted by inductor 4 and capacitor 5 also inductor I3 and capacitor 25, but principally by the total length of the transmission path extending through the antenna to the far end and back through the transmission line to the input circuit of vacuum tube
  • the precise frequency will be such that the voltage arriving at the grid with respect to the cathode will be 180 electrical degrees out of phase with the voltage in the anode circuit of vacuum tube with respect to ground.
  • an artificial line comprising capacitors l5 and H and inductor l8.
  • One or more of the elements of this artificial line may be made variable. They serve to change the equivalent electrical length of this line and to adjust the operating frequency.
  • Fig. 2 also provides a grid capacitor I9 and a grid leak resistor 20. tains inductors 2
  • Fig. 3 shows a system for frequency modulation.
  • Inductor coil [8 in the artificial line is coupled to another inductor coil 4
  • This latter coil is in the plate circuit of a modulator vacuum tube 42 the grid circuit of which is controlled by the signal intelligence to be transmitted.
  • Variations in the voltage impressed on the grid circuit of vacuum tube 42 cause a change in impedance shunted across inductor 4
  • Two or more antennae similar to those described may be employed for the purpose of obtaining a better directional radiation pattern. This is schematically explained in Fig. 4.
  • Local auxiliary antenna 43 is so located that its maximum radiation is in the direction of local receiving station (not shown) intended for reception of signals on the same frequency from another local source 44. Phase and magnitude of the current supplied to antenna 43 from source 46 should be so adjusted that the radiation from this antenna counter-balances the radiation from the main antenna 45 in the direction of the receiving station.
  • the two antennae 43, 45 can be The cathode circuit con- This change is rephase shifting or phase balancing device 48 arranged between source 41 and antenna 43 as indicated in Fig. 4, in dotted lines.
  • an antenna system an amplifier including a cathode circuit and a plate T tank circuit, said antenna system substantially radiant acting to energy received from said plate tank circuit, said cathode circuit coupled to receive the energy not radiated by said radiant acting antenna system and returned back over said radiant acting antenna system to provide said amplifier with regenerative energy.
  • said antenna system comprises a closed transmission line including an input impedance connected to the plate tank circuit and a terminating impedance coupled to ground, the amount of coupling being such that the terminating impedance when reflected through the coupled circuits will be substantially equal to the surge impedance of the transmission line.
  • an antenna system comprising at least a pair of antenna wires elevated above ground, a first inductance having ends connected to one end of said antenna wires and having a center connection to the plate tank circuit, a second inductance connected to the other end of said antenna wires and inductively coupled to ground, the amount of coupling being such that the terminating impedance when reflected through the coupled circuit will be equal to the surge impedance of the transmission'line formed by said antenna wires.
  • an antenna system comprising at least a pair of antenna wires elevated above ground, a first inductance having ends connected to one end of said antenna wires and having a center connection to the plate tank circuit, said center connection forming two halves of said first inductance, a second inductance connected to the other end of said antenna wires and inductively coupled to ground, the amount of inductive coupling of said second inductance being such that the terminating impedance when reflected through the coupled circuit will be equal to the surge impedance of the transmission line formed by said antenna wires, said inductive coupling including a third inductance connected to ground, and means including a capacitance for neutralizing the reactance of said third inductance and of the leakage reactance of the two halves of said first inductance.
  • a cathode circuit tuned at resonance with the operating frequency of said antenna system.
  • an amplifier consisting of a vacuum tube triode, means for operating saidtriode inversely, said means including a control grid for said triode connected to ground, input and anode circuits for said triode, resonant circuits included in said input and anode circuits and determining the frequency of operation together with the total length of the transmission path extending through said antenna system to the far end and back to the input circuit, the voltage arriving at the control grid being 180 electric degrees out of phase with the voltage in the anode circuit.
  • an antenna system forming an artificial line and variable elements for changing the equivalent electrical length of said artificial line to adjust the operating frequency.
  • a cathode circuit including inductors by-passed by capacitors for resonating said inductors and neutralizing the reactance of the coupling.
  • an antenna system comprising a closed transmission line including an input impedance connected to the plate tank circuit and a terminating impedance coupled to ground, the amount of coupling being such that the terminating impedance when reflected through the coupled circuits will be substantially equal to the surge impedance of the transmission line, said transmission line comprising means for changing the characteristics of said antenna system so that the apparent velocity of propagation of the curr nt flowing towards said input inductance is made substantially equal to the velocity of propagation of the radiated wave.
  • a cathode circuit inductively coupled to said antenna system and forming therewith an artificial line.
  • a cathode circuit inductively coupled to said antenna system and forming therewith an artificial line, and modulating means coupled to said artificial line.
  • a cathode circuit inductively coupled to said antenna system and forming therewith an artificial line, a first inductance in said artificial line, a second inductance coupled to said first inductance, a
  • modulator tube having a plate circuit coupled to said second inductance and having a grid circuit controlled by signal intelligence to be transmitted so as to cause a change in impedance shunted across said second inductor said change being accompanied by a change in reactance of said first inductance and a modulation in the frequency of oscillation.
  • An antenna system comprising an amplifier, a two conductor antenna, means for coupling the output of said amplifier to said antenna in such energy transfer relation that current flow is in the same direction in said conductors, and terminating means for returning energy to the input of said amplifier in such relation that current flow is in opposite directions in said conductors.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Power Engineering (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Transmitters (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
US587239A 1945-04-09 1945-04-09 Feedback antenna system Expired - Lifetime US2480164A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BE464416D BE464416A (cs) 1945-04-09
US587239A US2480164A (en) 1945-04-09 1945-04-09 Feedback antenna system
GB33903/45A GB604582A (en) 1945-04-09 1945-12-14 Directive antenna system and associated thermionic valve generator
ES0179050A ES179050A1 (es) 1945-04-09 1947-07-23 Sistemas de antena orientable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US587239A US2480164A (en) 1945-04-09 1945-04-09 Feedback antenna system

Publications (1)

Publication Number Publication Date
US2480164A true US2480164A (en) 1949-08-30

Family

ID=24348969

Family Applications (1)

Application Number Title Priority Date Filing Date
US587239A Expired - Lifetime US2480164A (en) 1945-04-09 1945-04-09 Feedback antenna system

Country Status (4)

Country Link
US (1) US2480164A (cs)
BE (1) BE464416A (cs)
ES (1) ES179050A1 (cs)
GB (1) GB604582A (cs)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2810906A (en) * 1951-08-29 1957-10-22 Leonard J Lynch Electronic antenna

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1986623A (en) * 1931-03-21 1935-01-01 Rca Corp Signaling apparatus
US2237765A (en) * 1937-05-05 1941-04-08 Telefunken Gmbh Antenna
US2262932A (en) * 1939-09-14 1941-11-18 Radio Patents Corp Frequency variation response system
US2290314A (en) * 1940-09-24 1942-07-21 Rca Corp Feedback system for traveling wave antennas
US2297925A (en) * 1940-04-06 1942-10-06 Rca Corp Antenna system
US2393656A (en) * 1944-01-05 1946-01-29 Standard Telephones Cables Ltd Radio antenna system
US2396884A (en) * 1940-05-02 1946-03-19 Robinson James Radio receiving and transmitting system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1986623A (en) * 1931-03-21 1935-01-01 Rca Corp Signaling apparatus
US2237765A (en) * 1937-05-05 1941-04-08 Telefunken Gmbh Antenna
US2262932A (en) * 1939-09-14 1941-11-18 Radio Patents Corp Frequency variation response system
US2297925A (en) * 1940-04-06 1942-10-06 Rca Corp Antenna system
US2396884A (en) * 1940-05-02 1946-03-19 Robinson James Radio receiving and transmitting system
US2290314A (en) * 1940-09-24 1942-07-21 Rca Corp Feedback system for traveling wave antennas
US2393656A (en) * 1944-01-05 1946-01-29 Standard Telephones Cables Ltd Radio antenna system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2810906A (en) * 1951-08-29 1957-10-22 Leonard J Lynch Electronic antenna

Also Published As

Publication number Publication date
BE464416A (cs)
GB604582A (en) 1948-07-06
ES179050A1 (es) 1947-10-01

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