US2060934A - Radio communication with very short waves - Google Patents

Radio communication with very short waves Download PDF

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Publication number
US2060934A
US2060934A US439467A US43946730A US2060934A US 2060934 A US2060934 A US 2060934A US 439467 A US439467 A US 439467A US 43946730 A US43946730 A US 43946730A US 2060934 A US2060934 A US 2060934A
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US
United States
Prior art keywords
frequency
valve
ultra
oscillations
thermionic
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
US439467A
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English (en)
Inventor
Gerhard Ernst
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.)
MEAF Machinerieen en Apparaten Fabrieken NV
Original Assignee
MEAF Machinerieen en Apparaten Fabrieken NV
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.)
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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B9/00—Generation of oscillations using transit-time effects
    • H03B9/01—Generation of oscillations using transit-time effects using discharge tubes
    • H03B9/02—Generation of oscillations using transit-time effects using discharge tubes using a retarding-field tube
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
    • H01J25/68—Tubes specially designed to act as oscillator with positive grid and retarding field, e.g. for Barkhausen-Kurz oscillators
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C5/00—Amplitude modulation and angle modulation produced simultaneously or at will by the same modulating signal
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D1/00—Demodulation of amplitude-modulated oscillations
    • H03D1/26—Demodulation of amplitude-modulated oscillations by means of transit-time tubes

Definitions

  • an arrangement for generating ultra-short waves modulated at a high frequency, an arrangement is used in which the generating of the ultra-short waves is effected by the Barkhausen and Kurz method, known in itself.
  • the frequency f1 of the ultra-high-frequency oscillations generated by the valve in this way is completely independent of the length and arrangements of the leads, and also of the oscillating circuits included in the leads, for instance the oscillating circuit III, II in Figure 1.
  • the thermionic valve I'I generates, with the known back-coupling connection, any desired high-frequency f2, which is lower than the ultra-high frequency f1 generated by the valve 2.
  • the coil I6 is now coupled to the oscillating circuit I2, I5 and is also coupled to the coil II of the oscillating circuit III, II.
  • the generating of the high-frequency oscillations f2 employed for modulation may be effected according to the present invention by the same valve by which the ultra-high frequency oscillations f1 are generated.
  • any desired high-frequency or low-frequency oscillating circuit Ill, II is connected, in which case the oscillator I2, I5, I5, II will not however be present, this oscillating circuit excites itself at its natural frequency f2, quite independently of the frequency f1 of the ultra-high-frequency oscillations primarily generated by the valve 2.
  • the ultra-high-frequency oscillations h are modulated at a high or low frequency according to the magnitude of the frequency f2.
  • the high-frequency or low-frequency oscillations f2 generated in this way in the oscillating circuit III, II may of course be employed not only for the modulation of the ultra-short waves generated at the same time by the valve 2 but also in other ways; for instance they may serve in their turn as a transmission wave.
  • an oscillating circuit 29. 3! cor responding to the oscillating circuit III. II is connected between the electrode 3 and the grid 4 of the thermionic valve 2.
  • the high positive voltage G is supplied to the grid by a choking coil 21.
  • the voltage for the electrode 3 is applied at P.
  • the frequency generated in the circuit 29-30 and modulating the Barkhausen-Kurz high frequency may be partially taken from the circuit car by the coil 3
  • An increase in the oscillation output and in the stability of the high frequency f2 secondarily generated by the valve 2 is obtained according to the present invention by coupling together two or more oscillating circuits located between each two electrodes of the valve connected in the braking field connection.
  • FIG. 5 shows a useful arrangement for this purpose.
  • a high positive voltage G To the grid 4 of the valve 2 is applied a high positive voltage G, and to the electrode 3 a lower positive or negative voltage P.
  • G To the grid 4 of the valve 2 is applied a high positive voltage G, and to the electrode 3 a lower positive or negative voltage P.
  • P To the grid 4 of the valve 2 is applied a high positive voltage G, and to the electrode 3 a lower positive or negative voltage P.
  • the valve 2 ultra-high-frequency oscillations of the frequency h are generated.
  • the oscillating circuits II], II and 24, 25 are tuned to the same frequency and coupled to one another.
  • Figure 6 shows an arrangement by which the Ultra-high-frequency oscillations of the frequency f1 generated by the valve 2 can be'modulated both with the high frequency f2 determined by theoscillating circuit I0, II and at a low frequency.
  • Part of the coil I I forms the secondary winding or a modulating choke, upon the core 2
  • Figure 7 shows an arrangement in which the oscillating circuit I0, II is excited at a high frequency, and the oscillating circuit 24, 25 at a low frequency, the self-excitationof these circuits beingagain effected in the same manner as has been described above. With this arrangement a simultaneous high-frequency and low-frequency modulation of the ultra-short waves generated by the valve 2 is likewise obtained.
  • a high-frequency and low-frequency modulation of the ultra-short transmission waves is effected owing to the fact that the highfrequency by which the ultra-short Waves are modulated in one of the arrangements hereinbefore described is in its turn modulated as a low frequency by known means.
  • An arrangement for generating ultra-short electrical waves modulated at a high frequency comprising a thermionic valve having a filament and consisting of a grid electrode of high positive voltage of several hundred volts and a braking electrode of a lower voltage of only a few volts in relation to the filament, producing ultra-high-frequency thermionic oscillations in the valve and means for applying between two electrodes of the valve a supplementary highfrequency alternating voltage, said last mentioned means including a high-frequency, parallel' tuned. oscillating circuit, connected between two electrodes of the thermionic valve, and a high frequency generator coupled to said oscillating circuit.
  • An arrangement for generating ultra-short electrical waves modulated at a high frequency comprising a thermionic valve having a filament and consisting of a grid electrode of high positive voltage of several hundred volts and a braking electrode of a lower voltage of only a few volts inrelation to the filament, producing ultra-high frequency thermionic oscillations in the valve and means for applying between twoelectrodes of the valve a supplementary high-frequency alternating voltage, the last mentioned means including an oscillating circuit connected between two electrodes of the valve, the natural frequency of said circuit being essentially diiferent from the frequency of the ultra-short waves primarilyl generated by the valve, whereby secondary electrical oscillations arise in this oscillating circuit.
  • a thermionic valve having a filament and consisting of a grid electrode of high positive voltage of several hundred volts and a braking electrode of a lower voltage of only a few volts in relation to the filament, producing ultrahigh-frequency thermionic oscillations in the valve and means for applying betweentwo electrodes of the valve a supplementary high-frequency-alternating voltage, said last mentioned means including two oscillating circuits coupled together, each being connected between two elec trodes of the valve.
  • An arrangement for generating ultra-short electrical waves modulated at a high frequency comprising a thermionic valve having a filament and consisting of a grid electrode of high positive voltage of several hundred volts and a braking electrode of a: lower voltage of only a few volts in relation to the filament, producing ultrahigh-frequency thermionic oscillations in the valve and means for applying between two electrodes of thevalve a supplementary high-frequency alternating voltage, said last mentioned means including a high-frequency parallel tuned oscillating circuit, connected between grid and cathode of the thermionic valve, and a highfrequency generator coupled to said oscillating circuit.
  • An arrangement for generating ultra-short electrical waves modulatedat a high frequency comprising a thermionic valve having a filament and consisting of a grid electrode of high positive voltage of several hundred volts and a braking-electrode of a lower voltage of only a few volts in relation to the filament, producing ultrahigh-frequency thermionic oscillations in the valve and means for applying between two electrodes of the valve a supplementary high-frequency alternating voltage, said last mentioned means including an oscillating circuit connected between braking electrode and cathode of the valve, the natural frequency of said circuit being essentially different from the frequency of the ultra-short waves primarily generated by the valve, whereby secondary electrical oscillations arise in this oscillating circuit.
  • a thermionic valve having a filament and consisting of a grid electrode of high positive voltage of several hundred volts and a braking electrode of a lower voltageof only a few Volts in relation to the filament, producing ultrahigh-frequency thermionic Oscillations in the valve and means for applying between two electrodes of the valve a supplementary high-frequency alternating voltage, said last mentioned means including two oscillating circuits coupled together, one oscillating circuit being connected between the braking electrode and filament and the other oscillating circuit between the grid and the filament of the valve.
  • An arrangement for generating ultra-short electrical waves modulated at a high frequency comprising a thermionic valve having a filament and consisting of a grid electrode of high positive voltage of several hundred volts and a braking electrode of a lower voltage of only a few volts in relation to the filament, producing ultrahigh-frequency thermionic oscillations in the valve and means for applying between two electrodes of the valve a supplementary high-frequency 'alternatng voltage, said last mentioned means including a high frequency parallel tuned oscillating circuit connected between two electrodes of the thermionic valve, and a coil coupled to said oscillatory circuit, adapted to transmit the electrical oscillations of the mentioned circuit to a second utilization circuit.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transmitters (AREA)
  • General Induction Heating (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
US439467A 1929-04-02 1930-03-27 Radio communication with very short waves Expired - Lifetime US2060934A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE358064X 1929-04-02

Publications (1)

Publication Number Publication Date
US2060934A true US2060934A (en) 1936-11-17

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ID=6290739

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US439467A Expired - Lifetime US2060934A (en) 1929-04-02 1930-03-27 Radio communication with very short waves

Country Status (5)

Country Link
US (1) US2060934A (enrdf_load_stackoverflow)
AT (1) AT135444B (enrdf_load_stackoverflow)
FR (1) FR706390A (enrdf_load_stackoverflow)
GB (1) GB358064A (enrdf_load_stackoverflow)
NL (1) NL37794C (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2591316A (en) * 1943-03-06 1952-04-01 Hartford Nat Band And Trust Co Device for producing an oscillatory circuit tuned to an ultrahigh frequency

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2591316A (en) * 1943-03-06 1952-04-01 Hartford Nat Band And Trust Co Device for producing an oscillatory circuit tuned to an ultrahigh frequency

Also Published As

Publication number Publication date
GB358064A (en) 1931-09-30
NL37794C (enrdf_load_stackoverflow)
FR706390A (fr) 1931-06-23
AT135444B (de) 1933-11-10

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