GB485806A - Improvements in or relating to modulation systems, for high frequency electric signalling - Google Patents

Improvements in or relating to modulation systems, for high frequency electric signalling

Info

Publication number
GB485806A
GB485806A GB10941/37A GB1094137A GB485806A GB 485806 A GB485806 A GB 485806A GB 10941/37 A GB10941/37 A GB 10941/37A GB 1094137 A GB1094137 A GB 1094137A GB 485806 A GB485806 A GB 485806A
Authority
GB
United Kingdom
Prior art keywords
modulation
modulating
plates
source
anode
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
Application number
GB10941/37A
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.)
Telefunken AG
Original Assignee
Telefunken AG
Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH
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
Application filed by Telefunken AG, Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH filed Critical Telefunken AG
Publication of GB485806A publication Critical patent/GB485806A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
    • H01J25/50—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field
    • H01J25/52—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field with an electron space having a shape that does not prevent any electron from moving completely around the cathode or guide electrode
    • 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
    • H03C3/00—Angle modulation
    • H03C3/30—Angle modulation by means of transit-time tube
    • H03C3/32—Angle modulation by means of transit-time tube the tube being a magnetron

Abstract

485,806. Valve generating and modulating circuits ; thermionic valves. TELEFUNKEN GES. FUR DBAHTLOSE TELEGRAPHIE. April 16, 1937, No. 10941. Convention date, April 16, 1936. [Classes 39 (i) and 40 (v)] In an oscillation generator of the magnetron type or the retarding-field type having an anode surrounding an axial cathode and having end plates transverse to the cathode, the end-plates are biassed negatively and modulating voltages are applied to them with the object of producing frequency modulation without amplitude modulation. Fig. 4 shows a magnetron with a split anode Al, A2 connected to a Lecher-wire tuning system O, and with its end-plates S biassed negatively by a source US and coupled to the modulating-source M by a transformer T. The curves of Fig. 3 (not shown) indicate that the modulation voltage varies the frequency of the oscillation without varying its amplitude. When amplitude modulation is effected by other means, e.g. as shown in Fig. 5, by coupling the modulating-source M to the anode circuit, the modulation may also be applied to the negative ond-plates S1, S2 with the object of compensating any undesired frequency modulation. Specification 468,271 is referred to.
GB10941/37A 1936-04-16 1937-04-16 Improvements in or relating to modulation systems, for high frequency electric signalling Expired GB485806A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE485806X 1936-04-16

Publications (1)

Publication Number Publication Date
GB485806A true GB485806A (en) 1938-05-25

Family

ID=6543331

Family Applications (1)

Application Number Title Priority Date Filing Date
GB10941/37A Expired GB485806A (en) 1936-04-16 1937-04-16 Improvements in or relating to modulation systems, for high frequency electric signalling

Country Status (3)

Country Link
US (1) US2216940A (en)
GB (1) GB485806A (en)
NL (1) NL47569C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE968094C (en) * 1946-02-26 1958-01-16 Raytheon Mfg Co Frequency modulated magnetron

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE968094C (en) * 1946-02-26 1958-01-16 Raytheon Mfg Co Frequency modulated magnetron

Also Published As

Publication number Publication date
NL47569C (en)
US2216940A (en) 1940-10-08

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