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GB869050A - Improvements in reflex klystrons - Google Patents

Improvements in reflex klystrons

Info

Publication number
GB869050A
GB869050A GB13429/59A GB1342959A GB869050A GB 869050 A GB869050 A GB 869050A GB 13429/59 A GB13429/59 A GB 13429/59A GB 1342959 A GB1342959 A GB 1342959A GB 869050 A GB869050 A GB 869050A
Authority
GB
United Kingdom
Prior art keywords
wave
klystron
cavity resonator
mode
external cavity
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
GB13429/59A
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.)
Varian Medical Systems Inc
Original Assignee
Varian Associates Inc
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 Varian Associates Inc filed Critical Varian Associates Inc
Publication of GB869050A publication Critical patent/GB869050A/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
    • H01J25/02—Tubes with electron stream modulated in velocity or density in a modulator zone and thereafter giving up energy in an inducing zone, the zones being associated with one or more resonators
    • H01J25/22—Reflex klystrons, i.e. tubes having one or more resonators, with a single reflection of the electron stream, and in which the stream is modulated mainly by velocity in the modulator zone
    • H01J25/24—Reflex klystrons, i.e. tubes having one or more resonators, with a single reflection of the electron stream, and in which the stream is modulated mainly by velocity in the modulator zone in which the electron stream is in the axis of the resonator or resonators and is pencil-like before reflection
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
    • H01J23/36—Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons

Landscapes

  • Control Of Motors That Do Not Use Commutators (AREA)
  • Microwave Tubes (AREA)

Abstract

869,050. Impedance matching. VARIAN ASSOCIATES. April 20, 1959 [May 26, 1958], No. 13429/59. Class 40(8) [Also in Group XL(a)] A reflex klystron of the internal-external cavity resonator type has means for suppressing undesired modes of operation including a wave trap in the form of a cavity resonator coupled to the external cavity, the cavity resonator containing a dissipative element for absorbing energy associated with the undesired mode. The klystron comprises an emitter 19, focusing electrode 20, grids 16, 18 and reflector electrode 14. Energy is transmitted to an external cavity resonator through an oval ceramic window 23 sealed in a flexible alloy frame 22. The space 22<SP>1</SP> between the window frame and the body of the klystron presents a series inductance to the transmitted wave the effect of which is eliminated by means of a number (e.g. two or four) of flexible metallic strips 24 brazed to the window frame and the klystron body. Coupling between the internal and external cavities is improved by means of a U-shaped nickel strap 37 which also has the effect of increasing the frequency separation between the full-wave mode and the unwanted 3#/2 mode. The external cavity is tuned by a capacitative plunger 29 such as is described in Specification 861,069. The cavity is connected by a quarter-wave section 31 to a wave trap 32 designed to surpress the unwanted mode. A resistance card 36 is arranged in the trap 32 one quarter-wavelength from the end wall. In the modification shown in Fig. 3, the wave trap 42 containing resistive card 43 is coupled to the external cavity resonator 39 by means of a quarter-wave section 38. The cavity is coupled to the section 38 by an aperture 41.
GB13429/59A 1958-05-26 1959-04-20 Improvements in reflex klystrons Expired GB869050A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US737734A US2955228A (en) 1958-05-26 1958-05-26 Electron discharge device

Publications (1)

Publication Number Publication Date
GB869050A true GB869050A (en) 1961-05-25

Family

ID=24965093

Family Applications (1)

Application Number Title Priority Date Filing Date
GB13429/59A Expired GB869050A (en) 1958-05-26 1959-04-20 Improvements in reflex klystrons

Country Status (4)

Country Link
US (1) US2955228A (en)
DE (2) DE1279212B (en)
FR (1) FR1225408A (en)
GB (1) GB869050A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL298491A (en) * 1962-09-28
US3593192A (en) * 1968-07-30 1971-07-13 Nippon Electric Co Double cavity type solid state oscillator device

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB640899A (en) * 1941-10-23 1950-08-02 Sperry Corp Improvements in or relating to frequency multiplier electron discharge apparatus
US2678404A (en) * 1949-12-30 1954-05-11 Sperry Corp High-frequency electron discharge apparatus
US2644889A (en) * 1950-02-14 1953-07-07 Polytechnic Res And Dev Compan Mode suppressor for external cavity klystron oscillators
GB706810A (en) * 1952-01-03 1954-04-07 Ferranti Ltd Improvements relating to metallic diaphragms for the transmission of high frequencies
US2789250A (en) * 1952-07-30 1957-04-16 Varian Associates High frequency device
FR1108985A (en) * 1953-10-07 1956-01-19 Emi Ltd Resonant cavity improvements
US2815467A (en) * 1954-12-23 1957-12-03 Varian Associates High frequency tube
US2824258A (en) * 1955-07-14 1958-02-18 Varian Associates High frequency cavity resonator tuner structure
US2798184A (en) * 1955-08-18 1957-07-02 Varian Associates Electron tube apparatus
US2806977A (en) * 1957-01-16 1957-09-17 Bomac Lab Inc Microwave oscillator tuning structure

Also Published As

Publication number Publication date
DE1279212B (en) 1968-10-03
FR1225408A (en) 1960-06-30
US2955228A (en) 1960-10-04
DE1284523B (en) 1968-12-05
DE1284523C2 (en) 1973-05-17

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