GB820791A - Improvements in or relating to microwave pulse generating circuits embodying magnetrons and to magnetrons for use therein - Google Patents

Improvements in or relating to microwave pulse generating circuits embodying magnetrons and to magnetrons for use therein

Info

Publication number
GB820791A
GB820791A GB499755A GB499755A GB820791A GB 820791 A GB820791 A GB 820791A GB 499755 A GB499755 A GB 499755A GB 499755 A GB499755 A GB 499755A GB 820791 A GB820791 A GB 820791A
Authority
GB
United Kingdom
Prior art keywords
cathode
gas
magnetrons
gas pressure
pulses
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
GB499755A
Inventor
James Rodney Mitchell Vaughan
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.)
EMI Ltd
Electrical and Musical Industries Ltd
Original Assignee
EMI Ltd
Electrical and Musical Industries Ltd
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 EMI Ltd, Electrical and Musical Industries Ltd filed Critical EMI Ltd
Priority to GB499755A priority Critical patent/GB820791A/en
Priority to DEE11961A priority patent/DE1095404B/en
Priority to FR1148022D priority patent/FR1148022A/en
Publication of GB820791A publication Critical patent/GB820791A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J17/00—Gas-filled discharge tubes with solid cathode
    • H01J17/02—Details
    • H01J17/22—Means for obtaining or maintaining the desired pressure within the tube
    • H01J17/26—Means for producing, introducing, or replenishing gas or vapour during operation of the 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
    • H01J25/50—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
    • H01J25/58—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 having a number of resonators; having a composite resonator, e.g. a helix
    • H01J25/587—Multi-cavity magnetrons
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/78—Generating a single train of pulses having a predetermined pattern, e.g. a predetermined number

Landscapes

  • Microwave Tubes (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)

Abstract

820,791. Magnetrons. ELECTRIC & MUSICAL INDUSTRIES Ltd. Jan. 26, 1956 [Feb. 18, 1955 ; June 8, 1955], Nos. 4997/55 and 16406/55. Class 39(1). [Also in Group XXXV] A magnetron for generating micro-wave pulses with steep leading edges has a gas filling to indicate a secondary electron discharge from the cathode by ionic bombardment, and the gas pressure is utilized to determine the duration of current pulses 22, Fig. 3, produced by the discharge and thereby the duration of the microwave pulses when voltage pulses 19 are applied between the cathode and the anode of the magnetron. The gas pressure may be controlled by using a reversible gas generator 9, Fig. 1, which has a heater and control circuit for keeping the gas pressure constant (see Group XXXV). A suitable gas pressure is within the range 10-<SP>2</SP> to 10-<SP>6</SP> mm. Hg. and the gas may be hydrogen or an inert gas. The gas generator may comprise tungsten wire gauze coated with zirconium metal powder by electrophoresis. The cathode is cooled below the temperature at which primary emission occurs by circulating water through it or through the cathode support. The cathode may be operated at 600‹ to 700‹C. to prevent the deposition on it of copper eroded from the anode. The cathode material may be silver.
GB499755A 1955-02-18 1955-02-18 Improvements in or relating to microwave pulse generating circuits embodying magnetrons and to magnetrons for use therein Expired GB820791A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB499755A GB820791A (en) 1955-02-18 1955-02-18 Improvements in or relating to microwave pulse generating circuits embodying magnetrons and to magnetrons for use therein
DEE11961A DE1095404B (en) 1955-02-18 1956-02-16 Arrangement for generating microwave pulses with a magnetron tube
FR1148022D FR1148022A (en) 1955-02-18 1956-02-18 Improvements to pulse generator circuits essentially consisting of magnetrons

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB499755A GB820791A (en) 1955-02-18 1955-02-18 Improvements in or relating to microwave pulse generating circuits embodying magnetrons and to magnetrons for use therein

Publications (1)

Publication Number Publication Date
GB820791A true GB820791A (en) 1959-09-23

Family

ID=9787776

Family Applications (1)

Application Number Title Priority Date Filing Date
GB499755A Expired GB820791A (en) 1955-02-18 1955-02-18 Improvements in or relating to microwave pulse generating circuits embodying magnetrons and to magnetrons for use therein

Country Status (3)

Country Link
DE (1) DE1095404B (en)
FR (1) FR1148022A (en)
GB (1) GB820791A (en)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2409038A (en) * 1942-12-31 1946-10-08 Rca Corp Magnetron and circuit therefor

Also Published As

Publication number Publication date
FR1148022A (en) 1957-12-03
DE1095404B (en) 1960-12-22

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