GB832172A - Improvements in or relating to parametric amplification of space charge waves - Google Patents

Improvements in or relating to parametric amplification of space charge waves

Info

Publication number
GB832172A
GB832172A GB35156/58A GB3515658A GB832172A GB 832172 A GB832172 A GB 832172A GB 35156/58 A GB35156/58 A GB 35156/58A GB 3515658 A GB3515658 A GB 3515658A GB 832172 A GB832172 A GB 832172A
Authority
GB
United Kingdom
Prior art keywords
signal
cavity
helix
fast
fast mode
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
GB35156/58A
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.)
AT&T Corp
Original Assignee
Western Electric Co 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 Western Electric Co Inc filed Critical Western Electric Co Inc
Publication of GB832172A publication Critical patent/GB832172A/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
    • H01J25/34—Travelling-wave tubes; Tubes in which a travelling wave is simulated at spaced gaps
    • H01J25/49—Tubes using the parametric principle, e.g. for parametric amplification

Landscapes

  • Microwave Tubes (AREA)

Abstract

832,172. Space-charge-wave tubes. WESTERN ELECTRIC CO. Inc. Nov. 3, 1958 [Nov. 25, 1957], No. 35156/58. Class 39(1). Parametric amplification of space charge waves is achieved by modulating an electron beam in the fast space-charge mode and introducing the signal to be amplified into fast mode coupling relationship with the beam. Noise in the fast mode is abstracted from the beam before the introduction of the signal. The introduction of the signal may be before or after the modulation of the beam in the fast mode. In Fig. 1 the tube comprises four twogap cavity resonators 16, 27, 39 and 52 separated by drift spaces. Noise abstracting cavity 16 is tuned to the midband frequency of the signal and fast wave modulating cavity 27 is preferably tuned to twice the frequency of the signal. Cavity 39 impresses the signal on the beam and the amplified signal is abstracted by the cavity 52. Grids may be provided on either side of the gaps in the cavities and the cavity resonator may be incorporated into the envelope of the tube or mounted externally. The cavity resonators may be replaced by helices with reflectionless terminations. Fast mode coupling is achieved by using the Kompfuer Dip condition with a suitable voltage on the helix dependent on the length of the helix. In Fig. 4 the signal is applied to and taken off from the helix 202. The beam velocity is slower than that of the wave propagating on the helix to secure the fast mode interaction. The theory of operation is given.
GB35156/58A 1957-11-25 1958-11-03 Improvements in or relating to parametric amplification of space charge waves Expired GB832172A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US698854A US2974252A (en) 1957-11-25 1957-11-25 Low noise amplifier

Publications (1)

Publication Number Publication Date
GB832172A true GB832172A (en) 1960-04-06

Family

ID=24806927

Family Applications (1)

Application Number Title Priority Date Filing Date
GB35156/58A Expired GB832172A (en) 1957-11-25 1958-11-03 Improvements in or relating to parametric amplification of space charge waves

Country Status (5)

Country Link
US (1) US2974252A (en)
BE (1) BE572781A (en)
FR (1) FR1213157A (en)
GB (1) GB832172A (en)
NL (2) NL232220A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1296273B (en) * 1960-07-04 1969-05-29 Siemens Ag Electron beam tubes for the amplification of electromagnetic waves of very high frequencies according to the parametric principle

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3258706A (en) * 1966-06-28 Noise reduction in slow beam waves by parametric cooling
US3090925A (en) * 1958-09-17 1963-05-21 Zenith Radio Corp Parametric amplifier
US3087119A (en) * 1959-11-19 1963-04-23 Bell Telephone Labor Inc Noise reduction system for parametric amplifiers
US3096485A (en) * 1960-01-04 1963-07-02 Rca Corp Diode traveling wave parametric amplifier
US3138765A (en) * 1960-02-01 1964-06-23 Bell Telephone Labor Inc Triode parametric amplifier
US3213383A (en) * 1960-03-14 1965-10-19 Philips Corp Parametric amplifier with its own backward wave oscillator supplying pump frequency
US3060341A (en) * 1960-04-08 1962-10-23 Bell Telephone Labor Inc Traveling wave tube
NL281685A (en) * 1961-08-02
GB9016017D0 (en) * 1990-07-20 1990-09-05 Eev Ltd Amplifying arrangements
US5162747A (en) * 1991-02-19 1992-11-10 Hughes Aircraft Company Velocity modulation microwave amplifier with multiple band interaction structures

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE437641A (en) * 1937-07-14
US2272165A (en) * 1938-03-01 1942-02-03 Univ Leland Stanford Junior High frequency electrical apparatus
US2455269A (en) * 1942-11-17 1948-11-30 Bell Telephone Labor Inc Velocity variation apparatus
BE481272A (en) * 1945-12-17
US2494721A (en) * 1947-06-18 1950-01-17 Bell Telephone Labor Inc Electron velocity variation device with noise reducing resonator
US2579480A (en) * 1947-08-26 1951-12-25 Sperry Corp Ultrahigh-frequency electron discharge apparatus
US2511120A (en) * 1948-06-12 1950-06-13 Bell Telephone Labor Inc Balanced electronic translating system
US2720610A (en) * 1950-07-27 1955-10-11 Kazan Benjamin Noise reducing travelling-wave tube
US2767259A (en) * 1952-10-01 1956-10-16 Rca Corp Noise compensation in electron beam devices
US2726291A (en) * 1953-12-07 1955-12-06 Bell Telephone Labor Inc Traveling wave tube
US2805333A (en) * 1955-07-26 1957-09-03 Sylvania Electric Prod Traveling wave tube mixer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1296273B (en) * 1960-07-04 1969-05-29 Siemens Ag Electron beam tubes for the amplification of electromagnetic waves of very high frequencies according to the parametric principle

Also Published As

Publication number Publication date
NL113950C (en)
US2974252A (en) 1961-03-07
BE572781A (en)
NL232220A (en)
FR1213157A (en) 1960-03-29

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