GB852510A - Improvements in or relating to attenuators or suppressors for attenuating or suppressing undesired oscillations - Google Patents

Improvements in or relating to attenuators or suppressors for attenuating or suppressing undesired oscillations

Info

Publication number
GB852510A
GB852510A GB6746/56A GB674656A GB852510A GB 852510 A GB852510 A GB 852510A GB 6746/56 A GB6746/56 A GB 6746/56A GB 674656 A GB674656 A GB 674656A GB 852510 A GB852510 A GB 852510A
Authority
GB
United Kingdom
Prior art keywords
oscillations
section
impedance
frequency
undesired
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
GB6746/56A
Inventor
Leonard Tony King
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 GB6746/56A priority Critical patent/GB852510A/en
Priority to FR1167360D priority patent/FR1167360A/en
Publication of GB852510A publication Critical patent/GB852510A/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
    • H01J23/16—Circuit elements, having distributed capacitance and inductance, structurally associated with the tube and interacting with the discharge
    • H01J23/24—Slow-wave structures, e.g. delay systems
    • H01J23/30—Damping arrangements associated with slow-wave structures, e.g. for suppression of unwanted oscillations
    • 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
    • H01J23/40—Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy to or from the interaction circuit
    • H01J23/46—Loop coupling devices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/16—Auxiliary devices for mode selection, e.g. mode suppression or mode promotion; for mode conversion
    • H01P1/162—Auxiliary devices for mode selection, e.g. mode suppression or mode promotion; for mode conversion absorbing spurious or unwanted modes of propagation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/22—Attenuating devices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P7/00—Resonators of the waveguide type
    • H01P7/04—Coaxial resonators
    • 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
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/18—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising distributed inductance and capacitance
    • H03B5/1817—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising distributed inductance and capacitance the frequency-determining element being a cavity resonator
    • H03B5/1835—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising distributed inductance and capacitance the frequency-determining element being a cavity resonator the active element in the amplifier being a vacuum tube

Landscapes

  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)

Abstract

852,510. Microwave resonators and attenuators. ELECTRIC & MUSICAL INDUSTRIES Ltd. Feb. 12, 1957 [March 3, 1956], No. 6746/56. Class 40(8). An attenuator for suppressing undesired oscillations in a waveguide or cavity resonator comprises a resistive load connected to the source of oscillations by a circuit which presents a high impedance to oscillations of the desired frequency and a lower impedance to those of the undesired frequency. The attenuator is connected -to the source (e.g. the toroidal cavity of a klystron) either by a low-impedance probe or by a loop 1 which is integral with the central conductor 2 of a coaxial transmission line having an outer conductor 3. The transmission line terminates in a resistive load 4 composed of a body of lossy material housed in a tubular extension 6 of the conductive end member 5. The line comprises two quarter-wave sections 7, 8 each resonant at the frequency of the desired oscillations, the section 8 having a characteristic impedance about ten times greater than that of section 7. Section 8 presents a high impedance to the desired frequencies, this high impedance being transformed by the section 8 into a virtual shortcircuit at the point 9. Undesired frequencies are transmitted to the load and absorbed.
GB6746/56A 1956-03-03 1956-03-03 Improvements in or relating to attenuators or suppressors for attenuating or suppressing undesired oscillations Expired GB852510A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB6746/56A GB852510A (en) 1956-03-03 1956-03-03 Improvements in or relating to attenuators or suppressors for attenuating or suppressing undesired oscillations
FR1167360D FR1167360A (en) 1956-03-03 1957-03-01 Improvements to devices intended to attenuate or suppress unwanted oscillations

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB6746/56A GB852510A (en) 1956-03-03 1956-03-03 Improvements in or relating to attenuators or suppressors for attenuating or suppressing undesired oscillations
GB1167360X 1956-03-03
GB2950450X 1956-03-03

Publications (1)

Publication Number Publication Date
GB852510A true GB852510A (en) 1960-10-26

Family

ID=27254885

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6746/56A Expired GB852510A (en) 1956-03-03 1956-03-03 Improvements in or relating to attenuators or suppressors for attenuating or suppressing undesired oscillations

Country Status (2)

Country Link
FR (1) FR1167360A (en)
GB (1) GB852510A (en)

Also Published As

Publication number Publication date
FR1167360A (en) 1958-11-24

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