US2306282A - Tuning arrangement for cavity resonators - Google Patents

Tuning arrangement for cavity resonators Download PDF

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Publication number
US2306282A
US2306282A US400280A US40028041A US2306282A US 2306282 A US2306282 A US 2306282A US 400280 A US400280 A US 400280A US 40028041 A US40028041 A US 40028041A US 2306282 A US2306282 A US 2306282A
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United States
Prior art keywords
plate
tuning
slot
cavity resonators
tuning arrangement
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Expired - Lifetime
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US400280A
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Arthur L Samuel
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AT&T Corp
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Bell Telephone Laboratories Inc
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Priority to US400280A priority Critical patent/US2306282A/en
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Publication of US2306282A publication Critical patent/US2306282A/en
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    • 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
    • H01J25/06—Tubes having only one resonator, without reflection of the electron stream, and in which the modulation produced in the modulator zone is mainly velocity modulation, e.g. Lüdi-Klystron

Definitions

  • This invention relates to tuning arrangements for resonating chambers, sometimes called cavity resonators, and is particularly applicable to ultrahigh frequency wave technique.
  • one or more slots are provided in the walls of the resonating chamber, the slot being designed to accommodate a slidable conductive plate that may be inserted into the body of the resonator to any desired distance.
  • the tuning depends upon the degree ofinsertion of the conductive plate.
  • the arrangement is adaptable either for coarse or fine tuning adjustments and also to produce frequency modulation in a resonant cavity. The latter effect may be obtained, for example, by making the-conductive plate in a cam-shaped form which may be rotated in any suitable manner.
  • a tuning plate may be vibrated in its own plane to produce frequency modulation.
  • a feature of the invention is the provision of a pair of protective plates of conductive material, one at either side of the slot and mounted parallel to the tuning plate to minimize the escape of electromagnetic radiations through the slot while permitting free motion of the tuning plate.
  • the envelope of the tube encloses an electron beam emitting device or electron gun indicated generally at 2 and mounted upon an inwardly extending stem 3 in conventional manner.
  • the tube also contains a collector electrode 4, a pair of electrodes 5 and 8 defining an input gap I and a pair of electrodes 8 and 9 defining an output gap.
  • the electrodes 5 and 9 are connected with an outer casing l0, while the electrodes 6 and 8 are connected to an inner casing II, the electrodes, connections and casings all being preferably of high conductivity.
  • the resonant chamber is comprised between the casings l and H.
  • a conductive tuning plate l2 projects into the interior of the resonant chamber through a suitable slot in the casing l0 and is guided by suitable flanges It. Means such as a rack and pinion device it adjustable by means of a knob I is connected with the plate I! in any suitable manner.
  • a plate l8 may be provided of cam-like form with any desired shape and may be suitably mounted so as to partially extend into the interior of the resonating chamber.
  • the plate may be rotated by a motor ill or other suitable means.
  • of conductive material closely spaced from the plate l8 may be provided, if desired, to minimize the escape of electromagnetic radiations through the slot into which the plate I8 projects and at the same time to permit free rotation of the plate.
  • a fine adjustment may be obtained by employing a single tuning plate and larger adjustments may be secured by the use of a plurality of plates moved simultaneously or successively in any suitable manner.
  • Means for modulating the frequency of oscillations in a resonating cavity comprising a rotatable conductive cam-shaped pl'ate variably extending into the interior of the resonating chamber through a slot in the wall and a pair of protective plates of conductive material, one at either side of said slot and mounted parallel to said rotatable plate to minimize the escape of electromagnetic radiations through said slot while permitting free motion of said rotatable plate.

Description

Dec. 22, 1942. A. L. SAMUEL I 2,306,282
TUNING ARRANGEMENT FOR CAVITY RESONATORS Filed June 28, 1941 /N 5 N TOP A. 1.. SAMUEL g A TTORNEV Patented Dec. 22, 1942 TUNING ARRANGEMENT FOR CAVITY RESONATORS Arthur L. Samuel, Summit, N. 3., assignor to Bell Telephone Laboratories,
Incorporated, New
York, N. Y., a corporation of New York Application June 28, 1941, Serial No. 400,280
3 Claims.
This invention relates to tuning arrangements for resonating chambers, sometimes called cavity resonators, and is particularly applicable to ultrahigh frequency wave technique.
In accordance with the invention one or more slots are provided in the walls of the resonating chamber, the slot being designed to accommodate a slidable conductive plate that may be inserted into the body of the resonator to any desired distance. The tuning depends upon the degree ofinsertion of the conductive plate. The arrangement is adaptable either for coarse or fine tuning adjustments and also to produce frequency modulation in a resonant cavity. The latter effect may be obtained, for example, by making the-conductive plate in a cam-shaped form which may be rotated in any suitable manner. Alternatively, a tuning plate may be vibrated in its own plane to produce frequency modulation.
' A feature of the invention is the provision of a pair of protective plates of conductive material, one at either side of the slot and mounted parallel to the tuning plate to minimize the escape of electromagnetic radiations through the slot while permitting free motion of the tuning plate. Other features and objects of the invention will become evident from the following description in conjunction with the accompanying drawing 'while the scope of the invention is defined in the appended claims.
In the drawing the single figureshows a resonating chamber associated with an electron beam tube and provided with a plurality of tuning plates.
The envelope of the tubeis indicated at I and encloses an electron beam emitting device or electron gun indicated generally at 2 and mounted upon an inwardly extending stem 3 in conventional manner. The tube also containsa collector electrode 4, a pair of electrodes 5 and 8 defining an input gap I and a pair of electrodes 8 and 9 defining an output gap. The electrodes 5 and 9 are connected with an outer casing l0, while the electrodes 6 and 8 are connected to an inner casing II, the electrodes, connections and casings all being preferably of high conductivity. The resonant chamber is comprised between the casings l and H. A conductive tuning plate l2 projects into the interior of the resonant chamber through a suitable slot in the casing l0 and is guided by suitable flanges It. Means such as a rack and pinion device it adjustable by means of a knob I is connected with the plate I! in any suitable manner. Al-
. engagement in a slot I], which plate may be manually adjusted without the use of any mechanical gearing.
' To eilect frequency modulation a plate l8 may be provided of cam-like form with any desired shape and may be suitably mounted so as to partially extend into the interior of the resonating chamber. The plate may be rotated by a motor ill or other suitable means. Protective plates and 2| of conductive material closely spaced from the plate l8 may be provided, if desired, to minimize the escape of electromagnetic radiations through the slot into which the plate I8 projects and at the same time to permit free rotation of the plate.
A fine adjustment may be obtained by employing a single tuning plate and larger adjustments may be secured by the use of a plurality of plates moved simultaneously or successively in any suitable manner.
What is claimed is:
1. The combination of a cavity resonator, a conductive plate projecting into the interior of the resonator through a slot in the wall thereof, means for varying the extent of projection of the plate within the chamber and a pair of protective plates of conductive material, one at either side of said slot and mounted parallel to said variable plate to minimize the escape of electromagnetic radiations through said slot while permitting free motion of said variable plate. v
2. Means for modulating the frequency of oscillations in a resonating cavity comprising a rotatable conductive cam-shaped pl'ate variably extending into the interior of the resonating chamber through a slot in the wall and a pair of protective plates of conductive material, one at either side of said slot and mounted parallel to said rotatable plate to minimize the escape of electromagnetic radiations through said slot while permitting free motion of said rotatable plate.
3. Means for producing cyclic variations in
US400280A 1941-06-28 1941-06-28 Tuning arrangement for cavity resonators Expired - Lifetime US2306282A (en)

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Cited By (53)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2420314A (en) * 1943-04-26 1947-05-13 Sperry Gyroscope Co Inc High-frequency resonator-tube
US2421635A (en) * 1943-03-20 1947-06-03 Gen Electric Ultra high frequency space resonant system
US2424805A (en) * 1942-11-13 1947-07-29 Gen Electric High-frequency magnetron
US2426992A (en) * 1942-05-27 1947-09-09 Sperry Gyroscope Co Inc Glide path transmitter
US2428609A (en) * 1942-11-09 1947-10-07 Gen Electric High-frequency electric discharge device
US2436640A (en) * 1942-05-07 1948-02-24 Nils Georg Schonander Device for the frequency modulation of the resonant frequency of cavity resonators
US2438832A (en) * 1943-09-16 1948-03-30 Rca Corp Oscillator for centimeter waves
US2444080A (en) * 1944-10-27 1948-06-29 Raytheon Mfg Co Electron discharge device of the magnetron type
US2444066A (en) * 1940-05-11 1948-06-29 Int Standard Electric Corp Tuner for cavity resonators
US2445282A (en) * 1944-05-19 1948-07-13 Bell Telephone Labor Inc Tuning arrangement for cavity resonators
US2445077A (en) * 1942-06-25 1948-07-13 Rca Corp Electron discharge device utilizing cavity resonators
US2445810A (en) * 1942-12-04 1948-07-27 Standard Telephones Cables Ltd Ultra high frequency electric oscillator
US2447492A (en) * 1944-04-15 1948-08-24 Rca Corp Timing modulation
US2451825A (en) * 1945-08-01 1948-10-19 John J Guarrera Oscillator tube with tunable coaxial resonator
US2456770A (en) * 1944-02-14 1948-12-21 Rca Corp Impedance matching device
US2457189A (en) * 1943-03-23 1948-12-28 Int Standard Electric Corp Ultra high frequency oscillation generator
US2463472A (en) * 1945-03-16 1949-03-01 Premier Crystal Lab Inc Cavity resonator
US2483419A (en) * 1944-07-24 1949-10-04 Standard Telephones Cables Ltd Adjustable reactance line
US2494570A (en) * 1946-01-22 1950-01-17 George R Mezger Electrical transducer
US2496772A (en) * 1944-07-12 1950-02-07 Philco Corp Cavity resonator
US2496837A (en) * 1946-09-20 1950-02-07 Sperry Corp Ultra high erequency apparatus
US2510299A (en) * 1945-01-01 1950-06-06 Bell Telephone Labor Inc Pulse-echo testing system
US2515213A (en) * 1943-05-20 1950-07-18 Rca Corp Ultra high frequency communication system
US2520604A (en) * 1947-04-30 1950-08-29 Rca Corp Microwave mode changer and integrator
US2537139A (en) * 1944-07-14 1951-01-09 Bell Telephone Labor Inc Object locator system
US2574433A (en) * 1943-10-01 1951-11-06 Roger E Clapp System for directional interchange of energy between wave guides and free space
US2578249A (en) * 1946-12-04 1951-12-11 Polytechnic Inst Brooklyn Variable attenuator with linear drive
US2583027A (en) * 1944-01-12 1952-01-22 Int Standard Electric Corp Tuning system for coaxial cavity resonators
US2589248A (en) * 1946-01-11 1952-03-18 Andrew V Haeff Signal generator
US2593361A (en) * 1948-12-30 1952-04-15 Rca Corp Wide range high-frequency seriesresonant tuning circuit
US2593443A (en) * 1942-01-29 1952-04-22 Sperry Corp High-frequency tube structure
US2599905A (en) * 1945-11-29 1952-06-10 Us Navy Modulator
US2605394A (en) * 1943-10-02 1952-07-29 Stanley N Van Voorhis High-frequency radio beacon signaling
US2605459A (en) * 1943-10-23 1952-07-29 Jackson H Cook Monitoring apparatus for radio pulse transmission systems
US2613251A (en) * 1947-02-11 1952-10-07 Polytechnic Inst Brooklyn Resistance comparator
US2619538A (en) * 1944-05-23 1952-11-25 Westinghouse Electric Corp Wave guide attenuator
US2630488A (en) * 1944-11-27 1953-03-03 Albert M Clogston Cavity resonator tuning device
US2638544A (en) * 1948-09-15 1953-05-12 Raytheon Television And Radio Cavity tuner
US2660713A (en) * 1948-05-15 1953-11-24 Westinghouse Electric Corp Wave guide attenuator
US2680229A (en) * 1947-11-05 1954-06-01 Int Standard Electric Corp Frequency-modulated generator
US2685034A (en) * 1946-05-31 1954-07-27 James H Schaefer Coaxial line oscillator
US2720628A (en) * 1950-09-05 1955-10-11 Beverly D Kumpfer Tunable cavity resonator
US2782383A (en) * 1957-02-19 Cavity resonator
US2788447A (en) * 1952-09-12 1957-04-09 Polytechnic Res & Dev Co Inc Radio wave tuners
US2794175A (en) * 1950-09-05 1957-05-28 Beverly D Kumpfer Tunable cavity resonator
US2804545A (en) * 1945-10-11 1957-08-27 Jr John F Clark Superregenerative radio receiver
US2831171A (en) * 1946-02-21 1958-04-15 Brown Allan Harvey Echo box having constant transient decay time
US2864063A (en) * 1957-12-20 1958-12-09 Polytechnic Inst Brooklyn Microwave control devices
US2966637A (en) * 1956-01-31 1960-12-27 Thompson Ramo Wooldridge Inc Coaxial line switch
US3010048A (en) * 1959-04-02 1961-11-21 Hughes Aircraft Co Traveling wave tube waveguide system
DE1243787B (en) * 1955-07-08 1967-07-06 Varian Associates Tunable electron tube in the manner of a klystron
DE3237250A1 (en) * 1981-10-09 1983-05-05 The Medical College of Wisconsin, Inc., 53225 Milwaukee, Wis. CIRCUIT-CONCENTRATED RESONATOR
DE4107628A1 (en) * 1991-03-09 1992-09-10 Bruker Analytische Messtechnik HF resonator for electron spin resonance measurements - has tuning element in form of dielectric wobbler moved periodically through resonance mode field by drive system

Cited By (53)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2782383A (en) * 1957-02-19 Cavity resonator
US2444066A (en) * 1940-05-11 1948-06-29 Int Standard Electric Corp Tuner for cavity resonators
US2593443A (en) * 1942-01-29 1952-04-22 Sperry Corp High-frequency tube structure
US2436640A (en) * 1942-05-07 1948-02-24 Nils Georg Schonander Device for the frequency modulation of the resonant frequency of cavity resonators
US2426992A (en) * 1942-05-27 1947-09-09 Sperry Gyroscope Co Inc Glide path transmitter
US2445077A (en) * 1942-06-25 1948-07-13 Rca Corp Electron discharge device utilizing cavity resonators
US2428609A (en) * 1942-11-09 1947-10-07 Gen Electric High-frequency electric discharge device
US2424805A (en) * 1942-11-13 1947-07-29 Gen Electric High-frequency magnetron
US2445810A (en) * 1942-12-04 1948-07-27 Standard Telephones Cables Ltd Ultra high frequency electric oscillator
US2421635A (en) * 1943-03-20 1947-06-03 Gen Electric Ultra high frequency space resonant system
US2457189A (en) * 1943-03-23 1948-12-28 Int Standard Electric Corp Ultra high frequency oscillation generator
US2420314A (en) * 1943-04-26 1947-05-13 Sperry Gyroscope Co Inc High-frequency resonator-tube
US2515213A (en) * 1943-05-20 1950-07-18 Rca Corp Ultra high frequency communication system
US2438832A (en) * 1943-09-16 1948-03-30 Rca Corp Oscillator for centimeter waves
US2574433A (en) * 1943-10-01 1951-11-06 Roger E Clapp System for directional interchange of energy between wave guides and free space
US2605394A (en) * 1943-10-02 1952-07-29 Stanley N Van Voorhis High-frequency radio beacon signaling
US2605459A (en) * 1943-10-23 1952-07-29 Jackson H Cook Monitoring apparatus for radio pulse transmission systems
US2583027A (en) * 1944-01-12 1952-01-22 Int Standard Electric Corp Tuning system for coaxial cavity resonators
US2456770A (en) * 1944-02-14 1948-12-21 Rca Corp Impedance matching device
US2447492A (en) * 1944-04-15 1948-08-24 Rca Corp Timing modulation
US2445282A (en) * 1944-05-19 1948-07-13 Bell Telephone Labor Inc Tuning arrangement for cavity resonators
US2619538A (en) * 1944-05-23 1952-11-25 Westinghouse Electric Corp Wave guide attenuator
US2496772A (en) * 1944-07-12 1950-02-07 Philco Corp Cavity resonator
US2537139A (en) * 1944-07-14 1951-01-09 Bell Telephone Labor Inc Object locator system
US2483419A (en) * 1944-07-24 1949-10-04 Standard Telephones Cables Ltd Adjustable reactance line
US2444080A (en) * 1944-10-27 1948-06-29 Raytheon Mfg Co Electron discharge device of the magnetron type
US2630488A (en) * 1944-11-27 1953-03-03 Albert M Clogston Cavity resonator tuning device
US2510299A (en) * 1945-01-01 1950-06-06 Bell Telephone Labor Inc Pulse-echo testing system
US2463472A (en) * 1945-03-16 1949-03-01 Premier Crystal Lab Inc Cavity resonator
US2451825A (en) * 1945-08-01 1948-10-19 John J Guarrera Oscillator tube with tunable coaxial resonator
US2804545A (en) * 1945-10-11 1957-08-27 Jr John F Clark Superregenerative radio receiver
US2599905A (en) * 1945-11-29 1952-06-10 Us Navy Modulator
US2589248A (en) * 1946-01-11 1952-03-18 Andrew V Haeff Signal generator
US2494570A (en) * 1946-01-22 1950-01-17 George R Mezger Electrical transducer
US2831171A (en) * 1946-02-21 1958-04-15 Brown Allan Harvey Echo box having constant transient decay time
US2685034A (en) * 1946-05-31 1954-07-27 James H Schaefer Coaxial line oscillator
US2496837A (en) * 1946-09-20 1950-02-07 Sperry Corp Ultra high erequency apparatus
US2578249A (en) * 1946-12-04 1951-12-11 Polytechnic Inst Brooklyn Variable attenuator with linear drive
US2613251A (en) * 1947-02-11 1952-10-07 Polytechnic Inst Brooklyn Resistance comparator
US2520604A (en) * 1947-04-30 1950-08-29 Rca Corp Microwave mode changer and integrator
US2680229A (en) * 1947-11-05 1954-06-01 Int Standard Electric Corp Frequency-modulated generator
US2660713A (en) * 1948-05-15 1953-11-24 Westinghouse Electric Corp Wave guide attenuator
US2638544A (en) * 1948-09-15 1953-05-12 Raytheon Television And Radio Cavity tuner
US2593361A (en) * 1948-12-30 1952-04-15 Rca Corp Wide range high-frequency seriesresonant tuning circuit
US2720628A (en) * 1950-09-05 1955-10-11 Beverly D Kumpfer Tunable cavity resonator
US2794175A (en) * 1950-09-05 1957-05-28 Beverly D Kumpfer Tunable cavity resonator
US2788447A (en) * 1952-09-12 1957-04-09 Polytechnic Res & Dev Co Inc Radio wave tuners
DE1243787B (en) * 1955-07-08 1967-07-06 Varian Associates Tunable electron tube in the manner of a klystron
US2966637A (en) * 1956-01-31 1960-12-27 Thompson Ramo Wooldridge Inc Coaxial line switch
US2864063A (en) * 1957-12-20 1958-12-09 Polytechnic Inst Brooklyn Microwave control devices
US3010048A (en) * 1959-04-02 1961-11-21 Hughes Aircraft Co Traveling wave tube waveguide system
DE3237250A1 (en) * 1981-10-09 1983-05-05 The Medical College of Wisconsin, Inc., 53225 Milwaukee, Wis. CIRCUIT-CONCENTRATED RESONATOR
DE4107628A1 (en) * 1991-03-09 1992-09-10 Bruker Analytische Messtechnik HF resonator for electron spin resonance measurements - has tuning element in form of dielectric wobbler moved periodically through resonance mode field by drive system

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