US3353057A - Traveling-wave tube having a comb delay line formed on a ridge in a first waveguideand a plurality of connecting ridge waveguides - Google Patents

Traveling-wave tube having a comb delay line formed on a ridge in a first waveguideand a plurality of connecting ridge waveguides Download PDF

Info

Publication number
US3353057A
US3353057A US381001A US38100164A US3353057A US 3353057 A US3353057 A US 3353057A US 381001 A US381001 A US 381001A US 38100164 A US38100164 A US 38100164A US 3353057 A US3353057 A US 3353057A
Authority
US
United States
Prior art keywords
ridge
waveguide
comb
electron
wave
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 - Lifetime
Application number
US381001A
Other languages
English (en)
Inventor
Kato Yoshio
Konosu Osamu
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electronics Corp
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 Matsushita Electronics Corp filed Critical Matsushita Electronics Corp
Application granted granted Critical
Publication of US3353057A publication Critical patent/US3353057A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K51/00—Other details not peculiar to particular types of valves or cut-off apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/30—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces specially adapted for pressure containers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K43/00—Auxiliary closure means in valves, which in case of repair, e.g. rewashering, of the valve, can take over the function of the normal closure means; Devices for temporary replacement of parts of valves for the same purpose
    • F16K43/005—Auxiliary closure means in valves, which in case of repair, e.g. rewashering, of the valve, can take over the function of the normal closure means; Devices for temporary replacement of parts of valves for the same purpose an auxiliary valve closing automatically when the main valve is being disassembled
    • F16K43/006—Auxiliary closure means in valves, which in case of repair, e.g. rewashering, of the valve, can take over the function of the normal closure means; Devices for temporary replacement of parts of valves for the same purpose an auxiliary valve closing automatically when the main valve is being disassembled the auxiliary valve being held open by the main valve
    • 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
    • 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
    • H01J25/34—Travelling-wave tubes; Tubes in which a travelling wave is simulated at spaced gaps
    • H01J25/36—Tubes in which an electron stream interacts with a wave travelling along a delay line or equivalent sequence of impedance elements, and without magnet system producing an H-field crossing the E-field
    • H01J25/40—Tubes in which an electron stream interacts with a wave travelling along a delay line or equivalent sequence of impedance elements, and without magnet system producing an H-field crossing the E-field the backward travelling wave being utilised
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/08—Dielectric windows

Definitions

  • the electron tube includes a wave energy absorbing attenuator provided at one end of the slow wave circuit on the collector electrode side.
  • the comb-type circuit is arranged so that the depth of the comb teeth gradually decreases at the end towards the electron gun and it is coupled to a ridge waveguide contiguous therewith and composed of a ridge, which has the same transverse width as the comb-type circuit, directed towards the bottom of 2 the comb so that an electromagnetic wave is introduced into a fold-back waveguide from the fore end of the ridge waveguide to the collector electrode side.
  • this electron tube includes an airtight connection window provided at the output end thereof. Such an arrangement makes the'device compact and can eliminate reflection of waves in the discontinuous portion of the waveguide and thus provide a good matching characteristic with a constant output of a wide frequency range.
  • This invention relates to extremely high frequency electron tubes, and has for its object to provide tubes particularly adapted for industrial mass production.
  • a comb type circuit is known as a slow wave circuit of such a construction that a number of lateral slots are cut into the ridge of a ridge waveguide, with a constant period, and the ridge is grooved or perforated longitudinally for passing an electron beam therethrough.
  • the tube is usually of slender and long construction in view of the arrangement of the electron-beam focusing apparatus, the electron beam being passed centrally in the axial direction, and the input and output transmission lines are formed by use of rectangular waveguides.
  • any of the extremely high frequency electron tubes heretobefore proposed with utilization of comb type circuits has not been of a construction adapted for industrial mass production nor of a convenient shape for practical use.
  • a comb type circuit is a slow wave circuit surrounded by a metal wall and an extremely high geometrical correctness is required with respect to the central axis of the electron-beam groove or hole. Consequently, in the electron gun side of such an electron tube, a special construction and dimensional precision are required for the couplings between input and output waveguides and the comb type circuit.
  • troublesome and time-consuming mechanical devices have been required for cutting out from a single metal block an integral body composed of the comb portion and surrounding walls of complicated configurations.
  • Conventional input and output couplings heretobefore used are rectangular waveguide systems in which the waveguide openings are disposed in a broad wall face in opposition to the comb teeth, namely the upper wall of the comb type circuit at the opposite ends thereof and the axes of the input and output waveguides at the openings are perpendicular to the electron beam axis.
  • the waveguides are bent in the respective directions between coupling portions and the tube envelope by 90 degrees and directed to the collector electrode side.
  • the present invention provides an extremely high frequency (EHF) electron tube adapted for practical use, that can solve the various problems described above.
  • EHF extremely high frequency
  • An additional object of the present invention is to provide an EHF electron tube having a small reflection and a small loss over a broad frequency band.
  • Another object of the invention is to provide an electron tube having good characteristics over a broad frequency band, with a high yield rate in industrial production and adaptability for mass production with respect to construction.
  • a further object of the invention is to provide an EHF electron tube of short dimension, yet with good characteristics over a broad frequency hand.
  • FIGS. 1 and 2 show a backward wave oscillator tube embodying the present invention, in cross section and longitudinal section, respectively;
  • FIG. 3 shows a process of manufacturing the combined comb teeth and ridge in the embodiment shown in FIGS.
  • FIG. 4 is a detailed perspective sectional view of a portion of FIG. 2, with representation of various dimensions;
  • FIGS. 5 and 6 are graphs showing performances of the electron tubes shown in FIGS. 1 to 4;
  • FIG. 7 shows the detailed construction of a part shown in FIG. 2;
  • FIG. 8 is a sectional view taken at line A-A in FIG. 7;
  • FIGS. 9 and 10 are graphs showing performances of the electron tube of the invention.
  • FIG. 12 is a longitudinal sectional view of a traveling wave amplifier tube embodying the invention.
  • FIG. 13 is a cross-sectional view of another embodiment of the invention.
  • the teeth have gradually decreasing height in order to lessen the electromagnetic wave reflection.
  • a tapered portion at the side near to the collector electrode 10, on the lower longitudinal side of the strip 1, there is formed a tapered portion at for converting a ridge waveguide to a rectangular by brazing or otherwise fastening metal members 2 and 3 to the metal strip 1 with precise positional relations.
  • the upper wall of the comb type circuit is formed by a metal member 4.
  • the composite part consisting of members 1, 2 and 3 is enclosed in a metal member of a channel-shape cross section, members 4 and 5 being fixed :together by a suitable number of set screws.
  • a pair of opposite supporter metal plates 6 and 7 are provided with a central electron-beam slit 14 and a cen- 'tral port 15 for an attenuator, respectively, and have peripheral shapes fitting the inside wall of the cylindrical envelope 8 of the tube.
  • the combination of the above-described members 1 through 7 constitutes a structure having a comb type circuit k, a, b at the upper portion, a ridge waveguide c-d at the side portion, and a ridge waveguide d-e and a taperridge waveguide e-f at lower portion, and is inserted in the cylindrical envelope'8. 'For'taking out the output, a
  • the electron beam 12 interactswiththehigh-frequency electric field on the comb type circuit, under an appropri' ate accelerating voltage in the well-known manner, and
  • the generated electromagnetic wave is transmitted by Way rectangular waveguide outside-the electron tu'be.
  • the ridge of the ridge waveguide directed to the bottom of the slots of the comb type circuit at-the electron-gun side of the comb type circuit, and the ridge of the fold-back waveguide, as well as the comb teeth, are formed as one body from a single metal strip, whereby reflection of the electromagnetic -.wave is negligibly small, and good matching characteristics are obtained with a constant output over a wide frequency band.
  • the passage of an electro-magnetic wave can be bent into a reclined-U-shape, so that the whole structure may be accommodated within a cylindrical envelope in a compact form of extremely practical usage.
  • connection between the waveguide 9 and the external waveguide 30 shown in the right-hand portion of FIG. 2 is now to be explained.
  • This connection is designed substantially for the elimination of reflection and loss of the electromagnetic wave over the whole frequency band used in the rectangular waveguide, while assuring easy sealing between the dielectric disk and the metal parts in the hermetic window construction of the waveguide for an electron tube of themillimeter wave region.
  • a thin cylindrical-space 31 is formed in an end flange 35 of the rectangular waveguide '9, and has a thickness W which is small in comparison to its diameter D
  • the flange 35 is made of iron-nickel-cobalt alloy, or copper,-etc., and is provided with an annular angular cut 34 around the cylindrical-space 31 in the butt face 32 of flange 35, for receiving a dielectric disk 33 of diameter D, at a right angle to the axis of waveguide 9, in a sealing condition.
  • the dielectric disk 33 is made of glass, ceramics, sapphire, quartz orthe like, and is posi-.
  • the external waveguide 30, in axial alignment with the waveguide 9, has an end flange 36 having a thin cylindrical space 37 of the same dimensions as the space 31 and in register with the latter.
  • the dielectric disk 33 can be positively sealed to the flange 35 along the peripheral face having width t, as well as, the annular edge portion of the disk plane having a radial width of A: (D D).
  • D D there might occur certain disturbance of the electromagnetic field by virtue of the existence of the annular angular cut 34 of /2(D -D radial width, but such a disturbance does not affect the transmission characteristics disadvantageously, if the thickness W and diameter D of the spaces 31 and 37 are selected in an appropriate dimensional relation, and good transmission characteristics can be obtained over a broad frequency band.
  • the electric field component of the transmittedelectromagnetic wave . is distributed to become substantially perpendicular to the plane :of dielectric disk 33, and the voltage standing-wave ratio (VSWR) and the transmission loss are sufliciently de creased over the whole'frequency band used in theme- 'tangular waveguides 9 and 30.
  • VSWR voltage standing-wave ratio
  • the voltage standing wave ratio is lower than 1.14 (FIG. 5) and the transmission loss is lower than 0.4 decibel (FIG. 6).
  • the new connecting construction is extremely simple and easy to manufacture and is adapted for industrial mass production.
  • the comb teeth of the comb type circuit decrease in height gradually near to k at the collector-electrode end of teeth a, and at the end of metal member 4 the circuit is converted to a rectangular waveguide 40.
  • the supporter metal plate 7 between the waveguide 40 and the collector hole 11 is provided with a short cylindrical port 15 passing therethrough and having a diameter D,, larger than the lateral width or of rectangular waveguide 40, the axis of port 15 being in coincidence with the axis of waveguide 40.
  • one or more dielectric plates 42 are arranged in parallel to the narrower wall of the rectangular waveguide 40, the edges of the plates 42 being fixed to the plate 7 in grooves 43 formed therein by glass-sealing, brazing, or simple insertion.
  • the collector hole 11 formed in the collector electrode is of a pore form of a diameter E sufiicient to contain the cross-sectional area of electron beam 13 so that feedback of the secondary electron may be prevented.
  • the forward progressive wave directed to the collector electrode which is a component of the electro-magnetic wave generated in the comb type circuit that is not necessary for the backward wave oscillator tube, is after introduction into the cylindrical port 15, divided into two components that proceed in the upward and downward directions, respectively, as shown by chain lines 44 in FIG. 7, their electric field components being distributed as shown by arrowed lines 45 so that the resistance films 41 act effectively to damp the energy of the forward progressive wave.
  • FIG. 9 shows the relation between frequency and the voltage standing wave ratio as measured from the side of the rectangular waveguide 40. In the measurements, two dielectric plates 42 were employed with the following constructional dimensions:
  • the absissa shows the frequency normallized by the lower cutoff frequency fl of the rectangular wave guide, that is, f/fl and their opposite ends substantially correspond to the normal range of use of the rectangular waveguide.
  • the voltage standing wave ratio is below 1.1 over the substantial portion of the frequency band used in the rectangular waveguide, and it is suitable as the terminating attenuator for a slow wave circuit of a backward wave oscillator tube by reason of its broad operating frequency range.
  • This attenuator can also be of short dimension in the longitudinal direction of a slow wave circuit, is easy to manufacture by reason of its simple construction, and consequently, is very useful from the industrial view point as an attenuator for the termination of a slow wave circuit.
  • FIG. 10 there is shown the whole performance, as measured at an outer flange of the waveguide 30, of the extremely high-frequency backward wave oscillator as shown in FIGS. 1 and 2.
  • the frequency band ranges from 55 go. to 77 gc.
  • the VSWR of the present embodiment of the invention is sufiiciently low and satisfactory as a backward wave tube.
  • a traveling wave amplifier and a backward wave amplifier may be of one and the same construction, provided that the operational conditions are converted from each other, the only difference therebetween being that the directions of input and output are reversed from each other.
  • a backward wave amplifier tube can be obtained by use of the construction shown in FIG. 12.
  • An extremely high frequency electron tube .of the traveling wave type comprising a substantially cylindrical enclosure having at one end thereof anrelectron gun and atthe opposite end thereof a collector electrode arranged in alignment with said electron gun, a comb-type circuit formed on a ridge in a first ridge waveguide, said ridge of said first ridge waveguide being a metal strip having a plurality of transverse slots therein thereby forming comb teeth, said comb-type circuit being mounted in said cylinder between said electron gun and said collector electrode along the path of travel of the electron beam from said gun, said comb teeth being gradually diminished in height at the end-of said circuit towards said electron gun, a second ridge waveguide transversely mounted in said cylinder directed towards the bottom of said comb teeth and being continuous therewith, said second ridge having the same transverse width as said comb teeth, and a fold-back waveguide directed towards the collector electrode and connected to the fore end of said second ridge waveguide, said fold-back waveguide including a tapered portion.
  • the main portion of said fold-back waveguide is a third ridge waveguide having a ridge in continuation with the ridge of the second ridge waveguide and is constituted by butting two metal members, uponboth sides ofsaid metal strip having comb teeth, said members having faces defining the bottom wall of said first ridge waveguide and forming the ridge after assembly.
  • a short cylindricalport surroundedby a conductor is connected to a rectangular waveguide at the collector electrode side of said comb type circuit, said port having a diameter larger than the-lateral width of said rectangular waveguide and an axis incoincidence with theaxis of said rectangular waveguide, at least one dielectric plate mounted ,within said cylindrical sport, said plate being covered with films of resistance material attached on its surfaces and having a small thickness in comparison to the wavelength of theelectromagnetic wave of said rectangular waveguide,-and being in parallel withthe shorter wall of said rectangular waveguide,thusconstituting a backw-ardwave oscillator.
  • the main portion of said fold-back waveguide is a third ridge waveguide having aridge in continuation with the ridge of the second ridgewaveguide and in ,which a short cylindrical port surrounded-by a conductor is connected to a rectangular waveguide atthe collectorelectrode side ofsaid comb type circuit, said port having a diameter 7 larger than the lateral width of said rectangular waveguide and an axis in coincidence-withthe axis of said rectangular waveguide, at least one dielectric plat mounted in said cylindrical port, said platebeing covered withtfilms of resistance material attached on itssurfaces and having a small thickness in comparison to the wavelength of the electromagnetic wave ofsaid rectangular waveguide, and being in parallel with the shorter ,wall ;of said rectangular waveguide, thus constitutinga backward wave oscillator.
  • the main portion of said fold-back waveguide is a third ridge waveguide having a ridge in continuation with the ridge of the second ridge waveguide and in which the output end of said fold-back waveguide is converted to a rectangular waveguide, a thin cylindrical space formed in an enclosureat the connecting portion between said rectangular waveguide and .an external rectangular waveguide, said enclosure being composed of two parts with butt faces therebetween, an annular angular cut being formed in the butt face of the, electron-tube side, and a dielectric disk being placed in said annularangular cut perpendicular to the axis of said rectangular waveguides and sealed to said annular angular cut.
  • the main portion of said fold-back waveguide is a third ridge waveguide having a ridge in continuation with the ridge of the second ridge waveguide and constituted by butting two metal members upon both sides of the metal strip having comb teeth at the essential portion, said metal members having faces defining the bottom wall of said first ridge waveguide and forming the ridge after assembly,
  • the main portion of said fold-back waveguide is a third ridge waveguide having a ridge in continuation with the ridge of the second ridgewaveguide and constituted by butting two metal members upon both sides of the metal strip having the comb teeth at the essential portion, said metal members having faces defining the bottom wall of said first ridge waveguide and forming the ridge after assembly, the output end of said fold-back waveguide being converted to a rectangular waveguide, a thin cylindrical space formed in an enclosure at the connecting portion between said rectangular waveguide and anexternal rectangular waveguide, said enclosure being composed of two parts with butt faces therebetween, an annular angular out being formed in the butt face of the electron-tube side, and a dielectric disk being placed in said annular angular cut perpendicular to the axis of said rectangular waveguides andsealed to said annular angular cut.
  • the main portion of said fold-back waveguide is a third ridge waveguide having a ridge in continuation with the ridge of the second ridge waveguide, in which a short cylindrical port surrounded by a conductor is connected to a rectangular waveguide at the collector electrode side of said comb type circuit, said port having a diameter larger than the lateral Width of said rectangular waveguide and an axis in coincidence with the axis of said rectangular waveguide, at least one dielectric plate mounted within said cylindrical port and covered with films of resistance material attached on its surfaces and having small thickness in comparison to the wavelength of the electromagnetic wave of said rectangular waveguide, and being in parallel with the shorter wall of said rectangular waveguide, thus constituting a backward wave oscillator, the output end of said fold-back waveguide being converted to a rectangular waveguide, a thin cylindrical space formed in an enclosure at the connecting portion between said rectangular waveguide and an external rectangular waveguide, said enclosure being composed of two parts with butt faces therebetween, an annular angular cut being formed in

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Microwave Tubes (AREA)
  • Waveguide Connection Structure (AREA)
  • Particle Accelerators (AREA)
US381001A 1963-07-12 1964-07-08 Traveling-wave tube having a comb delay line formed on a ridge in a first waveguideand a plurality of connecting ridge waveguides Expired - Lifetime US3353057A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP3827863 1963-07-12
JP5179463 1963-09-26
JP5899163 1963-11-01

Publications (1)

Publication Number Publication Date
US3353057A true US3353057A (en) 1967-11-14

Family

ID=27289768

Family Applications (2)

Application Number Title Priority Date Filing Date
US381001A Expired - Lifetime US3353057A (en) 1963-07-12 1964-07-08 Traveling-wave tube having a comb delay line formed on a ridge in a first waveguideand a plurality of connecting ridge waveguides
US381107A Expired - Lifetime US3281729A (en) 1963-07-12 1964-07-08 Hermetic window construction of waveguide for extremely high frequency electronic tubes

Family Applications After (1)

Application Number Title Priority Date Filing Date
US381107A Expired - Lifetime US3281729A (en) 1963-07-12 1964-07-08 Hermetic window construction of waveguide for extremely high frequency electronic tubes

Country Status (6)

Country Link
US (2) US3353057A (de)
BE (2) BE650409A (de)
DE (1) DE1491373B2 (de)
GB (2) GB1066644A (de)
NL (2) NL6407743A (de)
SE (1) SE316240B (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3548247A (en) * 1968-02-21 1970-12-15 Alexandr Mikhailovich Alexeenk Backward-wave tube with periodic electrostatic focusing
US3711943A (en) * 1970-09-03 1973-01-23 Varian Associates Method for constructing an interaction circuit for a microwave tube
CN104362060A (zh) * 2014-11-25 2015-02-18 中国人民解放军国防科学技术大学 一种介质填充紧凑型相对论返波振荡器
CN105869970A (zh) * 2016-04-18 2016-08-17 中国工程物理研究院应用电子学研究所 一种跨波段双频相对论返波振荡器

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3436694A (en) * 1966-07-28 1969-04-01 Microwave Ass Controlling ghost-mode resonant frequencies in sealed waveguide windows
US3993969A (en) * 1974-11-15 1976-11-23 Siemens Aktiengesellschaft Vacuum-tight window arrangement for rectangular waveguides
DE19542525C2 (de) * 1995-11-15 1997-12-11 Krohne Messtechnik Kg Mikrowellenfenster
CN114420521A (zh) * 2022-01-14 2022-04-29 深圳奥镨科技有限公司 一种太赫兹真空电子器件输出窗口及其制作方法
CN115881496B (zh) * 2023-01-03 2024-08-23 电子科技大学 一种高频结构及扩展互作用速调管

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2687777A (en) * 1948-07-20 1954-08-31 Csf Thermionic tube for ultrashort waves
US2812468A (en) * 1952-12-30 1957-11-05 Bell Telephone Labor Inc Spatial harmonic traveling wave tube
US2945981A (en) * 1955-06-13 1960-07-19 Bell Telephone Labor Inc Magnetron-type traveling wave tube
US2985790A (en) * 1952-05-17 1961-05-23 English Electric Valve Co Ltd Backward wave tube
US2991391A (en) * 1957-07-24 1961-07-04 Varian Associates Electron beam discharge apparatus
US3160781A (en) * 1961-04-24 1964-12-08 Gen Telephone & Elect Microwave tube with shielded laddertype delay structure

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2483768A (en) * 1944-06-15 1949-10-04 Rca Corp Microwave-acoustic wave translator
US2958834A (en) * 1956-06-13 1960-11-01 Varian Associates Sealed wave guide window
US3101461A (en) * 1959-01-05 1963-08-20 Cie De Telegraphie Sans Fil Vacuum tight waveguide transmission window having means guarding window edges from electric stress
US3100881A (en) * 1960-10-19 1963-08-13 Gen Electric Waveguide system having mode converter for changing rectangular te10 mode into circular te01 at locus of waveguide window

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2687777A (en) * 1948-07-20 1954-08-31 Csf Thermionic tube for ultrashort waves
US2985790A (en) * 1952-05-17 1961-05-23 English Electric Valve Co Ltd Backward wave tube
US2812468A (en) * 1952-12-30 1957-11-05 Bell Telephone Labor Inc Spatial harmonic traveling wave tube
US2945981A (en) * 1955-06-13 1960-07-19 Bell Telephone Labor Inc Magnetron-type traveling wave tube
US2991391A (en) * 1957-07-24 1961-07-04 Varian Associates Electron beam discharge apparatus
US3160781A (en) * 1961-04-24 1964-12-08 Gen Telephone & Elect Microwave tube with shielded laddertype delay structure

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3548247A (en) * 1968-02-21 1970-12-15 Alexandr Mikhailovich Alexeenk Backward-wave tube with periodic electrostatic focusing
US3711943A (en) * 1970-09-03 1973-01-23 Varian Associates Method for constructing an interaction circuit for a microwave tube
CN104362060A (zh) * 2014-11-25 2015-02-18 中国人民解放军国防科学技术大学 一种介质填充紧凑型相对论返波振荡器
CN104362060B (zh) * 2014-11-25 2016-10-19 中国人民解放军国防科学技术大学 一种介质填充紧凑型相对论返波振荡器
CN105869970A (zh) * 2016-04-18 2016-08-17 中国工程物理研究院应用电子学研究所 一种跨波段双频相对论返波振荡器
CN105869970B (zh) * 2016-04-18 2018-01-02 中国工程物理研究院应用电子学研究所 一种跨波段双频相对论返波振荡器

Also Published As

Publication number Publication date
DE1491372B2 (de) 1972-10-19
US3281729A (en) 1966-10-25
GB1067464A (en) 1967-05-03
BE650408A (de) 1964-11-03
NL6407883A (de) 1965-01-13
SE316240B (de) 1969-10-20
DE1491372A1 (de) 1969-10-02
GB1066644A (en) 1967-04-26
BE650409A (de) 1964-11-03
DE1491373A1 (de) 1969-05-22
NL6407743A (de) 1965-01-13
DE1491373B2 (de) 1972-03-02

Similar Documents

Publication Publication Date Title
US2956200A (en) Periodically focused traveling wave tube with tapered phase velocity
US3221204A (en) Traveling-wave tube with trap means for preventing oscillation at unwanted frequencies
US2708236A (en) Microwave amplifiers
US3221205A (en) Traveling-wave tube with trap means for preventing oscillation at unwanted frequencies
US3353057A (en) Traveling-wave tube having a comb delay line formed on a ridge in a first waveguideand a plurality of connecting ridge waveguides
US3353123A (en) Microwave filter comprising absorbing structures for removing suprious wave energy
US3274428A (en) Travelling wave tube with band pass slow wave structure whose frequency characteristic changes along its length
US2957103A (en) High power microwave tube
US3602766A (en) Traveling-wave tube having auxiliary resonant cavities containing lossy bodies which protrude into the slow-wave structure interaction cells to provide combined frequency sensitive and directionally sensitive attenuation
US3670196A (en) Helix delay line for traveling wave devices
US4147956A (en) Wide-band coupled-cavity type traveling-wave tube
US3110000A (en) Waveguide window structure having three resonant sections giving broadband transmission with means to fluid cool center section
CA1135860A (en) Slow-wave circuit for traveling-wave tubes
US2890384A (en) Traveling wave electronic devices
US3123736A (en) Severed traveling-wave tube with external terminations
US3611214A (en) Waveguide reflective harmonic filter
US3441783A (en) Travelling wave amplifier tubes
US2952795A (en) Electron discharge device
US3339102A (en) High frequency electron discharge devices and wave permeable windows
US5477107A (en) Linear-beam cavity circuits with non-resonant RF loss slabs
US3593220A (en) High power microwave low-pass filter of the leaky wall type
US3684913A (en) Coupled cavity slow wave circuit for microwave tubes
US4307322A (en) Coupled cavity traveling wave tube having improved loss stabilization
US2926280A (en) Traveling wave structures
US3753171A (en) Composite microwave window and waveguide transform