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US3281729A - Hermetic window construction of waveguide for extremely high frequency electronic tubes - Google Patents

Hermetic window construction of waveguide for extremely high frequency electronic tubes Download PDF

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US3281729A
US3281729A US381107A US38110764A US3281729A US 3281729 A US3281729 A US 3281729A US 381107 A US381107 A US 381107A US 38110764 A US38110764 A US 38110764A US 3281729 A US3281729 A US 3281729A
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Prior art keywords
waveguide
window construction
high frequency
extremely high
hermetic window
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US381107A
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Kato Yoshio
Konosu Osamu
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Panasonic Holdings Corp
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Matsushita Electronics Corp
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    • 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 primary object of the present invention is to provide a relatively simple hermetic window construction of a waveguide, in which the dielectric and metallic parts can be hermetically sealed together in an easy manner, and yet reflection and loss of radio wave are made extremely little even in millimeter wave region.
  • FIGS. 1 and 2 are perspective views in longitudinal sections of two examples of conventional hermetic window constructions of Waveguides
  • FIG. 3a is a perspective view in longitudinal section of a hermetic window construction embodying the present invention.
  • FIG. 3b is a cross-sectional view taken at line A-A' in FIG. 3a;
  • FIGS. 4 and 5 are graphs showing performances of the embodiment of the invention as shown in FIG. 3.
  • FIGS. 1 and 2 Conventional hermetic window constructions of circular resonance type for super high frequency band are shown in FIGS. 1 and 2, for example.
  • a couple of choke flanges are used in combination, while in the construction shown in FIG. 2, a dielectric disk 1 is sealed within a cylindrical waveguide.
  • the parts should be of extremely minute dimensions.
  • the dielectric disk 1 should be 0.1 mm. in thickness and about 2 mm. in diameter in 4-mm. wavelength region.
  • dimensional precision is very diflicult to obtain, and even in a construction as shown in FIG. 2, the dielectric disk 1 becomes so thin that the area of its contact with metallic part is not sufficient to assure positive hermetic sealing therewith.
  • a rectangular waveguide 3 is provided.with a short cylindrical flange or enclosure 5 forming therein a thin cylindrical space 4 of diameter D and thickness W, the thickness W being thin in comparison to the diameter D
  • the enclosure 5 is made of metal such as iron-nickelcobalt alloy, titanium, copper, or the like, and in its outer end face 11 is formed an annular angular cut 7 of cylindrical configuration, in which a dielectric disk 6 of diameter D and thickness t made of glass, ceramics, sapphire, quartz, or the like is placed in a position perpendicular to the axis of waveguide 3, and is positively sealed to the enclosure 5 between the annular edge portion of the disk plane and the annular shoulder presented by the annular angular cut 7, by means of glass-sealing, brazing, or other suitable means depending upon the nature of material.
  • the dielectric disk 6 can be sealed to the enclosure 5 in a positive manner along the annular edge portion of the disk plane having radial width of /2(D -D
  • the sealing may also be efl ected along the peripheral face having width t, of the disk 6.
  • the dimensions are determined to have the following relations:
  • the glass-sealing or brazing of dielectric disk 6 may be effected between the annular edge portion of the plane of disk 6 and the annular shoulder presented by the annular angular cut 7, which is perpendicular to the axis of Waveguide, and moreover, a length of sealing region may exist between gaseous areas at both sides of the portions to be sealed together, so that positive and superior hermetic sealing may be obtained.
  • the above-described hermetic window construction was tested in a frequency range from 8.2 to 12.4 gigacycles, and the results are shown in FIGS. 4 and 5.
  • the hermetic window construction under experiments had the following dimensions:
  • the dielectric disk 6 was made of borosilicate glass of 1.5 millimeters thickness with 6 5, which glass can be sealed with iron-nickel-cobalt alloy of the enclosure 5.
  • the voltage standing wave ratio is lower than 1.14, and the transmission loss is lower than 0.4 decibel.
  • Such extremely superior characteristics can be obtained in any band of further higher frequency, as is readily understood from the law of similarity of electro-magn'etic wave.
  • the present invention is featured, as is obvious from the embodiment hereinabove described, by the facts that a dielectric disk of glass, ceramics, sapphire, quartz, or the like is hermetically sealed in an annular angular cut formed around the open end of a thin cylindrical space at the abutting faces of a pair of metallic enclosures, in a position perpendicular to the axis of rectangular waveguides, thus providing positive sealing area for the thin dielectric disk, and yet providing hermetic waveguide with little reflection and loss of radio wave, and that the manufacture of a miniature waveguide having hermetic window for millimeter wave electronic tube is facilitated.
  • the new hermetic window construction is applicable to traveling wave tubes, as well as backward wave tubes, particularly of millimeter waves.
  • the present invention is also applicable to hermetic windows for gas scaling, in general.
  • a hermetic window construction for a wave guide for an extremely high frequency electronic tube comprising first and second rectangular wave guides having connecting portions on the ends thereof, said connecting portions being joined in abutting relationship to define a thin cylindrical space therein and therebetween, an annular angular out being formed in the abutting face of at least one said connecting portion, a dielectric disk being placed in said annular angular cut perpendicular to the axis of said rectangular wave guides, said disk being sealed to said annular angular cut along at least the annular edge portion of the plane of said dielectric disk, the thickness 1 and specific permittivity e of the window, the lateral width a of said rectangular wave guides, the diameter D and thickness W of said cylindrical space in the one part of said enclosure, and the diameter D of the annular angular out being selected in the following relations:
  • a hermetic window construction according to claim 1 in which said dielectric disk is additionally sealed to said enclosure along the peripheral face of said disk.
  • a hermetic window construction according to claim 1 in which said dielectric disk is made of a material selected from a group consisting of glass, ceramics, sapphire, and quartz, while said enclosure is made of a metal selected from the group consisting of an iron-nickelcobalt alloy, titanium, and copper. 4. The hermetic window construction according to claim 1, in which said dielectric disk is additionally sealed to said enclosure along the peripheral face of said disk.
  • said dielectric disk is made of a material selected from a group consisting of glass, ceramics, sapphire, and quartz, while said enclosure is made of a metal selected from the group consisting of iron-nickelcobalt alloy, titanium and copper.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Microwave Tubes (AREA)
  • Waveguide Connection Structure (AREA)
  • Particle Accelerators (AREA)

Description

Oct. 25, 1966 YOSHlO KATO ETAL 3,281,729
HERMETIC WINDOW CONSTRUCTION OF WAVEGUIDE FOR EXTREMELY HIGH FREQUENCY ELECTRONIC TUBES Filed July 8, 1964 PR/OR ART R F /6. 2 PRIOR ART 1:41. 2
F/G 30 t HQ/O FIG. 4 5?; 1:2 Q g /.3 g /.2 k8 82 9 /0 /2 /24 Frequency (60) E Q FIG. 5 5 g 0.3 0.2 0./ Q 0.0 g 32 9 /0 /2 /2.4
FrequmQ/(Gc) INVENTORS oSfi/o 1 072) 05 l awo S 4 m zn u 72M600 ATTORNEYS United States Patent 3,281,729 HERMETIC WINDOW CONSTRUCTION OF WAVE- GUIDE FOR EXTREMELY HIGH FREQUENCY ELECTRONIC TUBES Yoshio Kato, Minoo-shi, and Osamu Konosu, Kyoto, Japan, assignors to Matsushita Electronics Corporation, Osaka, Japan, a corporation of Japan Filed July 8, 1964, Ser. No. 381,107 Claims priority, application Japan, July 12, 1963, 38/38,278 Ciaims. (Cl. 333-98) This invention relates to hermetic window construction of waveguide for extremely high frequency electronic tubes, for use in input and output portions of radio wave of the electronic tubes.
The primary object of the present invention is to provide a relatively simple hermetic window construction of a waveguide, in which the dielectric and metallic parts can be hermetically sealed together in an easy manner, and yet reflection and loss of radio wave are made extremely little even in millimeter wave region.
There are other objects and particularities of the present invention, which will be made obvious from the following detailed description, with reference to the accompanying drawings, in which:
FIGS. 1 and 2 are perspective views in longitudinal sections of two examples of conventional hermetic window constructions of Waveguides;
FIG. 3a is a perspective view in longitudinal section of a hermetic window construction embodying the present invention;
FIG. 3b is a cross-sectional view taken at line A-A' in FIG. 3a; and
FIGS. 4 and 5 are graphs showing performances of the embodiment of the invention as shown in FIG. 3.
Conventional hermetic window constructions of circular resonance type for super high frequency band are shown in FIGS. 1 and 2, for example. In the construction shown in FIG. 1, a couple of choke flanges are used in combination, while in the construction shown in FIG. 2, a dielectric disk 1 is sealed within a cylindrical waveguide. In millimeter wave region, however, the parts should be of extremely minute dimensions. For example, the dielectric disk 1 should be 0.1 mm. in thickness and about 2 mm. in diameter in 4-mm. wavelength region. As a result, in a complicated construction as shown in FIG. 1, dimensional precision is very diflicult to obtain, and even in a construction as shown in FIG. 2, the dielectric disk 1 becomes so thin that the area of its contact with metallic part is not sufficient to assure positive hermetic sealing therewith.
According to the present invention, such a diflicult problem is never encountered even in an extremely high frequency region.
Referring now to FIG. 3, a rectangular waveguide 3 is provided.with a short cylindrical flange or enclosure 5 forming therein a thin cylindrical space 4 of diameter D and thickness W, the thickness W being thin in comparison to the diameter D The enclosure 5 is made of metal such as iron-nickelcobalt alloy, titanium, copper, or the like, and in its outer end face 11 is formed an annular angular cut 7 of cylindrical configuration, in which a dielectric disk 6 of diameter D and thickness t made of glass, ceramics, sapphire, quartz, or the like is placed in a position perpendicular to the axis of waveguide 3, and is positively sealed to the enclosure 5 between the annular edge portion of the disk plane and the annular shoulder presented by the annular angular cut 7, by means of glass-sealing, brazing, or other suitable means depending upon the nature of material. In axial contact with the enclosure 5, another metallic 3,281,729 Patented Oct. 25, 1966 enclosure 9 having therein a cylindrical space 10 of the same dimensions with the space 4, and belonging to another rectangular waveguide 8, is provided and fixed to the enclosure 5 in axial alignment. A hermetic waveguide window is thus formed in a simple manner.
With the above construction, the dielectric disk 6 can be sealed to the enclosure 5 in a positive manner along the annular edge portion of the disk plane having radial width of /2(D -D The sealing may also be efl ected along the peripheral face having width t, of the disk 6. There might occur disturbance of electromagnetic field by virtue of the existence of annular angular cut 7 of radial width /2(D -D but it has been found that such a disturbance can be adjusted by adoption of appropriate dimensional relations between the diameter D and thickness W of cylindrical spaces 4- and 10, and others, to obtain good transmission characteristics over a wide frequency band.
Thus, according to the present invention, if the specific permittivity of disc 6 is e, and the respective lateral widths of rectangular waveguides 3 and 8 are a, the dimensions are determined to have the following relations:
With such dimensional relations, it has been found that the electric field component of transmitted electromagnetic wave is mainly so distributed as to be perpendicular to the plane of the dielectric disk 6, and the voltage standing Wave ratio (VSWR) and the trans mission loss are sufficiently decreased over the whole region of frequency band employed in rectangular waveguides 3 and 8.
According to the present invention, the glass-sealing or brazing of dielectric disk 6 may be effected between the annular edge portion of the plane of disk 6 and the annular shoulder presented by the annular angular cut 7, which is perpendicular to the axis of Waveguide, and moreover, a length of sealing region may exist between gaseous areas at both sides of the portions to be sealed together, so that positive and superior hermetic sealing may be obtained.
The above-described hermetic window construction was tested in a frequency range from 8.2 to 12.4 gigacycles, and the results are shown in FIGS. 4 and 5. The hermetic window construction under experiments had the following dimensions:
11:22.9 millimeters, D =0.96a.
The dielectric disk 6 was made of borosilicate glass of 1.5 millimeters thickness with 6 5, which glass can be sealed with iron-nickel-cobalt alloy of the enclosure 5.
As seen from FIGS. 4 and 5, the voltage standing wave ratio is lower than 1.14, and the transmission loss is lower than 0.4 decibel. Such extremely superior characteristics can be obtained in any band of further higher frequency, as is readily understood from the law of similarity of electro-magn'etic wave.
The present invention is featured, as is obvious from the embodiment hereinabove described, by the facts that a dielectric disk of glass, ceramics, sapphire, quartz, or the like is hermetically sealed in an annular angular cut formed around the open end of a thin cylindrical space at the abutting faces of a pair of metallic enclosures, in a position perpendicular to the axis of rectangular waveguides, thus providing positive sealing area for the thin dielectric disk, and yet providing hermetic waveguide with little reflection and loss of radio wave, and that the manufacture of a miniature waveguide having hermetic window for millimeter wave electronic tube is facilitated. The new hermetic window construction is applicable to traveling wave tubes, as well as backward wave tubes, particularly of millimeter waves. In addition, it is to be understood that the present invention is also applicable to hermetic windows for gas scaling, in general.
What is claimed is:
1. A hermetic window construction for a wave guide for an extremely high frequency electronic tube comprising first and second rectangular wave guides having connecting portions on the ends thereof, said connecting portions being joined in abutting relationship to define a thin cylindrical space therein and therebetween, an annular angular out being formed in the abutting face of at least one said connecting portion, a dielectric disk being placed in said annular angular cut perpendicular to the axis of said rectangular wave guides, said disk being sealed to said annular angular cut along at least the annular edge portion of the plane of said dielectric disk, the thickness 1 and specific permittivity e of the window, the lateral width a of said rectangular wave guides, the diameter D and thickness W of said cylindrical space in the one part of said enclosure, and the diameter D of the annular angular out being selected in the following relations:
2. A hermetic window construction according to claim 1 in which said dielectric disk is additionally sealed to said enclosure along the peripheral face of said disk.
3. A hermetic window construction according to claim 1 in which said dielectric disk is made of a material selected from a group consisting of glass, ceramics, sapphire, and quartz, while said enclosure is made of a metal selected from the group consisting of an iron-nickelcobalt alloy, titanium, and copper. 4. The hermetic window construction according to claim 1, in which said dielectric disk is additionally sealed to said enclosure along the peripheral face of said disk.
5. The hermetic window construction according to claim 1, in which said dielectric disk is made of a material selected from a group consisting of glass, ceramics, sapphire, and quartz, while said enclosure is made of a metal selected from the group consisting of iron-nickelcobalt alloy, titanium and copper.
References Cited by the Examiner UNITED STATES PATENTS 2,483,768 10/1949 Hershberger 33398 2,958,834 11/1960 Symons 33398 3,100,881 8/1963 Edson 33398 3,101,461 8/1963 Henry-Bezy et a1. 33398 HERMAN KARL SAALBACH, Primary Examiner.
L. ALLAHUT, Assistant Examiner.

Claims (2)

  1. 0.15A<EXT<0.5A 0.7A<DO<1.0A 0.05A<W<0.25A,AND 0.1A<(D1-DO)<0.3A
  2. 1. A HERMETIC WINDOW CONSTRUCTION FOR A WAVE GUIDE FOR AN EXTREMELY HIGH FREQUENCY ELECTRONIC TUBE COMPRISING FIRST AND SECOND RECTANGULAR WAVE GUIDES HAVING CONNECTING PORTIONS ON THE ENDS THEREOF, SAID CONNECTING PORTIONS BEING JOINED IN ABUTTING RELATIONSHIP TO DEFINE A THIN CYLINDRICAL SPACE THEREIN AND THEREBETWEEN, AN ANNULAR ANGULAR CUT BEING FORMED IN THE ABUTTING FACE OF AT LEAST ONE SAID CONNECTING PORTION, A DIELECTRIC DISK BEING PLACED IN SAID ANNULAR ANGULAR CUT PERPENDICULAR TO THE AXIS OF SAID RECTANGULAR WAVE GUIDES, SAID DISK
US381107A 1963-07-12 1964-07-08 Hermetic window construction of waveguide for extremely high frequency electronic tubes Expired - Lifetime US3281729A (en)

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

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

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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

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US (2) US3281729A (en)
BE (2) BE650409A (en)
DE (1) DE1491373B2 (en)
GB (2) GB1066644A (en)
NL (2) NL6407743A (en)
SE (1) SE316240B (en)

Cited By (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
US5770990A (en) * 1995-11-15 1998-06-23 Krohne Messtechnik Gmbh & Co. Kg Microwave window
CN114420521A (en) * 2022-01-14 2022-04-29 深圳奥镨科技有限公司 Terahertz vacuum electronic device output window and manufacturing method thereof
CN115881496A (en) * 2023-01-03 2023-03-31 电子科技大学 High-frequency structure and expansion interaction klystron

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1564703A (en) * 1968-02-21 1969-04-25
US3711943A (en) * 1970-09-03 1973-01-23 Varian Associates Method for constructing an interaction circuit for a microwave tube
CN104362060B (en) * 2014-11-25 2016-10-19 中国人民解放军国防科学技术大学 A kind of Filled Dielectrics compact Relativistic backward-wave oscillator
CN105869970B (en) * 2016-04-18 2018-01-02 中国工程物理研究院应用电子学研究所 A kind of across waveband double-frequency Relativistic backward-wave oscillator

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* 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
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
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

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT454375A (en) * 1948-07-20
NL178359B (en) * 1952-05-17 Mita Industrial Co Ltd ELECTROSTATIC COPY DEVICE.
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

Patent Citations (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

Cited By (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
US5770990A (en) * 1995-11-15 1998-06-23 Krohne Messtechnik Gmbh & Co. Kg Microwave window
CN114420521A (en) * 2022-01-14 2022-04-29 深圳奥镨科技有限公司 Terahertz vacuum electronic device output window and manufacturing method thereof
CN115881496A (en) * 2023-01-03 2023-03-31 电子科技大学 High-frequency structure and expansion interaction klystron

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DE1491372A1 (en) 1969-10-02
DE1491372B2 (en) 1972-10-19
GB1066644A (en) 1967-04-26
SE316240B (en) 1969-10-20
BE650409A (en) 1964-11-03
DE1491373B2 (en) 1972-03-02
US3353057A (en) 1967-11-14
GB1067464A (en) 1967-05-03
BE650408A (en) 1964-11-03
NL6407743A (en) 1965-01-13
NL6407883A (en) 1965-01-13
DE1491373A1 (en) 1969-05-22

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