US3275957A - Microwave energy windows with conductive coating for dissipating static charges - Google Patents

Microwave energy windows with conductive coating for dissipating static charges Download PDF

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Publication number
US3275957A
US3275957A US303038A US30303863A US3275957A US 3275957 A US3275957 A US 3275957A US 303038 A US303038 A US 303038A US 30303863 A US30303863 A US 30303863A US 3275957 A US3275957 A US 3275957A
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US
United States
Prior art keywords
window
microwave energy
conductive coating
coating
static charges
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
US303038A
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English (en)
Inventor
Pickering Alan Hugh
Thompson Frederick Charles
Young Arthur James
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.)
Teledyne UK Ltd
Original Assignee
English Electric Valve Co 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 English Electric Valve Co Ltd filed Critical English Electric Valve Co Ltd
Application granted granted Critical
Publication of US3275957A publication Critical patent/US3275957A/en
Anticipated expiration legal-status Critical
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/08—Dielectric windows
    • 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

Definitions

  • This invention relates to mirowave energy windows for high power microwave waveguides and devices.
  • a microwave energy window of insulating material is provided on one or both of its surfaces with a thin resistive conductive coating shaped to form at least one conductor extending substantially perpendicularly to the direction of the high frequency electric field component in the plane of the window.
  • the deposit or coating on one or both sides of the window should be of spiral shape.
  • the deposit or coating on one or on both sides of the window should consist of a number of radial lines.
  • the invention is, of course, not limited to its application to windows for microwave energy in the circular TM and circular TE modes.
  • the deposit or coating would be in lines perpendicular to the plane of electric polarisation.
  • the deposit or deposits or coating or coatings provided are such that the high frequency power dissipation thereof is small and an adequate high frequency breakdown voltage strength retained for the window.
  • suitable materials for the coatings or deposits provided by this invention are colloidal graphite and metal which may be deposited by any known convenient suitable method, e.g., by painting or sputtering. In all cases the deposit or coating is arranged to form a conductor or conductors lying as nearly as possible perpendicular to the lines of the electric field in order to reduce, as much as possible, absorption of high frequency energ.
  • FIGURE 1 conventionally represents the electric field in the plane of a window of a circularly sectioned waveguide operating in the circular TM mode
  • FIGURE 2 is a face view of a window in accordance with the invention for such a guide
  • FIGURE 3 similarly represents the electric field in the plane of a Window of a circularly sectioned waveguide operating in the circular TE mode
  • FIGURE 4 is a face view of a window for use in this case
  • FIGURE 5 represents the electric field in the plane of a window of a circularly sectioned waveguide operating in the TE mode
  • FIGURE 6 is a face view of a window for the guide of FIGURE 5.
  • the arrow-headed broken lines represent the electric field in a circularly sectioned waveguide 1 operating in the circular TM mode.
  • the window is provided on either or both of its faces, as shown in FIGURE 2, with a thin spiral coating 2 of, for example, colloidal graphite or metal. A deposit on only one face of the window is shown in FIGURE 2.
  • FIGURE 3 the arrow-headed lines represent the electric field of a guide 1 operating in the circular TE mode.
  • a deposit or coating 3 of radial lines is employed as shown in FIGURE 4.
  • FIGURE 5 the arrow-headed broken lines represent the electric field of a guide 1 operating in the TE mode.
  • a deposit or coating 4 of lines perpendicular to the lines of the electric field is employed as shown in FIGURE 6. Again there may be coatings on either or both faces of the window, but FIGURE 6 shows a coating on only one face.
  • the coatings if provided on both faces of a window, will be identical, but this is not essential.
  • a microwave energy window of insulating material having on at least one of its surfaces 2.
  • thin resistive conductive coating shaped to form at least one conductor extending substantially perpendicularly to the direction of the high frequency electric field component in the plane of the window.
  • a window as claimed in claim 1 having a conductive coating on each of its surfaces.
  • a window in accordance with claim 1 for micro- Wave energy in the TE mode wherein said conductive coating is in the form of lines perpendicular to the plane of electric polarisation.
  • a window as claimed in claim 1 wherein the coating material is graphite.

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  • Microwave Tubes (AREA)
  • Waveguide Aerials (AREA)
US303038A 1962-10-01 1963-08-19 Microwave energy windows with conductive coating for dissipating static charges Expired - Lifetime US3275957A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB37029/62A GB996990A (en) 1962-10-01 1962-10-01 Improvements in or relating to microwave energy windows

Publications (1)

Publication Number Publication Date
US3275957A true US3275957A (en) 1966-09-27

Family

ID=10393162

Family Applications (1)

Application Number Title Priority Date Filing Date
US303038A Expired - Lifetime US3275957A (en) 1962-10-01 1963-08-19 Microwave energy windows with conductive coating for dissipating static charges

Country Status (5)

Country Link
US (1) US3275957A (enrdf_load_stackoverflow)
CH (1) CH415771A (enrdf_load_stackoverflow)
DE (1) DE1259981B (enrdf_load_stackoverflow)
GB (1) GB996990A (enrdf_load_stackoverflow)
NL (1) NL298479A (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4620170A (en) * 1984-12-19 1986-10-28 Varian Associates, Inc. Means for liquid cooling a microwave window
US5610567A (en) * 1994-04-25 1997-03-11 Southeastern Universities Research Assn., Inc. Superconducting radiofrequency window assembly
US6118358A (en) * 1999-01-18 2000-09-12 Crouch; David D. High average-power microwave window with high thermal conductivity dielectric strips

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5450047A (en) * 1993-09-21 1995-09-12 Varian Associates, Inc. High power waveguide window and waveguide assembly
US5568015A (en) * 1995-02-16 1996-10-22 Applied Science And Technology, Inc. Fluid-cooled dielectric window for a plasma system
US5936493A (en) * 1997-11-24 1999-08-10 Raytheon Company Low cost, one-shot switch waveguide window
RU2207655C1 (ru) * 2002-04-10 2003-06-27 Галкин Валентин Сергеевич Баночное окно ввода и/или вывода энергии свч

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2663812A (en) * 1950-03-04 1953-12-22 Philips Lab Inc X-ray tube window
US2990526A (en) * 1953-03-02 1961-06-27 Raytheon Co Dielectric windows
US3059142A (en) * 1959-12-10 1962-10-16 Gen Electric High power microwave device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1212051A (fr) * 1958-03-18 1960-03-22 Thomson Houston Comp Francaise Perfectionnements aux fenêtres étanches pour guide d'ondes
FR1295748A (fr) * 1961-07-20 1962-06-08 Thomson Houston Comp Francaise Fenêtre hyperfréquence de transmission

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2663812A (en) * 1950-03-04 1953-12-22 Philips Lab Inc X-ray tube window
US2990526A (en) * 1953-03-02 1961-06-27 Raytheon Co Dielectric windows
US3059142A (en) * 1959-12-10 1962-10-16 Gen Electric High power microwave device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4620170A (en) * 1984-12-19 1986-10-28 Varian Associates, Inc. Means for liquid cooling a microwave window
US5610567A (en) * 1994-04-25 1997-03-11 Southeastern Universities Research Assn., Inc. Superconducting radiofrequency window assembly
US6118358A (en) * 1999-01-18 2000-09-12 Crouch; David D. High average-power microwave window with high thermal conductivity dielectric strips

Also Published As

Publication number Publication date
DE1259981B (de) 1968-02-01
NL298479A (enrdf_load_stackoverflow)
GB996990A (en) 1965-06-30
CH415771A (fr) 1966-06-30

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