US3267398A - Method of manufacturing wave-guides of the kind having a vacuum-tightly clamped-in mica window and waveguides manufactured by said methods - Google Patents

Method of manufacturing wave-guides of the kind having a vacuum-tightly clamped-in mica window and waveguides manufactured by said methods Download PDF

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Publication number
US3267398A
US3267398A US430403A US43040365A US3267398A US 3267398 A US3267398 A US 3267398A US 430403 A US430403 A US 430403A US 43040365 A US43040365 A US 43040365A US 3267398 A US3267398 A US 3267398A
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US
United States
Prior art keywords
waveguide
vacuum
portions
insulating plate
window
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
US430403A
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English (en)
Inventor
Bernardus Bastiaan Van Iperen
Kuypers Wilhelmus
Verhagen Martinus Cornelis
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.)
US Philips Corp
North American Philips Co Inc
Original Assignee
US Philips 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 US Philips Corp filed Critical US Philips Corp
Application granted granted Critical
Publication of US3267398A publication Critical patent/US3267398A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S228/00—Metal fusion bonding
    • Y10S228/903—Metal to nonmetal

Definitions

  • the invention relates to a method of manufacturing a waveguide, particularly to a method of providing a vacuum-tight connection of an insulating window in such a waveguide, particularly for use at wavelengths of less than 3 mms.
  • Such a waveguide is partly associated with the vacuum space of an electron tube connected thereto.
  • the waveguide must then have an insulating window which provides a vacuum-tight closure but constitutes a minimum obstacle for the high-frequency currents.
  • the waveguide With wavelengths above 5 mms. satisfactory results are obtained by the known constructions in which the waveguide is provided with a groove in which an insulating plate is sealed in a vacuum-tight manner by means of glass or solder.
  • the groove constitutes an irregularity in the waveguide, which involves gradually greater disadvantages for wavelengths further below 5 mms.
  • There are known structures in which the two portions of the waveguide on either side of the insulating window are prolonged up to the surface of the window, the groove being thus bridged. However, these structures require very accurate machining of the portions of the waveguide, whilst the thickness of the insulating window must have small tolerances.
  • -It is furthermore known to clamp a mica plate between two ends of tubular portions of a waveguide, in which case one of these tubular portions may be of a plastic metal, the portions being fastened in a cylindrical envelope so that upon heating the ends of the portions are very heavily urged against the mica window owing to the expansion of said portions. Then the plastic metal establishes a vacuum-tight junction with the mica surface.
  • the cylindrical envelope then serves for mechanical rigidity. Also this requires accurate machining and small tolerances, whilst the construction is complicated.
  • the flanges are put one on the other, so that the smooth surfaces of the flanges 2 and 4 are spaced apart by a distance equal to the thickness of the plate 5.
  • such a pressure is exerted on the flanges 2 and 4, whilst the flanges are heated at about 475 C. to 500 C. for about one hour, that the copper of the flanges flows around the mica plate 5, the flanges thus coming into contact with each other, and the mica plate being embedded in the material of the flanges. It is found that subsequent to the heating process the material of the flanges forms a vacuum-tight seal at the junction 6 by diffusion, so that even after etching a transitional area can hardly be shown. It is furthermore found that the material of the portions 1 and 3 is sealed in a vacuumtight manner to the mica surface.
  • the mica window has a thickness of for example i to 15 and it may have a diameter of for example 2 mm.
  • Such Waveguides may also be manufactured very efiicaceously for wavelengths of less than 1 mm.
  • the section may be circular, square or of any other shape.
  • the dimensions of the mica window may have large tolerances, since the plate need not fit in correspondingly shaped grooves.
  • a method of manufacturing a waveguide in which an insulating window is vacuum-tightly clamped in between two portions of the waveguide characterized in that the ends of the portions of the waveguide consisting at least partly of a plastic metal, are machined by a milling operation so as to be optically smooth and are arranged one on the other with the interposition of an insulating plate so that the insulating plate overlaps the aperture of the wave guide on all sides, whilst the outer edge of the insulating plate is located at a given distance inside the outer periphery of the ends of the waveguide portions, after which the waveguide ends are pressed together with such a high pressure that the insulating plate is embedded in their material whilst the waveguide portions are vacuum-tightly connected together and to the surface of the insulating plate by diffusion.
  • a waveguide particularly for wavelengths of less than 2 mms. manufactured by the method claimed in claim 1, characterized in that the insulating window in embedded in the material of the waveguide portions which are interconnected beyond the Window by diffusion.
  • a waveguide as claimed in claim 2 characterized in that the window is made of mica having a thickness of 15 1. or less and the waveguide is made of copper.
  • HERMAN KARL SAALBACH Primary Examiner. L. ALLAHUT, Assistant Examiner.

Landscapes

  • Optical Integrated Circuits (AREA)
  • Waveguide Connection Structure (AREA)
  • Packaging Of Annular Or Rod-Shaped Articles, Wearing Apparel, Cassettes, Or The Like (AREA)
US430403A 1964-02-12 1965-02-04 Method of manufacturing wave-guides of the kind having a vacuum-tightly clamped-in mica window and waveguides manufactured by said methods Expired - Lifetime US3267398A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6401186A NL6401186A (fr) 1964-02-12 1964-02-12

Publications (1)

Publication Number Publication Date
US3267398A true US3267398A (en) 1966-08-16

Family

ID=19789259

Family Applications (1)

Application Number Title Priority Date Filing Date
US430403A Expired - Lifetime US3267398A (en) 1964-02-12 1965-02-04 Method of manufacturing wave-guides of the kind having a vacuum-tightly clamped-in mica window and waveguides manufactured by said methods

Country Status (11)

Country Link
US (1) US3267398A (fr)
AT (1) AT249117B (fr)
BE (1) BE659702A (fr)
CH (1) CH427933A (fr)
DE (1) DE1237653B (fr)
DK (1) DK112259B (fr)
ES (1) ES309184A1 (fr)
FR (1) FR1424255A (fr)
GB (1) GB1027470A (fr)
NL (1) NL6401186A (fr)
NO (1) NO115479B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3439940A (en) * 1965-06-21 1969-04-22 Ritter Pfaudler Corp Connection with a glass coated sealing surface
US4660868A (en) * 1984-05-07 1987-04-28 Toyoko Kagaku Co., Ltd. Fluid coupling having high sealability
US4740018A (en) * 1982-12-28 1988-04-26 Kohtaki & Co., Ltd. Manifold and manufacturing method therefor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3439940A (en) * 1965-06-21 1969-04-22 Ritter Pfaudler Corp Connection with a glass coated sealing surface
US4740018A (en) * 1982-12-28 1988-04-26 Kohtaki & Co., Ltd. Manifold and manufacturing method therefor
US4660868A (en) * 1984-05-07 1987-04-28 Toyoko Kagaku Co., Ltd. Fluid coupling having high sealability

Also Published As

Publication number Publication date
DE1237653B (de) 1967-03-30
ES309184A1 (es) 1965-08-16
NO115479B (fr) 1968-10-14
CH427933A (de) 1967-01-15
AT249117B (de) 1966-09-12
NL6401186A (fr) 1965-08-13
BE659702A (fr) 1965-08-12
GB1027470A (en) 1966-04-27
DK112259B (da) 1968-11-25
FR1424255A (fr) 1966-01-07

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