EP0299616A2 - Wellenleitervorrichtung - Google Patents

Wellenleitervorrichtung Download PDF

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Publication number
EP0299616A2
EP0299616A2 EP88305248A EP88305248A EP0299616A2 EP 0299616 A2 EP0299616 A2 EP 0299616A2 EP 88305248 A EP88305248 A EP 88305248A EP 88305248 A EP88305248 A EP 88305248A EP 0299616 A2 EP0299616 A2 EP 0299616A2
Authority
EP
European Patent Office
Prior art keywords
waveguide
insulating body
conductive
conductive material
waveguide arrangement
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.)
Withdrawn
Application number
EP88305248A
Other languages
English (en)
French (fr)
Other versions
EP0299616A3 (de
Inventor
Robert Brian Greed
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.)
General Electric Co PLC
Original Assignee
General Electric Co PLC
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 General Electric Co PLC filed Critical General Electric Co PLC
Publication of EP0299616A2 publication Critical patent/EP0299616A2/de
Publication of EP0299616A3 publication Critical patent/EP0299616A3/de
Withdrawn legal-status Critical Current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
    • H01P3/00—Waveguides; Transmission lines of the waveguide type
    • H01P3/12—Hollow waveguides
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P11/00—Apparatus or processes specially adapted for manufacturing waveguides or resonators, lines, or other devices of the waveguide type
    • H01P11/001—Manufacturing waveguides or transmission lines of the waveguide type
    • H01P11/002—Manufacturing hollow waveguides

Definitions

  • This invention relates to a waveguide arrangement and more particularly, but not exclusively, to a waveguide of the type formed from two parts, each having a channel and means for connecting the parts together so that the two channels co-operate to form a rectangular waveguide.
  • Figures 1A, 1B and 1C show a known waveguide in perspective view, a transverse section of the waveguide of Figure 1A and a sectional view along the line W-W of Figure 1B respectively.
  • Waveguides formed in this way are most efficient if the "split" between the two parts is mid-way along the broad dimension of the rectangular cross-section of the waveguide. This is because, at this position, the radio frequency current is zero or near zero and thus the split has little effect on the performance of the waveguide.
  • This technique is known generally as "E-plane technology” because the split is in the plane of the electric or E field of the dominant waveguide mode.
  • E-plane technology is employed in integrated systems comprising a number of components joined by waveguides, both waveguides and components being fabricated in a common conductive block.
  • conductors or components are often mounted on printed circuit boards (P.C.B's). This introduces a problem in that the P.C.B substrate provides a route for energy travelling along the waveguide to escape, which is obviously undesirable.
  • a P.C.B. substrate is supported in detents in the sides of the waveguide, the detents being so small compared to the wavelength of the radiation carried in the waveguide that they have negligible effect on its propogation.
  • Such a waveguide is shown in Figures 2A, 2B and 2C which show a waveguide of this known type in perspective view, a transverse cross section of the waveguide of Figure 2A and a sectional view on the line X-X of Figure 2B respectively.
  • This method has the disadvantage of complexity and expense because it requires the P.C.B.'s to be manufactured and placed with great accuracy. Also it is difficult to D.C. isolate the P.C.B's from the waveguide walls if this is required.
  • a P.C.B. substrate passes through the walls of the waveguide and a system of R.F. chokes is used to prevent the escape of radiation from the waveguide.
  • a waveguide is shown in Figures 3A, 3B and 3C which show a waveguide of that known type in perspective view, a transverse cross section of the waveguide of Figure 3A and a sectional view on the line Y-­Y of Figure 3B respectively.
  • the problem with this method is that the space required for the chokes greatly increases the size of the waveguide assembly and the chokes allow a significant amount of radiation to escape from the waveguide.
  • a waveguide arrangement comprising a waveguide and an insulating body arranged to partially occupy the waveguide, characterised by at least some of the surfaces of the insulating body bearing conductive material which is substantially coplanar with a surface of the waveguide.
  • the insulating body is substantially planar and the surfaces bearing conductive material are edges of the insulating body.
  • the surfaces bearing conductive material are provided by apertures through the insulating body.
  • a P.C.B. 10 separates the two conductive bodies 2 and 3.
  • the P.C.B. 10 has a number of slots 11 cut in it, which are plated through with a layer of conductive material 12.
  • the slots 11 are positioned so that when the P.C.B. 10 is in place, the layer of conductive material 12 is coplanar with a side wall of the waveguide 1 such that the two conductive bodies 2 and 3 and the conductive layer 12 form a single conductive surface.
  • the conductive layer 12 acts as a part of the waveguide wall and prevents the escape of the radiation propagated along the wavegude.
  • the portions of the PCB 13 between the slots should be made as small as possible, in order to prevent the escape of radiation through them, however the gaps must also be large enough to give the P.C.B. 10 the necessary physical strength. It has been found that a slot separation in the approximate range ⁇ /10 to ⁇ /20 gives good results.
  • the length 14 and width 15 of the slots 11 must be such that they do not form resonant cavities and radiate the radiation propagating along the waveguide 1 to the outside, the length 14 of the slots being near to an odd number of ⁇ /4 and the width 15 being in the approximate range ⁇ /10 to ⁇ /20 has been found, to prevent resonance.
  • a conductive pattern 16 is laid down in the surface of the P.C.B. 10 to carry power to a diode 17 mounted on the P.C.B. 10 in the waveguide 1.
  • An insulating layer 18 is then laid down on the conductive surface of the P.C.B. 10 so that when the waveguide is assembled the insulating layer separates the conductive surface of the P.C.B. 10 from the conductive bodies 2 and 3.
  • This insulating layer 18 insulates the conductive pattern 16 and the conductive layers 12 from the conductive bodies 2 and 3 and so allows D.C. isolation.
  • FIG. 8 Another way in which the invention could be used is shown in Figure 8.
  • a P.C.B. 19 is supported by detents 20 in conductive bodies 2 and 3.
  • Conductive layers 21 on the edges of the P.C.B. 19 are arranged to form a part of the waveguide walls together with the conductive bodies 2 and 3.
  • the conductive layers 21 cannot, of course, be coplanar with the conductive bodies 2 and 3 because there must be enough overlap to support the P.C.B. 10, but if the overlap is small enough the overlap will not affect the radiation propagating in the waveguide 1. Since the detents 20 cut into the conductive bodies 2 and 3 do not define the walls of the waveguide 1 they need not be formed with precision.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Waveguides (AREA)
  • Waveguide Aerials (AREA)
EP88305248A 1987-07-14 1988-06-09 Wellenleitervorrichtung Withdrawn EP0299616A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8716508 1987-07-14
GB08716508A GB2207009A (en) 1987-07-14 1987-07-14 Waveguide construction

Publications (2)

Publication Number Publication Date
EP0299616A2 true EP0299616A2 (de) 1989-01-18
EP0299616A3 EP0299616A3 (de) 1990-03-28

Family

ID=10620597

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88305248A Withdrawn EP0299616A3 (de) 1987-07-14 1988-06-09 Wellenleitervorrichtung

Country Status (2)

Country Link
EP (1) EP0299616A3 (de)
GB (1) GB2207009A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015226159A (ja) * 2014-05-27 2015-12-14 三菱電機株式会社 導波管スロットアンテナ、送受信器、導波管スロットアンテナの製造方法及び送受信器の製造方法
CN109103556A (zh) * 2018-08-30 2018-12-28 深圳大学 波导滤波器及其制造方法
EP3721501B1 (de) * 2017-12-05 2023-11-01 Université de Bordeaux Mikrowellen-bauelement und zugehöriges herstellungsverfahren

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2222489B (en) * 1988-08-31 1992-08-12 Marconi Electronic Devices Waveguide apparatus

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2932806A (en) * 1958-12-02 1960-04-12 Bomac Lab Inc Broadband microwave window
GB875245A (en) * 1958-06-04 1961-08-16 Thomson Houston Comp Francaise Waveguide window
US4052683A (en) * 1974-02-28 1977-10-04 U.S. Philips Corporation Microwave device
GB2129224A (en) * 1982-08-27 1984-05-10 Philips Electronic Associated R. F. Circuit

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3646485A (en) * 1969-06-23 1972-02-29 Siemens Ag Traveling-wave tube with a vacuumtight ceramic window
BE772078A (fr) * 1971-03-19 1972-01-17 Thomson Csf Coupleurs en hyperfrequence a paroi metallique mince
GB1560533A (en) * 1977-05-18 1980-02-06 Marconi Co Ltd Waveguide expansion joint
US4286240A (en) * 1979-12-03 1981-08-25 Varian Associates, Inc. Circular electric mode microwave window
DE3028461A1 (de) * 1980-07-26 1982-04-08 Philips Patentverwaltung Gmbh, 2000 Hamburg Hochbelastbares hf-fenster, insbesondere fuer grossklystrons
JPS5877302A (ja) * 1981-10-19 1983-05-10 バリアン・アソシエイツ・インコ−ポレイテツド 広帯域でモ−ド可変な導波管窓

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB875245A (en) * 1958-06-04 1961-08-16 Thomson Houston Comp Francaise Waveguide window
US2932806A (en) * 1958-12-02 1960-04-12 Bomac Lab Inc Broadband microwave window
US4052683A (en) * 1974-02-28 1977-10-04 U.S. Philips Corporation Microwave device
GB2129224A (en) * 1982-08-27 1984-05-10 Philips Electronic Associated R. F. Circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015226159A (ja) * 2014-05-27 2015-12-14 三菱電機株式会社 導波管スロットアンテナ、送受信器、導波管スロットアンテナの製造方法及び送受信器の製造方法
EP3721501B1 (de) * 2017-12-05 2023-11-01 Université de Bordeaux Mikrowellen-bauelement und zugehöriges herstellungsverfahren
CN109103556A (zh) * 2018-08-30 2018-12-28 深圳大学 波导滤波器及其制造方法

Also Published As

Publication number Publication date
GB2207009A (en) 1989-01-18
EP0299616A3 (de) 1990-03-28
GB8716508D0 (en) 1987-08-19

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