US3483489A - End launch stripline-waveguide transducer - Google Patents

End launch stripline-waveguide transducer Download PDF

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Publication number
US3483489A
US3483489A US701913A US3483489DA US3483489A US 3483489 A US3483489 A US 3483489A US 701913 A US701913 A US 701913A US 3483489D A US3483489D A US 3483489DA US 3483489 A US3483489 A US 3483489A
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United States
Prior art keywords
waveguide
stripline
conductor
wall
plane
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
US701913A
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English (en)
Inventor
Norman R Dietrich
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.)
AT&T Corp
Original Assignee
Bell Telephone Laboratories Inc
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Filing date
Publication date
Application filed by Bell Telephone Laboratories Inc filed Critical Bell Telephone Laboratories Inc
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P5/00—Coupling devices of the waveguide type
    • H01P5/08—Coupling devices of the waveguide type for linking dissimilar lines or devices
    • H01P5/10—Coupling devices of the waveguide type for linking dissimilar lines or devices for coupling balanced lines or devices with unbalanced lines or devices
    • H01P5/107—Hollow-waveguide/strip-line transitions

Definitions

  • a stripline is connected end-to-end with a hollow waveguide.
  • the stripline center conductor is inserted into the waveguide and is shorted to the waveguide wall by a screw mechanism.
  • One of the stripline ground planes terminates at the waveguide end wall, and the other is inserted into the waveguide for a selected distance. Coupling is achieved without undesirable radiation and a good impedance match is provided.
  • This invention relates to radio frequency transducers and more particularly to a transducer for end launch coupling between a waveguide of the rectangular hollow conductor type and one of the parallel strip, multiple conductor type such as the stripline.
  • Structural interconnection is relatively simple to achieve, but electrical coupling presents difiiculties.
  • transition must be provided between the principal stripline TEM mode and the dominant TE mode in the rectangular waveguide.
  • Such a transition may be accomplished either by means of a probe inserted through the broad wall of the waveguide parallel to the electric field of the guide or by means of a loop, the plane of which is normal to the magnetic field, shorted to a wall of the guide.
  • the former method utilizes electric field coupling and is referred to as a top launch transition.
  • the latter method is referred to as an end launch transition and employs magnetic field coupling.
  • a top launch transition necessitates the perpendicular orientation of the TEM and TE transmission lines and is hence not as convenient for use with microwave integrated circuitry as is the end-to-end coupling.
  • a portion of the stripline is inserted longitudinally into a hollow waveguide in an end-to-end relationship.
  • Structural elements of both the stripline and the waveguide are coextensive in a transition region and within this region the field patterns of the stripline TEM mode and the Waveguide TE mode are coextensively supported.
  • the TEM field pattern is supported in the transition region by the center conductor and one of the two stripline ground planes which extend through an opening in an end wall of the guide into the transition region.
  • the extended ground plane is an indented surface in a first broad wall of the waveguide.
  • the TE field pattern is supported by the waveguide channel which is identical to the channel outside the region except for the aforementioned indentation.
  • Coupling takes place in the transition region where the field patterns of both transmission media are coextensive.
  • the stripline conductor is shorted to a second broad wall of the waveguide by means of a screw mechanism in a manner which creates interaction of the field patterns of both modes. An impedance match is therefore made possible since the field patterns are coextensive within the transition region.
  • FIG. 1 is a cut-away perspective view of an end launch waveguide-stripline transducer in accordance with the present invention
  • FIG. 2 is a cut-away top view of an end launch waveguide-stripline transducer in accordance with the present invention.
  • FIG. 3 is a cross-sectional view taken through FIG. 2, as indicated, to show in elevation the transition region in accordance with the present invention.
  • the channel of waveguide 10 is defined by upper wall 19 and parallel lower wall 20, parallel narrow side walls 35 and 36 and end wall 21 cut in body 15.
  • Waveguide 10 is connected to additional waveguide lengths, not shown, by any of a variety of means.
  • an additional length may be fixed to waveguide 10 by means of bolts passing through holes 32 in flange 31 and through corresponding holes in a corresponding flange of the length not shown.
  • Stripline 11 is shown truncated along lines 14 and 14 and having thin center strip conductor 12 disposed between a pair of ground planes 16 and 17.
  • Strip conductor 12 is a fixed distance a from ground plane 16 and a fixed distance b from ground plane 17.
  • Strip conductor 12 is typically supported by being formed of a conductive material plated or printed upon a supporting substrate 18 of high dielectric material. It should be understood, however, that the invention may be applied to striplines having self-supporting center conductors or to lines in which ground planes are bounded or plated surfaces in the familiar sandwich construction.
  • both stripline 11 and waveguide are coextensive within a transition region.
  • a portion of stripline 11 is inserted into waveguide 10 through an opening in end wall 21.
  • center strip conductor 12 and its supporting substrate 18 extend into waveguide 18 a distance d beyond end wall 21.
  • Conducting ground plane 17, which in the embodiment shown has a width v substantially less than the width g of waveguide 10, extends into waveguide 10 a distance 2 beyond end wall 21.
  • Ground plane 16 terminates at end wall 21.
  • conductor strip 12 is shorted to upper wall 19 of waveguide 10 by means of a conducting contact pin 22 riding in a cylindrical channel in screw 23 under pressure of spring 24.
  • the pressure applied by pin 22 to strip conductor 12 is adjustable by advancing and retracting screw 23 by means of suitable threading on the exterior of screw 23 and corresponding threading in body passing through wall 19.
  • the spring constant of spring 24 and adjustment of screw 23 are chosen to maintain electrical contact between the waveguide wall and conductor 12 without breaking strip conductor 12 or substrate 18.
  • the short thus formed by pin 22 couples TEM mode currents into a magnetic field surrounding the shorting mechanism which is in the plane of the magnetic field of the TE mode of waveguide 10.
  • the waveguide channel In order to make the field patterns of the TEM and TEM modes coextensive in a transition region and afford a smooth transfer of energy between the modes, the waveguide channel must extend throughout the transition region to support the TE mode, and ground plane 17 and stripline conductor 12 must be arranged to provide TEM propagation throughout the region. Plane 17 and conductor 12 must extend beyond the point of the short in order to avoid undesirable effects upon the TEM mode field in the range of the short.
  • Ground plane 16 is terminated at end wall 21 to prevent a short circuit between conductor 12 and plane 16 which would affect the TEM mode field.
  • Wall 19 extends beyond the shorting screw in order to avoid undesirable effects upon the TE mode field in the range of the short.
  • the resultant offset of centerlines is s:.038 inch.
  • An electromagnetic wave transducer comprising a hollow conductively bounded rectangular waveguide, a parallel conductor line having a strip center conductor disposed in parallel spaced relationship to at least one conductive ground plane, a portion of said waveguide being coextensive with a portion of said one conductive ground plane and with a portion of said strip center conductor in a transition region, the broad walls of said waveguide in said region being parallel to and offset from said one ground plane such that said broad walls lie in planes different from the plane determined by said one ground plane, and means for shorting said strip conductor to a first of said broad walls within said region.
  • a transducer as claimed in claim 1 further comprising means for capacitively coupling said strip center conductor to said one ground plane within said region.

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  • Waveguides (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Waveguide Connection Structure (AREA)
US701913A 1968-01-31 1968-01-31 End launch stripline-waveguide transducer Expired - Lifetime US3483489A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US70191368A 1968-01-31 1968-01-31

Publications (1)

Publication Number Publication Date
US3483489A true US3483489A (en) 1969-12-09

Family

ID=24819169

Family Applications (1)

Application Number Title Priority Date Filing Date
US701913A Expired - Lifetime US3483489A (en) 1968-01-31 1968-01-31 End launch stripline-waveguide transducer

Country Status (7)

Country Link
US (1) US3483489A (nl)
BE (1) BE727538A (nl)
DE (1) DE1903869C3 (nl)
FR (1) FR1600026A (nl)
GB (1) GB1247235A (nl)
NL (1) NL163906C (nl)
SE (1) SE335561B (nl)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3579149A (en) * 1969-12-08 1971-05-18 Westinghouse Electric Corp Waveguide to stripline transition means
US3651432A (en) * 1970-04-14 1972-03-21 Amp Inc Impedance matched printed circuit connectors
US3932823A (en) * 1975-04-23 1976-01-13 The United States Of America As Represented By The Secretary Of The Navy Microstrip to waveguide adapter
US4052683A (en) * 1974-02-28 1977-10-04 U.S. Philips Corporation Microwave device
US4754239A (en) * 1986-12-19 1988-06-28 The United States Of America As Represented By The Secretary Of The Air Force Waveguide to stripline transition assembly
US4816791A (en) * 1987-11-27 1989-03-28 General Electric Company Stripline to stripline coaxial transition
FR2675637A1 (fr) * 1991-04-16 1992-10-23 Bretagne Critt Transition ligne microruban/guide d'ondes.
EP0595346A1 (en) * 1992-10-29 1994-05-04 Nec Corporation Composite microwave module assembly and its connection structure
US5559480A (en) * 1983-08-22 1996-09-24 The United States Of America As Represented By The Secretary Of The Navy Stripline-to-waveguide transition
WO2024023903A1 (ja) * 2022-07-26 2024-02-01 三菱電機株式会社 マイクロストリップ線路－導波管変換器
JP7555523B2 (ja) 2022-07-26 2024-09-24 三菱電機株式会社 マイクロストリップ線路－導波管変換器

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3127693C2 (de) * 1981-07-14 1985-08-08 ANT Nachrichtentechnik GmbH, 7150 Backnang Übergang von einem Hohlleiter auf eine Mikrostreifenleitung
JP2001230606A (ja) * 2000-02-15 2001-08-24 Matsushita Electric Ind Co Ltd マイクロストリップ線路と、これを用いたマイクロ波装置
CN117250413B (zh) * 2023-11-20 2024-02-20 南京奥联智驾科技有限公司 一种天线的测试装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2501335A (en) * 1947-12-27 1950-03-21 Westinghouse Electric Corp Coaxial line to wave guide matching section
US3023382A (en) * 1960-07-15 1962-02-27 Microwave Dev Lab Inc Inline waveguide to coaxial transition
US3146410A (en) * 1961-01-05 1964-08-25 Sanders Associates Inc Strip line to ridged waveguide transition having a probe projecting into waveguide through ridge
US3265995A (en) * 1964-03-18 1966-08-09 Bell Telephone Labor Inc Transmission line to waveguide junction
US3293573A (en) * 1964-03-25 1966-12-20 Telefunken Patent Coaxial to elliptical waveguide coupling

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2979676A (en) * 1957-10-30 1961-04-11 Research Corp Waveguide to microstrip transition structure

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2501335A (en) * 1947-12-27 1950-03-21 Westinghouse Electric Corp Coaxial line to wave guide matching section
US3023382A (en) * 1960-07-15 1962-02-27 Microwave Dev Lab Inc Inline waveguide to coaxial transition
US3146410A (en) * 1961-01-05 1964-08-25 Sanders Associates Inc Strip line to ridged waveguide transition having a probe projecting into waveguide through ridge
US3265995A (en) * 1964-03-18 1966-08-09 Bell Telephone Labor Inc Transmission line to waveguide junction
US3293573A (en) * 1964-03-25 1966-12-20 Telefunken Patent Coaxial to elliptical waveguide coupling

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3579149A (en) * 1969-12-08 1971-05-18 Westinghouse Electric Corp Waveguide to stripline transition means
US3651432A (en) * 1970-04-14 1972-03-21 Amp Inc Impedance matched printed circuit connectors
US4052683A (en) * 1974-02-28 1977-10-04 U.S. Philips Corporation Microwave device
US3932823A (en) * 1975-04-23 1976-01-13 The United States Of America As Represented By The Secretary Of The Navy Microstrip to waveguide adapter
US5559480A (en) * 1983-08-22 1996-09-24 The United States Of America As Represented By The Secretary Of The Navy Stripline-to-waveguide transition
US4754239A (en) * 1986-12-19 1988-06-28 The United States Of America As Represented By The Secretary Of The Air Force Waveguide to stripline transition assembly
US4816791A (en) * 1987-11-27 1989-03-28 General Electric Company Stripline to stripline coaxial transition
FR2675637A1 (fr) * 1991-04-16 1992-10-23 Bretagne Critt Transition ligne microruban/guide d'ondes.
WO1992019020A1 (fr) * 1991-04-16 1992-10-29 Centre Regional D'innovation Et De Transfert De Technologie En Electronique Et Communication (Critt) Transition ligne microruban/guide d'ondes
EP0595346A1 (en) * 1992-10-29 1994-05-04 Nec Corporation Composite microwave module assembly and its connection structure
US5450046A (en) * 1992-10-29 1995-09-12 Nec Corporation Composite microwave circuit module assembly and its connection structure
WO2024023903A1 (ja) * 2022-07-26 2024-02-01 三菱電機株式会社 マイクロストリップ線路－導波管変換器
JP7555523B2 (ja) 2022-07-26 2024-09-24 三菱電機株式会社 マイクロストリップ線路－導波管変換器

Also Published As

Publication number Publication date
NL163906C (nl) 1980-10-15
DE1903869B2 (de) 1971-02-04
DE1903869C3 (de) 1981-04-16
SE335561B (nl) 1971-06-01
GB1247235A (en) 1971-09-22
NL163906B (nl) 1980-05-16
NL6901302A (nl) 1969-08-04
DE1903869A1 (de) 1969-08-14
BE727538A (nl) 1969-07-01
FR1600026A (nl) 1970-07-20

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