US3579149A - Waveguide to stripline transition means - Google Patents

Waveguide to stripline transition means Download PDF

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Publication number
US3579149A
US3579149A US883014A US3579149DA US3579149A US 3579149 A US3579149 A US 3579149A US 883014 A US883014 A US 883014A US 3579149D A US3579149D A US 3579149DA US 3579149 A US3579149 A US 3579149A
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wall
output ports
stripline
transmission line
waveguide
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US883014A
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Kurt G Ramsey
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CBS Corp
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Westinghouse Electric Corp
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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 with unbalanced lines or devices
    • H01P5/107—Hollow-waveguide/strip-line transitions

Definitions

  • stripline wave energy transmission lines have become increasingly important in cases where low power wave energy is to be transmitted at a savings in weight and volume over a conventional waveguide system.
  • the stripline similar in operation to a coaxial transmission line, comprises a center conductor sandwiched betweendielectric slabs covered with conducting material forming a ground plane.
  • the present invention seeks to provide a new and improved system for connecting a waveguide to a stripline transmission line.
  • an object of the invention is to provide a waveguide to stripline transition for converting wave energy in the TE mode to the TEM mode or vice versa, wherein the coupling element between the two comprises a folded tee connection.
  • a apparatus for coupling electromagnetic wave energy from a rectangular waveguide to a stripline transmission line or vice versa comprising a folded tee junction having an input port connected to a waveguide conveying wave energy in the TE mode and a pair of parallel superimposed output ports disposed at right angles to the input port and separated by a wall between the pair.
  • the waves in the respective output ports are l80 out of phase with respect to each other.
  • a stripline wave energy transmission line is coupled to-the parallel output ports and includes an inner conductor sandwiched between dielectric slabs and hav ing outer layers of electrical conducting material on either side of the inner conductor.
  • the complete transition from waveguide to stripline is effected.
  • a matched load is disposed on the side of the input port of the folded tee opposite the parallel output ports.
  • FIG. I is a perspective view of the transition means of the invention.
  • FIG. 2 is a broken-away perspective view of the transition I means of FIG. 1 taken substantially along line II-II of FIG. I.
  • the embodiment of the invention shown includes an input port 10 adapted for connection to a rectangular waveguide conveying wave energy in the TE mode, meaning that all of the electric vectors are perpendicular to the'long transverse dimension of the waveguide and that a half wave pattern of the electric field exists along the short dimension of the guide through the center of the cross section.
  • the port 10 comprises part of a folded tee junction 12 having an input opening 14 communicating with the port I and a pair of output ports 16 and I8 separated by a posite the output ports 16 and I8 is a common wall 20 which, like the side walls of the coupler 12, is grounded.
  • Disposed on the side of the input opening 14 opshort waveguide section 22 which carries a matched terminating load impedance 24.
  • the wave energy patterns, as they appear in the two openings 16 and 18, are 180 out of phase with respect to each other.
  • the transmission line 28 comprises a center conductor 30 WhIClI IS connected to the wall 20 separating the two output ports 16 and 18.
  • the center conductor 30 is sandwiched between dielectric slabs 32 and 24 which may, for example, be formed from Teflon (trademark) or the like.
  • the center conductor 30 is provided with a relatively wide tongue 30A which tapers down to a much narrower section 308.
  • the Teflon slabs 32 and 34 are encases by means of a metallic casing 36 which may comprise a cladding or be formed by vapor deposition techniques.
  • the wave energy patterns on either side of the wall 20, being 180 out of phase with respect to each other, will be coupled to the center conductor 30 where the wave energy now travels along the stripline conductor in the TEM mode, in much the same manner as wave energy traveling along a coaxial line.
  • wave energy in the TEM mode fed into the folded tee 12 will appear at port 10 in the TE mode.
  • the present invention thus provides a new and improved means for coupling a rectangular waveguide to a stripline transmission line or vice versa.
  • Apparatus for coupling electromagnetic energy from a rectangular. waveguide to a stripline transmission line comprising a folded tee junction having an input port connected to a waveguide, a pair of parallel superimposed output ports disposed at right angles to said input port and separated by a wall between the two, the wave energy in the respective output ports being out of phase with respect to each other, a stripline transmission line comprising an inner conductor sandwiched between the dielectric slabs and having an outer layer of electrical conducting material on either side of said inner conductor, means connecting said outer layers of said stripline transmission line to the wall of said tee junction, said inner conductor of the stripline transmission line lying in essentially the same plane as the wall between said parallel output ports, and a load impedance disposed on the side of said input port of the folded tee junction opposite said parallel output ports.

Abstract

Described is apparatus for translating electromagnetic wave energy traveling in the TE10 mode in a rectangular waveguide to the TEM mode in a stripline transmission line or vice versa. This is accomplished by means of an E-plane folded tee connection having an input port connected to a waveguide and a stripline transmission line connected to a double output port of the folded tee.

Description

- United States Patent 1 3,579,149
[72] Inventor Kurt G. Ramsey [56] References Cited [21 l A I No gg 'z'la UNITED STATES PATENTS [22] f f 1969 3.462713 8/1969 Knerr 333/21 [45] Patented May l8, 3,483.489 12/1969 Dietrich 333/21 [73] Assignee Westinghouse Electric Corporation Primary Emminer-Herman Karl Saalbach Pittsburgh, Pa. Assistant E.mminer-Marvin Nussbaum Attorneys-F. l-l. Henson and E. P. Klipfel [54] WAVEGUIDE TO STRIPLINE TRANSITION MEANS 5 Chums 2 Drawmg Flgs ABSTRACT: Described is apparatus for translating elec- [52] US. Cl 333/11, tromagnetic wave energy traveling in the TB mode in a 333/21, 333/84 rectangular waveguide to the TEM mode in a stripline trans- [5 l Int. Cl .4 H01p 5/12, mission line or vice versa. This is accomplished by means of an HOlp 1/16 E-plane folded tee connection having an input port connected [50] Field of Search 333/21, 1 l, to a waveguide and a stripline transmission line connected to a 84 double output port of the folded tee.
All. 2 4 'III. IIIIIIIIII...
BACKGROUND OF THE INVENTION As is known, stripline wave energy transmission lines have become increasingly important in cases where low power wave energy is to be transmitted at a savings in weight and volume over a conventional waveguide system. The stripline, similar in operation to a coaxial transmission line, comprises a center conductor sandwiched betweendielectric slabs covered with conducting material forming a ground plane. In certain cases, it becomes necessary to couple a waveguide to a stripline transmission line or vice versa. This may be accomplished by means of a probe connected to the center conduc' tor of the stripline transmission line and extending into the waveguide. In certain cases, however, this arrangement is not altogether satisfactory.
SUMMARY OF THE INVENTION As an overall object, the present invention seeks to provide a new and improved system for connecting a waveguide to a stripline transmission line.
More specifically, an object of the invention is to provide a waveguide to stripline transition for converting wave energy in the TE mode to the TEM mode or vice versa, wherein the coupling element between the two comprises a folded tee connection.
In accordance with the invention, a apparatus for coupling electromagnetic wave energy from a rectangular waveguide to a stripline transmission line or vice versa is provided comprising a folded tee junction having an input port connected to a waveguide conveying wave energy in the TE mode and a pair of parallel superimposed output ports disposed at right angles to the input port and separated by a wall between the pair. The waves in the respective output ports are l80 out of phase with respect to each other. A stripline wave energy transmission line is coupled to-the parallel output ports and includes an inner conductor sandwiched between dielectric slabs and hav ing outer layers of electrical conducting material on either side of the inner conductor. By connecting the outer conductive material of the stripline transmission line to the wall of the folded tee junction, and by connecting the inner conductor of the stripline transmission line to the common wall between the parallel waveguide output ports, the complete transition from waveguide to stripline is effected. Preferably a matched load is disposed on the side of the input port of the folded tee opposite the parallel output ports.
The above and other objects and features of the invention will become apparent from the following detailed description taken in connection with the accompanying drawings which form a part of this specification, and in which:
FIG. I is a perspective view of the transition means of the invention; and
FIG. 2 is a broken-away perspective view of the transition I means of FIG. 1 taken substantially along line II-II of FIG. I.
With reference now to the drawings, the embodiment of the invention shown includes an input port 10 adapted for connection to a rectangular waveguide conveying wave energy in the TE mode, meaning that all of the electric vectors are perpendicular to the'long transverse dimension of the waveguide and that a half wave pattern of the electric field exists along the short dimension of the guide through the center of the cross section. The port 10 comprises part of a folded tee junction 12 having an input opening 14 communicating with the port I and a pair of output ports 16 and I8 separated by a posite the output ports 16 and I8 is a common wall 20 which, like the side walls of the coupler 12, is grounded. Disposed on the side of the input opening 14 opshort waveguide section 22 which carries a matched terminating load impedance 24. The wave energy patterns, as they appear in the two openings 16 and 18, are 180 out of phase with respect to each other.
At the side of the wall 20 opposite the opening 14 is an opening 26 which receives the end of a stripline electromagnetic wave transmission line 28. As shown, the transmission line 28 comprises a center conductor 30 WhIClI IS connected to the wall 20 separating the two output ports 16 and 18. The center conductor 30 is sandwiched between dielectric slabs 32 and 24 which may, for example, be formed from Teflon (trademark) or the like. As best shown in FIG. I, the center conductor 30 is provided with a relatively wide tongue 30A which tapers down to a much narrower section 308. The Teflon slabs 32 and 34 are encases by means of a metallic casing 36 which may comprise a cladding or be formed by vapor deposition techniques.
With the arrangement shown, the wave energy patterns on either side of the wall 20, being 180 out of phase with respect to each other, will be coupled to the center conductor 30 where the wave energy now travels along the stripline conductor in the TEM mode, in much the same manner as wave energy traveling along a coaxial line. Conversely, wave energy in the TEM mode fed into the folded tee 12 will appear at port 10 in the TE mode.
The present invention thus provides a new and improved means for coupling a rectangular waveguide to a stripline transmission line or vice versa. Although the invention has been shown in connection with a certain specific embodiment, it will be readily apparent to those skilled in the art that various changes in form and arrangement of parts may be made to suit requirements without departing from the spirit and scope of the invention.
Iclaim:
1. Apparatus for coupling electromagnetic energy from a rectangular. waveguide to a stripline transmission line comprising a folded tee junction having an input port connected to a waveguide, a pair of parallel superimposed output ports disposed at right angles to said input port and separated by a wall between the two, the wave energy in the respective output ports being out of phase with respect to each other, a stripline transmission line comprising an inner conductor sandwiched between the dielectric slabs and having an outer layer of electrical conducting material on either side of said inner conductor, means connecting said outer layers of said stripline transmission line to the wall of said tee junction, said inner conductor of the stripline transmission line lying in essentially the same plane as the wall between said parallel output ports, and a load impedance disposed on the side of said input port of the folded tee junction opposite said parallel output ports.
2. The apparatus of claim 1 wherein wave energy in said rectangular waveguide is propagated in the TE. mode.
3. The apparatus of claim 1 wherein said wall separating said parallel output ports is grounded.
4. The apparatus of claim I wherein said inner conductor of the stripline transition line has a width adjacent said wall between the output ports substantially equal to that of the wall but tapers down to a width less than that of the wall.
5. The apparatus of claim I wherein wave energy is propagated through said stripline transition line in the TEM mode.

Claims (5)

1. Apparatus for coupling electromagnetic energy from a rectangular waveguide to a stripline transmission line comprising a folded tee junction having an input port connected to a waveguide, a pair of parallel superimposed output ports disposed at right angles to said input port and separated by a wall between the two, the wave energy in the respective output ports being 180* out of phase with respect to each other, a stripline transmission line comprising an inner conductor sandwiched between the dielectric slabs and having an outer layer of electrical conducting material on either side of said inner conductor, means connecting said outer layers of said stripline transmission line to the wall of said tee junction, said inner conductor of the stripline transmission line lying in essentially the same plane as the wall between said parallel output ports, and a load impedance disposed on the side of said input port of the folded tee junction opposite said parallel output ports.
2. The apparatus of claim 1 wherein wave energy in said rectangular waveguide is propagated in the TE10 mode.
3. The apparatus of claim 1 wherein said wall separating said parallel output ports is grounded.
4. The apparatus of claim 1 wherein said inner conductor of the stripline transition line has a width adjacent said wall between the output ports substantially equal to that of the wall but tapers down to a width less than that of the wall.
5. The apparatus of claim 1 wherein wave energy is propagated through said stripline transition line in the TEM mode.
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Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3725829A (en) * 1971-07-14 1973-04-03 Itek Corp Electrical connector
US3732508A (en) * 1970-12-23 1973-05-08 Fujitsu Ltd Strip line to waveguide transition
US4453142A (en) * 1981-11-02 1984-06-05 Motorola Inc. Microstrip to waveguide transition
US4562416A (en) * 1984-05-31 1985-12-31 Sanders Associates, Inc. Transition from stripline to waveguide
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
US5063363A (en) * 1989-07-07 1991-11-05 Thomson-Csf Electromagnetic energy radiation pick-up
US5361049A (en) * 1986-04-14 1994-11-01 The United States Of America As Represented By The Secretary Of The Navy Transition from double-ridge waveguide to suspended substrate
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
EP0954049A2 (en) * 1998-04-28 1999-11-03 Matsushita Electric Industrial Co., Ltd. Circuit board bonding method, branch circuit and its designing method, waveguide-microstrip transition, and application to HF circuit, antenna and communication system
US6002305A (en) * 1997-09-25 1999-12-14 Endgate Corporation Transition between circuit transmission line and microwave waveguide
US6268781B1 (en) * 1997-09-10 2001-07-31 Hughes Electronics Corporation Planar waveguide-to-stripline adapter
US20150311576A1 (en) * 2012-11-02 2015-10-29 Nec Corporation Semiconductor package and semiconductor package mounting structure
US10468736B2 (en) * 2017-02-08 2019-11-05 Aptiv Technologies Limited Radar assembly with ultra wide band waveguide to substrate integrated waveguide transition
US11362436B2 (en) 2020-10-02 2022-06-14 Aptiv Technologies Limited Plastic air-waveguide antenna with conductive particles
US11444364B2 (en) 2020-12-22 2022-09-13 Aptiv Technologies Limited Folded waveguide for antenna
US11502420B2 (en) 2020-12-18 2022-11-15 Aptiv Technologies Limited Twin line fed dipole array antenna
US11527808B2 (en) 2019-04-29 2022-12-13 Aptiv Technologies Limited Waveguide launcher
US11616306B2 (en) 2021-03-22 2023-03-28 Aptiv Technologies Limited Apparatus, method and system comprising an air waveguide antenna having a single layer material with air channels therein which is interfaced with a circuit board
US11626668B2 (en) 2020-12-18 2023-04-11 Aptiv Technologies Limited Waveguide end array antenna to reduce grating lobes and cross-polarization
US11668787B2 (en) 2021-01-29 2023-06-06 Aptiv Technologies Limited Waveguide with lobe suppression
US11681015B2 (en) 2020-12-18 2023-06-20 Aptiv Technologies Limited Waveguide with squint alteration
US11721905B2 (en) 2021-03-16 2023-08-08 Aptiv Technologies Limited Waveguide with a beam-forming feature with radiation slots
US11749883B2 (en) 2020-12-18 2023-09-05 Aptiv Technologies Limited Waveguide with radiation slots and parasitic elements for asymmetrical coverage
US11757166B2 (en) 2020-11-10 2023-09-12 Aptiv Technologies Limited Surface-mount waveguide for vertical transitions of a printed circuit board
US11901601B2 (en) 2020-12-18 2024-02-13 Aptiv Technologies Limited Waveguide with a zigzag for suppressing grating lobes
US11949145B2 (en) 2021-08-03 2024-04-02 Aptiv Technologies AG Transition formed of LTCC material and having stubs that match input impedances between a single-ended port and differential ports

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3462713A (en) * 1967-07-19 1969-08-19 Bell Telephone Labor Inc Waveguide-stripline transducer
US3483489A (en) * 1968-01-31 1969-12-09 Bell Telephone Labor Inc End launch stripline-waveguide transducer

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3462713A (en) * 1967-07-19 1969-08-19 Bell Telephone Labor Inc Waveguide-stripline transducer
US3483489A (en) * 1968-01-31 1969-12-09 Bell Telephone Labor Inc End launch stripline-waveguide transducer

Cited By (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3732508A (en) * 1970-12-23 1973-05-08 Fujitsu Ltd Strip line to waveguide transition
US3725829A (en) * 1971-07-14 1973-04-03 Itek Corp Electrical connector
US4453142A (en) * 1981-11-02 1984-06-05 Motorola Inc. Microstrip to waveguide transition
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
US4562416A (en) * 1984-05-31 1985-12-31 Sanders Associates, Inc. Transition from stripline to waveguide
US5361049A (en) * 1986-04-14 1994-11-01 The United States Of America As Represented By The Secretary Of The Navy Transition from double-ridge waveguide to suspended substrate
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
US5063363A (en) * 1989-07-07 1991-11-05 Thomson-Csf Electromagnetic energy radiation pick-up
US6268781B1 (en) * 1997-09-10 2001-07-31 Hughes Electronics Corporation Planar waveguide-to-stripline adapter
US6002305A (en) * 1997-09-25 1999-12-14 Endgate Corporation Transition between circuit transmission line and microwave waveguide
EP0954049A2 (en) * 1998-04-28 1999-11-03 Matsushita Electric Industrial Co., Ltd. Circuit board bonding method, branch circuit and its designing method, waveguide-microstrip transition, and application to HF circuit, antenna and communication system
EP0954049A3 (en) * 1998-04-28 2002-07-24 Matsushita Electric Industrial Co., Ltd. Circuit board bonding method, branch circuit and its designing method, waveguide-microstrip transition, and application to HF circuit, antenna and communication system
EP1321998A1 (en) * 1998-04-28 2003-06-25 Matsushita Electric Industrial Co., Ltd. Waveguide-microstrip transition and application to HF circuit
US6592021B2 (en) 1998-04-28 2003-07-15 Matsushita Electric Industrial Co., Ltd Circuit board bonding method, branch circuit and its designing method, waveguide-microstrip transition, and application to HF circuit, antenna and communication system
US20150311576A1 (en) * 2012-11-02 2015-10-29 Nec Corporation Semiconductor package and semiconductor package mounting structure
US9577310B2 (en) * 2012-11-02 2017-02-21 Nec Corporation Semiconductor package and semiconductor package mounting structure
US10468736B2 (en) * 2017-02-08 2019-11-05 Aptiv Technologies Limited Radar assembly with ultra wide band waveguide to substrate integrated waveguide transition
US11670829B2 (en) 2017-02-08 2023-06-06 Aptiv Technologies Limited. Radar assembly with rectangular waveguide to substrate integrated waveguide transition
US10833385B2 (en) * 2017-02-08 2020-11-10 Aptiv Technologies Limited Radar assembly with ultra wide band waveguide to substrate integrated waveguide transition
US11527808B2 (en) 2019-04-29 2022-12-13 Aptiv Technologies Limited Waveguide launcher
US11362436B2 (en) 2020-10-02 2022-06-14 Aptiv Technologies Limited Plastic air-waveguide antenna with conductive particles
US11728576B2 (en) 2020-10-02 2023-08-15 Aptiv Technologies Limited Plastic air-waveguide antenna with conductive particles
US11757166B2 (en) 2020-11-10 2023-09-12 Aptiv Technologies Limited Surface-mount waveguide for vertical transitions of a printed circuit board
US11749883B2 (en) 2020-12-18 2023-09-05 Aptiv Technologies Limited Waveguide with radiation slots and parasitic elements for asymmetrical coverage
US11626668B2 (en) 2020-12-18 2023-04-11 Aptiv Technologies Limited Waveguide end array antenna to reduce grating lobes and cross-polarization
US11681015B2 (en) 2020-12-18 2023-06-20 Aptiv Technologies Limited Waveguide with squint alteration
US11502420B2 (en) 2020-12-18 2022-11-15 Aptiv Technologies Limited Twin line fed dipole array antenna
US11901601B2 (en) 2020-12-18 2024-02-13 Aptiv Technologies Limited Waveguide with a zigzag for suppressing grating lobes
US11444364B2 (en) 2020-12-22 2022-09-13 Aptiv Technologies Limited Folded waveguide for antenna
US11757165B2 (en) 2020-12-22 2023-09-12 Aptiv Technologies Limited Folded waveguide for antenna
US11668787B2 (en) 2021-01-29 2023-06-06 Aptiv Technologies Limited Waveguide with lobe suppression
US11721905B2 (en) 2021-03-16 2023-08-08 Aptiv Technologies Limited Waveguide with a beam-forming feature with radiation slots
US11616306B2 (en) 2021-03-22 2023-03-28 Aptiv Technologies Limited Apparatus, method and system comprising an air waveguide antenna having a single layer material with air channels therein which is interfaced with a circuit board
US11949145B2 (en) 2021-08-03 2024-04-02 Aptiv Technologies AG Transition formed of LTCC material and having stubs that match input impedances between a single-ended port and differential ports

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