US2926317A - Transmission line - Google Patents

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US2926317A
US2926317A US415493A US41549354A US2926317A US 2926317 A US2926317 A US 2926317A US 415493 A US415493 A US 415493A US 41549354 A US41549354 A US 41549354A US 2926317 A US2926317 A US 2926317A
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conductors
transmission line
planar
conductor
outer conductors
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US415493A
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Blitz Daniel
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Lockheed Corp
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Sanders Associates Inc
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    • 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
    • H01P3/02—Waveguides; Transmission lines of the waveguide type with two longitudinal conductors
    • H01P3/08—Microstrips; Strip lines
    • H01P3/085—Triplate lines

Definitions

  • the present invention relates to transmission lines. More particularly, the present invention relates to the use of transmission lines such as are used in association with high frequency electronic devices.
  • wave guides In modern shortwave techniques, transmission lines in a form familiarly known as wave guides are widely used. Because of the construction these wave guides occupy a large volume of space, are heavy and are expensive to manufacture.
  • a transmission line composed of inner conductors of finite width and spaced between outer conductors that are parallel and of infinite width would permit no radiation of high frequency energy from the line.
  • a further object of the invention is to provide an improved transmission line of the character described in which the relative movement of its parts has substantially no effect on the electrical characteristics of the line.
  • a composite, high-frequency, electric transmission line includes a pair of thin, elongated, parallel, planar, etched-circuit-type, outer conductors providing electrical ground planes.
  • a thin, elongated planar, etched-circuittype inner conductor is disposed in parallel with and between the outer conductors.
  • the inner conductor is of lesser width than the outer conductors.
  • a solid dielectric, planar insulating panel wider than the inner conductor is disposed between the inner conductor and one of the outer conductors for securing the inner conductor in insulated spaced relation with respect to the outer conductor.
  • Another solid dielectric planar insulating panel is secured to the other of the outer conductors and is disposed between the inner and the otherouter conductor.
  • a pair of thin, elongated, planar, etched-circuit-type, capacitive, strip conductors are affixed to a surface of the first insulated panel adjacent opposite sides of the inner condoctor.
  • the capacitive strip conductors are spaced transversely less than a half wave length apart at the highest operating frequency.
  • a second pair of thin, elongated, etched-circuit-type capacitive stripconductors are affixed to the second insulating panel. They are so disposed as to register with the first pair of strip conductors.
  • Conductive rods extend from the outer conductors through the insulating panel through the adjacent strip conductors corresponding with each outer conductor to effect an electrical coupling between the outer conductors. This enables relative movement therebetween without substantially varying the electrical characteristics of the transmission line.
  • Fig. 1 is a three-dimensional view of a three-plate transmission line embodying this invention
  • Fig. 2 is a cross-sectional view of a four-plate transmission line embodying the present invention
  • Fig. 3 is a cross-sectional view of a four-plate transmission line illustrating another embodiment of the invention.
  • Fig. 4 is a schematic diagram of a source of energy connected to the transmission line of Fig. l;
  • Fig. 5 is a schematic diagram of a source of energy connected to the transmission line of Fig. 2.
  • conductor 1 is attached to the upper surface of a dielectric 2 with a suitable cement.
  • An inner conductor 3 is attached to the under surface of the dielectric 2.
  • An outer conductor 5 is attached to the under surface of a dielectric 4.
  • Pins 7 pierce outer conductor 1, dielectric 2 and contact strip 6.
  • Pins 7 pierce outer conductor 5 and dielectric 4.
  • Outer couductors land 5 are capacitively coupled through. contact strip 6 and pins 7 because of their proximity.
  • the pins 7 are positioned in pairs in the direction of the length of the line at intervals 8 less than a quarter-wave long at the operating frequency and at transverse intervals 10 less than a half-wave long at the operating frequency. This arrangement permits limited relative transverse movement between the line sections as shown, without substantially varying the electrical characteristics of the line.
  • Fig. 2 there is shown an embodiment of this invention wherein a four-plate line is provided.
  • the inner conductors 13 are connected to the same voltage source. Since the fields between each inner conductor and its associated outer conductor are maintained relatively constant, limited transverse motion between the inner conductors in the direction as indicated at 9 is permissible without substantially varying the electrical characteristics of the line. As shown in Fig. 3, inner conductor 15 may to permit limited transverse motion between them in the direction as indicated at 17.
  • a source 16 of high frequency energy is shown connected to the three-plate transmission line of Fig. 1, viewed in longitudinal crosssection.
  • the inner conductor 3 is connected to one electrical side; the outer conductors 1 and 5 are connected together to the ground side of source 16.
  • Fig. 5 the source 16 is shown connected to the fourplate transmission line of Fig. 2, viewed in longitudinal cross-section.
  • the inner conductors 13 are connected together to one side of the source; the outer conductors are connected together to the ground side 15, as shown.
  • a composite, high-frequency, electric, transmission line comprising: a pair of thin, elongated, parallel, planar, etched-circuit-type, outer conductors providing electrical ground planes; a thin, elongated, planar, etched-circuit-type, inner conductor disposed in parallel with and between said outer conductors, said inner conductor being of lesser width than said outer conductors; a first solid, dielectric, planar, insulating panel wider than said inner conductor and disposed between said inner conductor and one of said outer conductors for securing said inner conductor in insulated, spaced relation with respect to said outer conductor; a second solid, dielectric, planar, insulating panel secured to the other of said outer conductors and disposed between said inner and said other outer conductor; a pair of thin, elongated, planar, etched-circuit-type, capacitive, strip conductors aflixed to a surface of said first insulating panel adjacent a side of said inner conductor;
  • a composite, high-frequency, electric, transmission line comprising: a pair of thin, elongated, parallel, planar, etched-circuit-type, outer conductors providing electrical ground planes; a thin, elongated, planar, etchedcircuit-type inner conductor disposed in parallel with and between said outer conductors, said inner conductor being of lesser width than said outer conductors; a first solid, dielectric, planar, insulating panel wider than said inner conductor and disposed between said inner conductor and one of said outer conductors for securing said inner conductor in insulated, spaced relation with respect to said outer conductor; a second solid, dielectric, planar, insulating panel secured to the other of said outer conductors and disposed between said inner and said other outer conductor; a pair of thin elongated, planar, etchedcircuit-type, capacitive, strip conductors affixed to a surface of said first insulating panel laterally adjacent opposite sides of said inner conductor and spaced transverse
  • a composite, high-frequency, electric, transmission line comprising: a pair of thin, elongated, parallel, planar, etched-circuit-type, outer conductors providing electrical ground planes; a pair of solid dielectric, planar, insulating panels secured to said outer conductors and disposed between said outer conductors; a pair of thin, elongated, planar, etched-circuit-type, inner conductors disposed in register and in parallel with and between 4 said outer conductors, said inner conductors being of lesser width than said outer conductors and bonded to the inner surfaces of said solid, insulating panels; pairs of thin, elongated, planar, etched-circuit-type, capacitive, strip conductors afiixed to the inner surface of each insulating panel laterally adjacent opposite sides of each inner conductor and spaced transversely less than onehalf a wave length apart attthe highest operating frequency, the thickness of said strip conductors being so chosen relative to said inner conductors as to provide
  • a composite, high-frequency, electric transmission line comprising: a pair of thin, elongated, parallel, planar, etched-circuit-type, outer conductors providing electrical ground planes; a pair of solid, dielectric, planar, insulating panels secured to said outer conductors and disposed between said outer conductors; a pair of thin, elongated, planar, etched-circuit-type, inner conductors of differing widths disposed in register and in parallel with and between said outer conductors, said inner conductors being of lesser width than said outer conductors and bonded to the inner surfaces of said solid insulating panels; pairs of thin elongated, planar, etched-circuittype, capacitive, strip conductors atfixed to a surface of each insulating panel laterally adjacent opposite sides of each of said inner conductors and spaced transversely less than one-half wave length apart at the highest operating frequency, the thickness of said strip conductors being so chosen relative to said inner conductors as to provide a space between
  • a composite, high-frequency, electric, transmission line comprising: a pair of thin, elongated, parallel, planar, etched-circuit-type, outer conductors providing electrical ground planes; a pair of solid, dielectric, planar, insulating panels secured to each of said outer conductors and disposed between said outer conductors; pairs of thin, elongated, planar, etched-circuit-type, inner conductors of differing widths disposed in register and in parallel with and between.
  • said outer conductors said inner conductors being of lesser width than said outer conductors and bonded to the inner surfaces of said insulating panels; pairs of thin, elongated, planar, etched-circuit-type capacitive strip conductors afiixed to the surfaces of each of said insulating panels laterally adjacent opposite sides of said inner conductors and spaced transversely less than one-half wave length apart at the highest operating frequency, said strip conductors being in register and of a thickness chosen relative to said inner conductors as to provide a space between adjacent ones of said strip conductors in register; and conductive rods extending from said outer conductors through said'insulating panels to said adjacent strip conductors corresponding with each outer conductor to effect an electrical coupling between said outer conductors and to enable relative movement therebetween without substantially varying the electrical characteristics of said transmission line.

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  • Waveguides (AREA)

Description

Feb. 23, 1960 D. BLITZ TRANSMISSION LINE Filed March 11, 1954 n. 3 w/ w. .W. F m M ha v. i m m z 9 m .m 7 S F N/a I! w Daniel Blitz IN V EN TOR.
United States Patent TRANSMISSION LINE Daniel Blitz, Boston, Mass., assignor, by mesne assignments, to Sanders Associates, Incorporated, Nashua, N.H., a corporation of Delaware Application March 11, 1954, Serial No. 415,493
Claims. (Cl. 333-84) The present invention relates to transmission lines. More particularly, the present invention relates to the use of transmission lines such as are used in association with high frequency electronic devices.
In modern shortwave techniques, transmission lines in a form familiarly known as wave guides are widely used. Because of the construction these wave guides occupy a large volume of space, are heavy and are expensive to manufacture.
Theoretically, a transmission line composed of inner conductors of finite width and spaced between outer conductors that are parallel and of infinite width would permit no radiation of high frequency energy from the line. By selecting the width of the outer conductors to be sufiicient- 1y greater than that of the inner conductors, a transmission line of relatively low loss due to radiationis obtained.
Asan alternative to wave guides, these configurations may be more readily employed with printed and etched circuit techniques. A propensity of these alternative con figurations toward the propagation of high frequency energy in undesirable modes has been the source of much difficulty.
It is therefore an object of the present invention to provide an improved transmission line that excludes undesirable propagation modes of high frequency energy; and
A further object of the invention is to provide an improved transmission line of the character described in which the relative movement of its parts has substantially no effect on the electrical characteristics of the line.
Other and further objects of the invention will be apparent from the following description of a typical embodiment thereof, taken in connection with the accompanying drawings.
In accordance with the invention there is provided a composite, high-frequency, electric transmission line. The line includes a pair of thin, elongated, parallel, planar, etched-circuit-type, outer conductors providing electrical ground planes. A thin, elongated planar, etched-circuittype inner conductor is disposed in parallel with and between the outer conductors. The inner conductor is of lesser width than the outer conductors. A solid dielectric, planar insulating panel wider than the inner conductor is disposed between the inner conductor and one of the outer conductors for securing the inner conductor in insulated spaced relation with respect to the outer conductor. Another solid dielectric planar insulating panel is secured to the other of the outer conductors and is disposed between the inner and the otherouter conductor. A pair of thin, elongated, planar, etched-circuit-type, capacitive, strip conductors are affixed to a surface of the first insulated panel adjacent opposite sides of the inner condoctor. The capacitive strip conductors are spaced transversely less than a half wave length apart at the highest operating frequency. A second pair of thin, elongated, etched-circuit-type capacitive stripconductors are affixed to the second insulating panel. They are so disposed as to register with the first pair of strip conductors. The
facture and reliability of operation of these be wider than conductor 14 thickness of the strip conductors is so chosen relative to the inner conductor as to provide a space between adjacent ones of the strip conductors in register. Conductive rods extend from the outer conductors through the insulating panel through the adjacent strip conductors corresponding with each outer conductor to effect an electrical coupling between the outer conductors. This enables relative movement therebetween without substantially varying the electrical characteristics of the transmission line.
In the accompanying drawings:
Fig. 1 is a three-dimensional view of a three-plate transmission line embodying this invention;
Fig. 2 is a cross-sectional view of a four-plate transmission line embodying the present invention;
Fig. 3 is a cross-sectional view of a four-plate transmission line illustrating another embodiment of the invention;
Fig. 4 is a schematic diagram of a source of energy connected to the transmission line of Fig. l; and
Fig. 5 is a schematic diagram of a source of energy connected to the transmission line of Fig. 2.
Referring now in more detail to the drawings, an outer.
conductor 1 is attached to the upper surface of a dielectric 2 with a suitable cement. An inner conductor 3 is attached to the under surface of the dielectric 2. An outer conductor 5 is attached to the under surface of a dielectric 4. Pins 7 pierce outer conductor 1, dielectric 2 and contact strip 6. Pins 7 pierce outer conductor 5 and dielectric 4. Outer couductors land 5 are capacitively coupled through. contact strip 6 and pins 7 because of their proximity. The pins 7 are positioned in pairs in the direction of the length of the line at intervals 8 less than a quarter-wave long at the operating frequency and at transverse intervals 10 less than a half-wave long at the operating frequency. This arrangement permits limited relative transverse movement between the line sections as shown, without substantially varying the electrical characteristics of the line.
In Fig. 2 there is shown an embodiment of this invention wherein a four-plate line is provided. The inner conductors 13 are connected to the same voltage source. Since the fields between each inner conductor and its associated outer conductor are maintained relatively constant, limited transverse motion between the inner conductors in the direction as indicated at 9 is permissible without substantially varying the electrical characteristics of the line. As shown in Fig. 3, inner conductor 15 may to permit limited transverse motion between them in the direction as indicated at 17.
In Fig. 4 a source 16 of high frequency energy is shown connected to the three-plate transmission line of Fig. 1, viewed in longitudinal crosssection. The inner conductor 3 is connected to one electrical side; the outer conductors 1 and 5 are connected together to the ground side of source 16.
In Fig. 5 the source 16 is shown connected to the fourplate transmission line of Fig. 2, viewed in longitudinal cross-section. The inner conductors 13 are connected together to one side of the source; the outer conductors are connected together to the ground side 15, as shown.
Since the physical parameters of the transmission line as described above may be varied without substantially reducing the efficiency of the line, the economy of manudevices is greatly enhanced.
While there has been hereinbefore described what is at present considered a preferred embodiment of the invention, it will be apparent that many and various changes and modifications may be made with respect to the embodiment illustrated without departing from the spirit of the invention. It will be understood, therefore, that all those changes and modifications as fall fairly within the scope of the present invention, as defined in the appended claims, are to be considered as a part of the present invention.
What is claimed is: V
l. A composite, high-frequency, electric, transmission line, comprising: a pair of thin, elongated, parallel, planar, etched-circuit-type, outer conductors providing electrical ground planes; a thin, elongated, planar, etched-circuit-type, inner conductor disposed in parallel with and between said outer conductors, said inner conductor being of lesser width than said outer conductors; a first solid, dielectric, planar, insulating panel wider than said inner conductor and disposed between said inner conductor and one of said outer conductors for securing said inner conductor in insulated, spaced relation with respect to said outer conductor; a second solid, dielectric, planar, insulating panel secured to the other of said outer conductors and disposed between said inner and said other outer conductor; a pair of thin, elongated, planar, etched-circuit-type, capacitive, strip conductors aflixed to a surface of said first insulating panel adjacent a side of said inner conductor and spaced tranversely less than a half wave length apart at the operating frequency; a second pair of thin, elongated, etched-circuit-type, capacitive strip conductors affixed to said second insulating panel and so disposed as to register with the first said pair of strip conductors, the thickness of said strip conductors being so chosen relative to saidinner conductor as to provide a space between adjacent ones of said strip conductors in register; and conductive rods extending from Said outer conductors through said insulating panel to said adjacent strip conductors corresponding with each outer conductor to eifect an electrical coupling between said outer conductors and to enable relative movement therebetween without substantially varying the electrical characteristics of said transmission line.
2. A composite, high-frequency, electric, transmission line, comprising: a pair of thin, elongated, parallel, planar, etched-circuit-type, outer conductors providing electrical ground planes; a thin, elongated, planar, etchedcircuit-type inner conductor disposed in parallel with and between said outer conductors, said inner conductor being of lesser width than said outer conductors; a first solid, dielectric, planar, insulating panel wider than said inner conductor and disposed between said inner conductor and one of said outer conductors for securing said inner conductor in insulated, spaced relation with respect to said outer conductor; a second solid, dielectric, planar, insulating panel secured to the other of said outer conductors and disposed between said inner and said other outer conductor; a pair of thin elongated, planar, etchedcircuit-type, capacitive, strip conductors affixed to a surface of said first insulating panel laterally adjacent opposite sides of said inner conductor and spaced transversely less than one-half wave length apart at the highest operating frequency; a second pair of thin, elongated, etchedcircuit-type capacitive strip conductors affixed to said second insulating panel and so disposed as to register with the first said pair of strip conductors, thethickness of said strip conductors being so chosen relative to said inner conductor as to provide a space between adjacent ones of said strip conductors in register; and means for supporting and electrically coupling said strip conductors to said outer conductors to enable relative movement of said outer conductors without substantially varying the electrical characteristics of said transmission line.
3. A composite, high-frequency, electric, transmission line, comprising: a pair of thin, elongated, parallel, planar, etched-circuit-type, outer conductors providing electrical ground planes; a pair of solid dielectric, planar, insulating panels secured to said outer conductors and disposed between said outer conductors; a pair of thin, elongated, planar, etched-circuit-type, inner conductors disposed in register and in parallel with and between 4 said outer conductors, said inner conductors being of lesser width than said outer conductors and bonded to the inner surfaces of said solid, insulating panels; pairs of thin, elongated, planar, etched-circuit-type, capacitive, strip conductors afiixed to the inner surface of each insulating panel laterally adjacent opposite sides of each inner conductor and spaced transversely less than onehalf a wave length apart attthe highest operating frequency, the thickness of said strip conductors being so chosen relative to said inner conductors as to provide a space between adjacent ones of said strip conductors in register; and means for supporting said strip conductors to effect an electrical coupling between said outer conductors and to enable relative movement therebetween without substantially varying the electrical characteristics of said transmission line.
4. A composite, high-frequency, electric transmission line, comprising: a pair of thin, elongated, parallel, planar, etched-circuit-type, outer conductors providing electrical ground planes; a pair of solid, dielectric, planar, insulating panels secured to said outer conductors and disposed between said outer conductors; a pair of thin, elongated, planar, etched-circuit-type, inner conductors of differing widths disposed in register and in parallel with and between said outer conductors, said inner conductors being of lesser width than said outer conductors and bonded to the inner surfaces of said solid insulating panels; pairs of thin elongated, planar, etched-circuittype, capacitive, strip conductors atfixed to a surface of each insulating panel laterally adjacent opposite sides of each of said inner conductors and spaced transversely less than one-half wave length apart at the highest operating frequency, the thickness of said strip conductors being so chosen relative to said inner conductors as to provide a space between adjacent ones of said strip conductors in register; and means for supporting said adjacent strip conductors to effect an electrical coupling between said outer conductors and to enable relative movement therebetween without substantially varying the electrical characteristics of said transmission line.
5. A composite, high-frequency, electric, transmission line, comprising: a pair of thin, elongated, parallel, planar, etched-circuit-type, outer conductors providing electrical ground planes; a pair of solid, dielectric, planar, insulating panels secured to each of said outer conductors and disposed between said outer conductors; pairs of thin, elongated, planar, etched-circuit-type, inner conductors of differing widths disposed in register and in parallel with and between. said outer conductors, said inner conductors being of lesser width than said outer conductors and bonded to the inner surfaces of said insulating panels; pairs of thin, elongated, planar, etched-circuit-type capacitive strip conductors afiixed to the surfaces of each of said insulating panels laterally adjacent opposite sides of said inner conductors and spaced transversely less than one-half wave length apart at the highest operating frequency, said strip conductors being in register and of a thickness chosen relative to said inner conductors as to provide a space between adjacent ones of said strip conductors in register; and conductive rods extending from said outer conductors through said'insulating panels to said adjacent strip conductors corresponding with each outer conductor to effect an electrical coupling between said outer conductors and to enable relative movement therebetween without substantially varying the electrical characteristics of said transmission line.
References Cited in the file of this patent UNITED STATES PATENTS 2,155,508 Schelkunoff Apr. 25, 1939 2,445,380 Zottu July 20, 1948 2,603,749 Kock July 15, 1952 (Other references on following page) V E") 6 UNITED STATES PATENTS 570,087 Great Britain June 21, 1945 Grieg Oct 18, 1955 1 601,514 Great Britain May 7, 1948 Blitz Oct. 20, 1957 Sommers Nov. 5, 1957 OTHER REFERENCES v 5 Radio, Electronic Engineering"; September 1951; pp. FOREIGN PATENTS 16 and 31. 7
Great Britain Nov. 25, 1941
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Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3114887A (en) * 1959-05-04 1963-12-17 Microdot Inc High frequency coaxial switch employing strip-line techniques
US3179927A (en) * 1959-07-27 1965-04-20 Siemens Ag Magnetic core matrices
US3221286A (en) * 1961-07-31 1965-11-30 Sperry Rand Corp Connector for printed circuit strip transmission line
US3543198A (en) * 1967-07-21 1970-11-24 Telefunken Patent Conductor arrangement for gigahertz frequency range circuits
FR2328267A1 (en) * 1975-10-16 1977-05-13 Xerox Corp ELECTRICAL CABLE AND COUPLING MEANS
EP0022990A1 (en) * 1979-07-20 1981-01-28 Siemens Aktiengesellschaft Microstrip microwave balun
US4471329A (en) * 1981-03-05 1984-09-11 Italtel Societa Italiana Telecomunicazioni S.P.A. Microwave circuit component for superhigh-frequency signals
US4521755A (en) * 1982-06-14 1985-06-04 At&T Bell Laboratories Symmetrical low-loss suspended substrate stripline
US4581291A (en) * 1983-12-29 1986-04-08 Bongianni Wayne L Microminiature coaxial cable and methods manufacture
US4605915A (en) * 1984-07-09 1986-08-12 Cubic Corporation Stripline circuits isolated by adjacent decoupling strip portions
US4647878A (en) * 1984-11-14 1987-03-03 Itt Corporation Coaxial shielded directional microwave coupler
US4673904A (en) * 1984-11-14 1987-06-16 Itt Corporation Micro-coaxial substrate
US4703289A (en) * 1985-12-17 1987-10-27 Motorola, Inc. Distributed resonator stripline circulator and method for fabricating same
US4729510A (en) * 1984-11-14 1988-03-08 Itt Corporation Coaxial shielded helical delay line and process
US4801905A (en) * 1987-04-23 1989-01-31 Hewlett-Packard Company Microstrip shielding system
US4816618A (en) * 1983-12-29 1989-03-28 University Of California Microminiature coaxial cable and method of manufacture
DE4032260C1 (en) * 1990-10-11 1992-04-23 Ant Nachrichtentechnik Gmbh, 7150 Backnang, De Microwave strip conductor - has conductive track formed on surface of substrate, e.g. gallium arsenide
EP0532770A1 (en) * 1991-04-08 1993-03-24 NGK Spark Plug Co. Ltd. Microwave strip line filter
WO1997034336A2 (en) * 1996-03-13 1997-09-18 Ericsson Inc. Rf printed circuit module and method of making same
US6072375A (en) * 1998-05-12 2000-06-06 Harris Corporation Waveguide with edge grounding
US6133805A (en) * 1996-10-31 2000-10-17 The Whitaker Corporation Isolation in multi-layer structures
US20030179050A1 (en) * 2001-12-28 2003-09-25 Brunker David L. Grouped element transmission channel link with power delivery aspects
US20050176268A1 (en) * 2003-03-14 2005-08-11 Victor Zaderej Grouped element transmission channel link with pedestal aspects
US20080048796A1 (en) * 2006-08-22 2008-02-28 Yigal Shaul High speed signal transmission
US20080309349A1 (en) * 2007-06-15 2008-12-18 Computer Access Technology Corporation Flexible interposer system
US20110036617A1 (en) * 2007-08-03 2011-02-17 Leonid Kokurin Compensating Conductive Circuit
US8006075B2 (en) 2009-05-21 2011-08-23 Oracle America, Inc. Dynamically allocated store queue for a multithreaded processor
US9627736B1 (en) * 2013-10-23 2017-04-18 Mark W. Ingalls Multi-layer microwave crossover connected by vertical vias having partial arc shapes
US11557823B2 (en) 2020-01-29 2023-01-17 Nokia Shanghai Bell Co., Ltd Antenna component
WO2023163034A1 (en) * 2022-02-22 2023-08-31 住友電工プリントサーキット株式会社 Printed wiring board

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US2445380A (en) * 1944-02-16 1948-07-20 Girdler Corp Coaxial transmission line
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US2155508A (en) * 1936-10-31 1939-04-25 Bell Telephone Labor Inc Wave guide impedance element and network
GB601514A (en) * 1939-09-01 1948-05-07 Cole E K Ltd Improvements in resonant electric artificial lines
GB541380A (en) * 1940-03-08 1941-11-25 Standard Telephones Cables Ltd Improvements in or relating to electric transmission networks
GB570087A (en) * 1943-05-26 1945-06-21 Gen Electric Co Ltd Improvements in electrical transmission lines
US2445380A (en) * 1944-02-16 1948-07-20 Girdler Corp Coaxial transmission line
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US2721312A (en) * 1951-06-30 1955-10-18 Itt Microwave cable
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Cited By (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3114887A (en) * 1959-05-04 1963-12-17 Microdot Inc High frequency coaxial switch employing strip-line techniques
US3179927A (en) * 1959-07-27 1965-04-20 Siemens Ag Magnetic core matrices
US3221286A (en) * 1961-07-31 1965-11-30 Sperry Rand Corp Connector for printed circuit strip transmission line
US3543198A (en) * 1967-07-21 1970-11-24 Telefunken Patent Conductor arrangement for gigahertz frequency range circuits
FR2328267A1 (en) * 1975-10-16 1977-05-13 Xerox Corp ELECTRICAL CABLE AND COUPLING MEANS
EP0022990A1 (en) * 1979-07-20 1981-01-28 Siemens Aktiengesellschaft Microstrip microwave balun
US4471329A (en) * 1981-03-05 1984-09-11 Italtel Societa Italiana Telecomunicazioni S.P.A. Microwave circuit component for superhigh-frequency signals
US4521755A (en) * 1982-06-14 1985-06-04 At&T Bell Laboratories Symmetrical low-loss suspended substrate stripline
US4581291A (en) * 1983-12-29 1986-04-08 Bongianni Wayne L Microminiature coaxial cable and methods manufacture
US4816618A (en) * 1983-12-29 1989-03-28 University Of California Microminiature coaxial cable and method of manufacture
US4605915A (en) * 1984-07-09 1986-08-12 Cubic Corporation Stripline circuits isolated by adjacent decoupling strip portions
US4647878A (en) * 1984-11-14 1987-03-03 Itt Corporation Coaxial shielded directional microwave coupler
US4673904A (en) * 1984-11-14 1987-06-16 Itt Corporation Micro-coaxial substrate
US4729510A (en) * 1984-11-14 1988-03-08 Itt Corporation Coaxial shielded helical delay line and process
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