US2812501A - Transmission line - Google Patents

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Publication number
US2812501A
US2812501A US414165A US41416554A US2812501A US 2812501 A US2812501 A US 2812501A US 414165 A US414165 A US 414165A US 41416554 A US41416554 A US 41416554A US 2812501 A US2812501 A US 2812501A
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Prior art keywords
outer conductors
inner conductor
transmission line
parallel
elongated
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Expired - Lifetime
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US414165A
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Donald J Sommers
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Lockheed Sanders Inc
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Lockheed Sanders Inc
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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01PWAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P3/00Waveguides; Transmission lines of the waveguide type
    • H01P3/02Waveguides; Transmission lines of the waveguide type with two longitudinal conductors
    • H01P3/08Microstrips; Strip lines
    • H01P3/085Triplate lines
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00Printed circuits
    • H05K1/02Details
    • H05K1/0213Electrical arrangements not otherwise provided for
    • H05K1/0216Reduction of cross-talk, noise or electromagnetic interference
    • H05K1/0218Reduction of cross-talk, noise or electromagnetic interference by printed shielding conductors, ground planes or power plane
    • H05K1/0219Printed shielding conductors for shielding around or between signal conductors, e.g. coplanar or coaxial printed shielding conductors
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/09Shape and layout
    • H05K2201/09209Shape and layout details of conductors
    • H05K2201/095Conductive through-holes or vias
    • H05K2201/09618Via fence, i.e. one-dimensional array of vias
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00Apparatus or processes for manufacturing printed circuits
    • H05K3/40Forming printed elements for providing electric connections to or between printed circuits
    • H05K3/42Plated through-holes or plated via connections
    • H05K3/429Plated through-holes specially for multilayer circuits, e.g. having connections to inner circuit layers

Description

Nov. 5, 1957 D. J. SOMMERS TRANSMISSION LINE Filed March 4. 1954 Fig.5

Donald J, Sommers INVTOR.

Attorney United States Patent TRANSMISSION LINE Donald J. Sommers, Brookline, N. H'., assignor, by mesne assignments, to Sanders Associates, Inc., Nashua, N. H., acorporation of Delaware Application March 4, 1954, Serial No. 414,165

6 Claims. (Cl; 333-95 The present invention relates to transmission lines. More particularly, the invention relates to transmission lines such as are used in association with. high frequency electronic devices.

In modern shortwave techniques, transmission lines in forms familiarly known in the art as wave: guides and coaxial lines are widely used. Because of the construction, these lines occupy a large amount 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, which 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 sufiiciently greater than that of the. inner conductors, a transmission line of relatively low loss due to radiation is obtained.

As an alternative to Wave guides, such configurations may be adapted to printed and etched circuit techniques. As is well known in the prior art, configurations. that are in fact adapted to etched-circuit-techniqucsi involve the use of relatively thin conductors, for example, copper foil .00135 or .0027 of an inch thick. The propensity of such alternative configurations toward the propagation of high frequency energy in undesirable modes has, however, been the source of much difiiculty.

It is therefore an object of the present invention to provide an improved transmission line utilizing printed and etched circuit techniques which avoids the undesirable propagation modes of high frequency energy.

Other and further objects of the invention will be apparent from the following description of typical embodiments thereof, taken in connection with the accompanying drawings.

in accordance with this invention there is provided a composite high frequency electric transmission line structure, comprising a pair of elongated parallel planar dielectric insulators with a thin, elongated, planar, inner conductor disposed in parallel with and between the insulators, the inner conductor being narrower than the'i'nsulators. The transmission line also comprises a pair of thin, elongated, parallel, planar, outer conductors afiixed to the outside surface of the insulators in insulated spaced relation to and in parallel with the inner conductors. The outer conductors are wider than the inner conductor. The transmission line also comprises conductive rods extending from the outer conductors through the dielectric insulators adjacent the narrower sides of the inner conductor for providing an electrical connection between the outer conductors. longitudinally and'transversely less than a half wave length apart at the operating frequency to provide a transmission line for propagating electromagnetic energy consisting substantially of apureTEM mode,

In the accompanying drawings: 7

Fig. 1 is a three-dimensional view of a preferred embodiment of this invention;

The rods are spaced Fig. 2 is a schematic diagram of a source of high frequency energy connected to the embodiment of Fig. 1, shown in section;

Fig. 3 is a cross-sectional view of a three-plate transmission line illustrating the disposition of the electric and magnetic fields;

Fig. 4 is a cross-sectional view of the line in Fig. 4, illustrating a distorted field pattern; and

Fig. 5 is a cross-sectional view of a modification of the line in Fig. 3.

Referring now in more detail to the drawings, a thin,

elongated, parallel, planar, etched-circuit-type conductor 1 is attached to the upper surface of the elongated planar, dielectric insulator 2 with a suitable cement. A thin, elongated, planar, etched-circuit-type, inner conductor 3 is attached to the under surface of the dielectric 2 and to the upper surface of a dielectric 4. The dielectric insulators are wider than and extend transversely beyond the limits of the inner conductor 3 as shown. An elongated, outer conductor 5, similar to conductor 1 above, is attached to the under surface of the dielectric 4 in-parallel with the insulators 2 and 4 and the conductors 1 and 3. The outer conductors 1' and 5 extend transversely beyond the limits of the inner conduct-or 3, the conductors 1 and 5 being wider than the inner conductor 3. Metallic rods 6 provide an electrical connection between the conductors l and 5. The rods may be positioned in pairs separated transversely by less than a half-wave length at the operating frequency, as shown, and in the direction of the length of the line at longitudinal intervals 8'which are preferably less than a quarter-wave length long. The rods 6 need not necessarily be spaced symmetrically as long as a suitable spacing therebetween is chosen.

In Fig. 2 the outer conductors 1 and 5 are connected to the ground side of a source 13 of high frequency energy. The other side of the source 13 is connected to the inner conductor 3.

The three-plate transmission line has similar characteristics tocoaxial transmission lines and supports the same mode of propagation, familiarly known in the art as TEM. The three-plate line comprises two parallel outer conductors 14 and a parallel inner conductor 16 of lesser width, as shown in Fig. 3. Electric'fields i7 and magnetic fields 18 are balanced if the inner conductor 16 is centrally located with respect to the outer conductors 14 and 15, that is, d, equals d,. A dielectric material separating the conductors must be mechanically and electrically homogeneous to maintain the balance of fields as shown. The term TEM is employed because the electric and magnetic fields are transverse with respect to the As long as the fields confineda net difference inpotential between conductors 1'4 and i5 permits part of the energy to be propagated in a different mode. Although this mode of propagation may a'c' count for only a small component of the total fiel'd it isa radiating component and, therefore, contributes to the losses of the transmission. line and permits undesirable coupling with other systems.

To overcome thediiference in potential between outer conductors 14: and 15, conductive members 19' may be added to short the outer conductors together as in Fig. 5. Since the conductors 14, 15 and 19 complete a boundary condition for wave guide propagation, for example TE mode, the parameters of this system must be so chosen that the cut-off frequency for wave guide operation is higher than the operating frequency of the line. The conductive elements 19 must be spaced less than a halfwave length-apart at the desired operating frequency. Since the parameter effects of the elements 19 are limited, they must also be spaced longitudinally 'less than a halfwave length apart to substantially confine the propagated energy Within the confines of the outer conductors.

The term half-wave length as employed herein refers to the wave length of the energy propagated by the line and varies with the dielectric constant of the insulating materials.

While there has been hereinbefore described What are at present considered preferred embodiments of the invention, it will be apparent that many and various changes and modifications may be made with respect to the embodiments 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:

1. A composite, high-frequency, electrical, transmission line, comprising: a pair of thin, elongated, parallel, planar, outer conductors; a thin, elongated, planar, inner conductor in parallel with and between said outer conductors, said inner conductor being of lesser width than said outer conductors; solid dielectric material wider than said inner conductor and disposed between said inner and outer conductors for securing said inner conductor in insulated, spaced relation with respect to said outer conductors; and conductive rods adjacent the narrow sides of said inner conductor extending from said outer conductors through said dielectric material for providing an electrical connection between said outer conductors, said rods being spaced longitudinally and transversely less than a half wavelength apart at the operating frequency to provide, thereby, a transmission line for propagating high-frequency, electromagnetic energy consisting substantially of a pure TEM mode.

2. A composite, high-frequency, electrical, transmission line, comprising: a pair of thin, elongated, parallel, planar, outer conductors; a thin, elongated, planar, inner conductor in parallel with and between said outer conductors, said inner conductor being of lesser width than said outer conductors; solid dielectric material wider than said inner conductor and disposed between said inner and outer conductors for securing said inner conductor in insulated spaced relation with respect to said outer conductor; and conductive rods aligned adjacent the narrow sides of said inner conductor extending from said outer conductors through said dielectric material for providing an electrical connection between said outer conductors, said rods being spaced longitudinally and transversely less than a half wavelength apart at the operating frequency to provide, thereby, a transmission line for propagating high-frequency, electromagnetic energy consisting substantially of a pure TEM mode.

3. A composite, high-frequency, electrical, transmission line, comprising: a pair of elongated, parallel, planar, outer conductors; a thin, elongated, planar, inner conductor disposed in parallel with and in insulated, spaced relation between said outer conductors, said inner conductor being narrower than said outer conductors, with said outer conductors extending transversely beyond the limits of said inner conductor; and conductive rods adja' cent the narrow sides of said inner conductor and extending from said outer conductors for providing an electrical connection between said outer conductors, said rods being spaced longitudinally and transversely less than a half wavelength apart at the operating frequency to provide, thereby, a transmission line for propagating highfrequency, electromagnetic energy consisting substantially of a pure TEM mode.

4. A composite, high-frequency, electrical, transmission line, comprising: a pair of elongated, parallel, planar dielectric insulators; a thin, elongated, planar, inner con ductor disposed in parallel with and between said insulators, said inner conductor being narrower than said in sulators; a pair of thin, elongated, parallel, planar, outer conductors afiixed to the outside surfaces of said insulators in insulated, spaced relation to and in parallel with said inner conductor, said outer conductors being wider than said inner conductor; and conductive rods extending from said outer conductors through said dielectric insulators adjacent the narrower sides of said inner conductor for providing an electrical connection between said outer conductors, said rods being spaced longitudinally and transversely less than a half wavelength apart at the operating frequency to provide, thereby, a transmission line for propagating high-frequency, electromagnetic energy consisting substantially of a pure TEM mode.

5. A composite, high-frequency, electrical, transmission line, comprising: a pair of elongated, parallel, planar, dielectric insulators; a thin, elongated, planar, inner conductor affixed to said insulators in parallel with and between said insulators, said inner conductor being narrower than said insulators, with said insulators extending transversely beyond the limits of said inner conductor; a pair of thin, elongated, parallel, planar, outer conductors affixed to the outside surfaces of said insulators in insulated, spaced relation to and in parallel with said inner conductor, said outer conductors being wider than and extending transversely beyond the limits of said inner conductor;' and conductive rods extending from said outer conductors through said dielectric insulators adjacent the narrower sides of said inner conductor for providing an electrical connection between said outer conductors, said rods being spaced longitudinally and transversely less than a half wavelength apart at the operating frequency to provide, thereby, a transmission line for prop agating high-frequency, electromagnetic energy consisting substantially of a pure TEM mode.

6. A composite, high-frequency, electrical, transmission line, comprising: a pair of elongated, parallel, planar, dielectric insulators; a thin, elongated, planar, inner conductor disposed in parallel with and between said insulators, said inner conductor being narrower than said insulators; a pair of thin, elongated, parallel, planar, outer conductors aflixed to the outside surfaces of said insulators in insulated, spaced relationto and in parallel with said inner conductor, said outer conductors being wider than said inner conductor; and conductive rods extending from said outer conductors through said dielectric insulators and aligned adjacent the narrower sides of said inner conductor for providing an electrical connection between said outer conductors, said rods being spaced longitudinally and transversely less than a half wavelength apart at the operating frequency to provide, thereby, a transmission line for propagating high-frequency, electromagnetic energy consisting substantially of a pure TEM mode.

References Cited in the file of this patent UNITED STATES PATENTS 2,231,602 Southworth Feb. 11, 1941 2,531,777 Marshall Nov. 28, 1950 2,575,571 Wheeler M Nov. 20, 1951 2,603,749 Kock July 15, 1952 OTHER REFERENCES Barrett: Etched Sheets Serve as Microwave Components, Electronics, June 1952, pages 11448.

US414165A 1954-03-04 1954-03-04 Transmission line Expired - Lifetime US2812501A (en)

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Cited By (58)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2913686A (en) * 1953-09-17 1959-11-17 Cutler Hammer Inc Strip transmission lines
US2926317A (en) * 1954-03-11 1960-02-23 Sanders Associates Inc Transmission line
US2943275A (en) * 1957-09-09 1960-06-28 Burt J Bittner Transformer for joining unbalanced to balanced transmission means
US3093805A (en) * 1957-07-26 1963-06-11 Osifchin Nicholas Coaxial transmission line
US3470469A (en) * 1963-08-07 1969-09-30 Sanders Associates Inc Slotted strip transmission line using probe to measure characteristics of the line
US3961296A (en) * 1975-03-06 1976-06-01 Motorola, Inc. Slotted strip-line
EP0022990A1 (en) * 1979-07-20 1981-01-28 Siemens Aktiengesellschaft Microstrip microwave balun
US4480240A (en) * 1982-09-30 1984-10-30 Gould Harry J Apparatus for separating rf ground plane from housing
US4513266A (en) * 1981-11-28 1985-04-23 Mitsubishi Denki Kabushiki Kaisha Microwave ground shield structure
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
US4631494A (en) * 1984-07-20 1986-12-23 Gould Harry J Conductive housing and biasing system for microwave integrated circuits
US4816618A (en) * 1983-12-29 1989-03-28 University Of California Microminiature coaxial cable and method of manufacture
FR2628572A1 (en) * 1988-03-11 1989-09-15 Thomson Csf Hyperfrequency transmission line on substrate - uses ribbons above and below substrate which are connected by metallised holes to form waveguide of constant characteristic impedance
US5057798A (en) * 1990-06-22 1991-10-15 Hughes Aircraft Company Space-saving two-sided microwave circuitry for hybrid circuits
US5349317A (en) * 1992-04-03 1994-09-20 Mitsubishi Denki Kabushiki Kaisha High frequency signal transmission tape
US5418504A (en) * 1993-12-09 1995-05-23 Nottenburg; Richard N. Transmission line
EP0675560A1 (en) * 1994-03-29 1995-10-04 Murata Manufacturing Co., Ltd. Low-pass filter
US5469130A (en) * 1992-11-27 1995-11-21 Murata Mfg. Co., Ltd. High frequency parallel strip line cable comprising connector part and connector provided on substrate for connecting with connector part thereof
US5486798A (en) * 1994-03-07 1996-01-23 At&T Ipm Corp. Multiplanar hybrid coupler
US5525953A (en) * 1993-04-28 1996-06-11 Murata Manufacturing Co., Ltd. Multi-plate type high frequency parallel strip-line cable comprising circuit device part integratedly formed in dielectric body of the cable
US5712607A (en) * 1996-04-12 1998-01-27 Dittmer; Timothy W. Air-dielectric stripline
US6081728A (en) * 1997-02-28 2000-06-27 Andrew Corporation Strip-type radiating cable for a radio communication system
WO2003086033A1 (en) * 2002-04-09 2003-10-16 Ppc Electronic Ag Printed circuit board and method for producing the same
US20050030124A1 (en) * 2003-06-30 2005-02-10 Okamoto Douglas Seiji Transmission line transition
US20050035832A1 (en) * 2000-06-09 2005-02-17 Nokia Corporation Waveguide in multilayer structures
US20070052503A1 (en) * 2005-09-08 2007-03-08 Van Quach Minh Stripline structure
WO2007104043A1 (en) * 2006-03-09 2007-09-13 Zih Corp. Rfid uhf stripline coupler
US20070262828A1 (en) * 2006-05-12 2007-11-15 Denso Corporation Dielectric substrate for wave guide tube and transmission line transition using the same
US20080074269A1 (en) * 2006-09-21 2008-03-27 Zih Corp. Rfid system and associated antenna-coupler
US20080117027A1 (en) * 2006-11-16 2008-05-22 Zih Corporation Systems, methods, and associated rfid antennas for processing a plurality of transponders
US20080238606A1 (en) * 2007-03-30 2008-10-02 Zih Corp. Near-Field Miniature Coupler
US20080298822A1 (en) * 2007-05-30 2008-12-04 Zih Corp. System for processing media units and an associated media roll
US20090096692A1 (en) * 2005-11-14 2009-04-16 Eduardo Motta Cruz Flat Antenna System With a Direct Waveguide Access
US20090152353A1 (en) * 2007-12-18 2009-06-18 Zih Corp. Rfid near-field antenna and associated systems
US20090162123A1 (en) * 2007-12-19 2009-06-25 Zih Corp. Platen incorporating an rfid coupling device
US20100296252A1 (en) * 2007-03-20 2010-11-25 Rollin Jean-Marc Integrated electronic components and methods of formation thereof
US20110115580A1 (en) * 2009-03-03 2011-05-19 Bae Systems Information And Electronic Systems Integration Inc. Two level matrix for embodying disparate micro-machined coaxial components
US20110123783A1 (en) * 2009-11-23 2011-05-26 David Sherrer Multilayer build processses and devices thereof
US20110136554A1 (en) * 2009-12-09 2011-06-09 Joshua Kwan Ho Wong Mobile communication device with rf-capable flex cable
US20110132641A1 (en) * 2009-12-09 2011-06-09 Joshua Kwan Ho Wong Flexible cable and methods of manufacturing same
EP2334156A1 (en) * 2009-12-09 2011-06-15 Research In Motion Limited Flexible cable and methods of manufacturing same
US20110181377A1 (en) * 2010-01-22 2011-07-28 Kenneth Vanhille Thermal management
US20110181376A1 (en) * 2010-01-22 2011-07-28 Kenneth Vanhille Waveguide structures and processes thereof
US20110210807A1 (en) * 2003-03-04 2011-09-01 Sherrer David W Coaxial waveguide microstructures and methods of formation thereof
JP2012529226A (en) * 2009-06-04 2012-11-15 インターナショナル・ビジネス・マシーンズ・コーポレーションInternational Business Maschines Corporation Vertical coplanar waveguide with tunable characteristic impedance, its design structure, and its fabrication method
US8542079B2 (en) 2007-03-20 2013-09-24 Nuvotronics, Llc Coaxial transmission line microstructure including an enlarged coaxial structure for transitioning to an electrical connector
US8814601B1 (en) 2011-06-06 2014-08-26 Nuvotronics, Llc Batch fabricated microconnectors
US8866300B1 (en) 2011-06-05 2014-10-21 Nuvotronics, Llc Devices and methods for solder flow control in three-dimensional microstructures
US8933769B2 (en) 2006-12-30 2015-01-13 Nuvotronics, Llc Three-dimensional microstructures having a re-entrant shape aperture and methods of formation
US9306255B1 (en) 2013-03-15 2016-04-05 Nuvotronics, Inc. Microstructure including microstructural waveguide elements and/or IC chips that are mechanically interconnected to each other
US9306254B1 (en) 2013-03-15 2016-04-05 Nuvotronics, Inc. Substrate-free mechanical interconnection of electronic sub-systems using a spring configuration
US9325044B2 (en) 2013-01-26 2016-04-26 Nuvotronics, Inc. Multi-layer digital elliptic filter and method
US9993982B2 (en) 2011-07-13 2018-06-12 Nuvotronics, Inc. Methods of fabricating electronic and mechanical structures
US10310009B2 (en) 2014-01-17 2019-06-04 Nuvotronics, Inc Wafer scale test interface unit and contactors
US10319654B1 (en) 2017-12-01 2019-06-11 Cubic Corporation Integrated chip scale packages
WO2019235558A1 (en) * 2018-06-07 2019-12-12 株式会社村田製作所 Multilayer substrate, electronic device, and method for producing multilayer substrate
US10511073B2 (en) 2014-12-03 2019-12-17 Cubic Corporation Systems and methods for manufacturing stacked circuits and transmission lines

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US2231602A (en) * 1937-03-20 1941-02-11 American Telephone & Telegraph Multiplex high frequency signaling
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US2603749A (en) * 1946-04-08 1952-07-15 Bell Telephone Labor Inc Directive antenna system
US2575571A (en) * 1947-05-13 1951-11-20 Hazeltine Research Inc Wave-signal directional coupler

Cited By (95)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2913686A (en) * 1953-09-17 1959-11-17 Cutler Hammer Inc Strip transmission lines
US2926317A (en) * 1954-03-11 1960-02-23 Sanders Associates Inc Transmission line
US3093805A (en) * 1957-07-26 1963-06-11 Osifchin Nicholas Coaxial transmission line
US2943275A (en) * 1957-09-09 1960-06-28 Burt J Bittner Transformer for joining unbalanced to balanced transmission means
US3470469A (en) * 1963-08-07 1969-09-30 Sanders Associates Inc Slotted strip transmission line using probe to measure characteristics of the line
US3961296A (en) * 1975-03-06 1976-06-01 Motorola, Inc. Slotted strip-line
EP0022990A1 (en) * 1979-07-20 1981-01-28 Siemens Aktiengesellschaft Microstrip microwave balun
US4513266A (en) * 1981-11-28 1985-04-23 Mitsubishi Denki Kabushiki Kaisha Microwave ground shield structure
US4480240A (en) * 1982-09-30 1984-10-30 Gould Harry J Apparatus for separating rf ground plane from housing
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
US4631494A (en) * 1984-07-20 1986-12-23 Gould Harry J Conductive housing and biasing system for microwave integrated circuits
FR2628572A1 (en) * 1988-03-11 1989-09-15 Thomson Csf Hyperfrequency transmission line on substrate - uses ribbons above and below substrate which are connected by metallised holes to form waveguide of constant characteristic impedance
US5057798A (en) * 1990-06-22 1991-10-15 Hughes Aircraft Company Space-saving two-sided microwave circuitry for hybrid circuits
US5349317A (en) * 1992-04-03 1994-09-20 Mitsubishi Denki Kabushiki Kaisha High frequency signal transmission tape
US5469130A (en) * 1992-11-27 1995-11-21 Murata Mfg. Co., Ltd. High frequency parallel strip line cable comprising connector part and connector provided on substrate for connecting with connector part thereof
US5525953A (en) * 1993-04-28 1996-06-11 Murata Manufacturing Co., Ltd. Multi-plate type high frequency parallel strip-line cable comprising circuit device part integratedly formed in dielectric body of the cable
US5418504A (en) * 1993-12-09 1995-05-23 Nottenburg; Richard N. Transmission line
US5486798A (en) * 1994-03-07 1996-01-23 At&T Ipm Corp. Multiplanar hybrid coupler
EP0675560A1 (en) * 1994-03-29 1995-10-04 Murata Manufacturing Co., Ltd. Low-pass filter
US5668511A (en) * 1994-03-29 1997-09-16 Murata Manufacturing Co., Ltd. Low-pass filter
US5712607A (en) * 1996-04-12 1998-01-27 Dittmer; Timothy W. Air-dielectric stripline
US6081728A (en) * 1997-02-28 2000-06-27 Andrew Corporation Strip-type radiating cable for a radio communication system
US20050035832A1 (en) * 2000-06-09 2005-02-17 Nokia Corporation Waveguide in multilayer structures
US7053735B2 (en) * 2000-06-09 2006-05-30 Nokia Corporation Waveguide in multilayer structures and resonator formed therefrom
WO2003086033A1 (en) * 2002-04-09 2003-10-16 Ppc Electronic Ag Printed circuit board and method for producing the same
US8742874B2 (en) 2003-03-04 2014-06-03 Nuvotronics, Llc Coaxial waveguide microstructures having an active device and methods of formation thereof
US9312589B2 (en) 2003-03-04 2016-04-12 Nuvotronics, Inc. Coaxial waveguide microstructure having center and outer conductors configured in a rectangular cross-section
US10074885B2 (en) 2003-03-04 2018-09-11 Nuvotronics, Inc Coaxial waveguide microstructures having conductors formed by plural conductive layers
US20110210807A1 (en) * 2003-03-04 2011-09-01 Sherrer David W Coaxial waveguide microstructures and methods of formation thereof
US7145414B2 (en) 2003-06-30 2006-12-05 Endwave Corporation Transmission line orientation transition
US20050030124A1 (en) * 2003-06-30 2005-02-10 Okamoto Douglas Seiji Transmission line transition
US7224249B2 (en) * 2005-09-08 2007-05-29 Avago Technologies General Ip (Singapore) Pte. Ltd. Stripline structure with multiple ground vias separated by no more than 100 mil
US20070052503A1 (en) * 2005-09-08 2007-03-08 Van Quach Minh Stripline structure
US20090096692A1 (en) * 2005-11-14 2009-04-16 Eduardo Motta Cruz Flat Antenna System With a Direct Waveguide Access
US8358246B2 (en) 2006-03-09 2013-01-22 Zih Corp. RFID UHF stripline antenna-coupler
US7586410B2 (en) * 2006-03-09 2009-09-08 Zih Corp. RFID UHF stripline coupler
US20070216591A1 (en) * 2006-03-09 2007-09-20 Zih Corp., RFID UHF stripline coupler
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