EP2092594A1 - Koaxial-koplanar-mikrowellen-übergang - Google Patents
Koaxial-koplanar-mikrowellen-übergangInfo
- Publication number
- EP2092594A1 EP2092594A1 EP07819595A EP07819595A EP2092594A1 EP 2092594 A1 EP2092594 A1 EP 2092594A1 EP 07819595 A EP07819595 A EP 07819595A EP 07819595 A EP07819595 A EP 07819595A EP 2092594 A1 EP2092594 A1 EP 2092594A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- transition
- conductor
- microwave
- film
- coplanar
- 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.)
- Granted
Links
Classifications
-
- 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
- H01P5/085—Coaxial-line/strip-line transitions
Definitions
- the invention relates to a microwave transition from a coaxial line to a coplanar line system.
- Microwave circuits are today often formed in planar waveguide technology. In order to connect these integrated microwave circuits with other functional units and devices, it is necessary to revert to coaxial lines. For this purpose, corresponding microwave transitions are required, which should be very broadband for many applications and should have the lowest possible reflection and transmission loss.
- connection between the inner conductor of the coaxial line and the center conductor of the coplanar line system via a one or two sides metallized film piece of elastic takes place
- Insulating material with a coaxial line system with a planar inner conductor connecting to the round inner conductor of the coaxial line, which is followed by a transition section to the coplanar line system.
- a continuous transition of the coaxial field is achieved in a coplanar field image and thus a reflection-free connection of a coplanar line system to a coaxial line from which the connection to other microwave ovens can be made via suitable coaxial and coaxial cable.
- the actual transition section between coaxial with planar inner conductor and the Coplanar line system as well is formed directly on the metallized film and the edges of the film in this transition region are fixed directly on the outer conductor housing. In this case, heat can flow away via the planar inner conductor to the outer conductor and heating of the coplanar line system is avoided.
- An inventive transition is also very inexpensive to produce, he has low manufacturing tolerances, the metallization on the film can be applied by photolithographic processes in the desired shape and the contours of the plastic film can be made very accurately by laser cutting. Any height tolerances of the interconnected mechanical components can also be compensated by the flexible film.
- FIG. 1 shows the longitudinal section of a microwave transition according to the invention, namely for the transition from a coaxial line to a coplanar line system of a larger substrate
- Fig. 3 shows a longitudinal section of another
- FIGS. 2 and 4 show various sections of FIGS. 2 and 4,
- FIGS. 2 and 4 show the electric field images associated with these sections according to FIGS. 2 and 4,
- Fig. 7 shows the direct attachment of a small microwave chip on the film shown in Figs. 3 and 4 and
- FIG. 8 shows the type of installation for optimum heat dissipation from this chip according to FIG. 7 to the surrounding outer conductor housing.
- FIG. 1 shows the longitudinal section of a first exemplary embodiment of a microwave transition between a coaxial line 1 and a coplanar line system formed on the upper side of a substrate 2.
- the circular in cross-section inner conductor 4 of the coaxial line 1 is fixed concentrically in a cross-sectionally circular longitudinal bore 5 of an outer conductor housing 6 via insulating supports 7 both axially and transversely.
- the supports 7 are designed in a known manner so that the additional capacitances that arise due to the introduced dielectric of the supports are compensated by corresponding inductors on the inner conductor, which are realized by reducing the inner conductor diameter.
- the dimensions of the coaxial line 1 are chosen so that a line resistance of, for example, 50 ohms results and the cutoff frequency of the first higher Mode is greater than the maximum operating frequency. At the outer end of this
- this is flattened on one side to the middle and on this flattening 8 of the circular inner conductor 4, a short piece of film 9 made of an elastic insulating material, for example, polyimide placed on its the flattening 8 facing underside with a thin Gold layer 10 is coated.
- the width of this planar inner conductor 9 of the Koaxial effetsabitess 11 within the bore 5 is selected so that the basic mode again a line resistance of z. B. 50 ohms.
- the axial length of the flattening 8 determines the field compensation in this area.
- the transition from the planar inner conductor 9 of the coaxial line 11 to the coplanar line system 3 takes place in the
- Embodiment of FIGS. 1 and 2 directly over a coplanar transition section 16 on the top of the substrate 2.
- Another way to attach the film piece 9 is z.
- Example is to provide the inner conductor at the end with a slot into which the film piece is inserted.
- the formed in Fig. 1 and 2 on the substrate 2 transition section 16 consists of a central conductor section 12, which in a suitable form z.
- B S-shaped, trapezoidal or stepped tapered from the width of the planar inner conductor 9 to the width of the central conductor 13 of the formed on the substrate 2 coplanar line system 3.
- the end of the applied on the underside of the film piece 9 metal layer 10 is placed and thus electrically connected.
- ground surfaces 14, 15 of the coplanar Schmattssytems also in a suitable form, for example, again S-, trapezoidal or stepped brought to this central conductor section 12, so that between the central conductor section 12 and these ground surfaces 14, 15 in width funnel-shaped gradually tapering gaps arise, which eventually pass in narrow gaps between the center conductor 13 and the lateral ground surfaces 14, 15 of the coplanar line system 3.
- the exact shape of the central conductor section 12 and the ground surfaces 14, 15 brought from the outside must be specially optimized depending on the application.
- the attachment of the metallized on the bottom piece of film on the flattening 8 and at the overlap with the central conductor part 12 on the substrate 2, for example, by welding or gluing, preferably on the metallized side 10 of the film 9 corresponding metal bumps are provided by the by means of a thermocompression method, a mechanical and galvanic connection between the metallized
- sections AA, CC, DD and FF shown in FIG. 6 show that the coaxial field pattern from section AA is only slightly deformed during the transition to section CC.
- the transition from section CC to section DD is also only a slight change of Field image.
- the field is increasingly concentrated around the center conductor 12 of the coplanar line system 3. This transition is only a small disturbance, so that overall there is a very low-reflection transition from a coaxial field to a coplanar field.
- the substrate 2 is inserted into a slot 17 of the housing 6, so that the outer conductor of the Koaxial Arthurssystems 11 ', 11 continues beyond the transition region 16.
- the upper and lower outer conductor housing sections which are separated by the substrate 2 and the slot 17 must be galvanically connected to one another, at least in the region of the transition section 16, by corresponding plated-through holes in the substrate so that the outer conductor remains closed in the transitional region 16, which is required for a continuous field transition.
- FIGS. 3 to 5 show a further embodiment of the invention, in which the actual transition region 16 between the planar inner conductor 9, 10 and coplanar line system 3 is formed on an extension of the film 9.
- the representations of FIGS. 3 and 4 are rotated relative to those of FIGS. 1 and 2 by 180 ° about the longitudinal axis.
- the narrow piece of film 9 with its applied in this case on the top metal liner 10 widened in the area 16 on more than the inner diameter of the outer conductor bore 5, the edges of this widened film piece are in longitudinal slots 28 of
- External conductor housing 6 is inserted, as shown by the section EE of FIG. 5.
- the slots are formed by corresponding longitudinal grooves.
- the metal lamination 10 on the upper side of the film 9 makes galvanic contact with the outer conductor housing 6 in these longitudinal slots.
- the planar inner conductor 9, 10 narrows in the transitional region 16 from its original width to the width of the center conductor 20. At the same time, this becomes Narrowing of the planar inner conductor 9, 10 down to the width of the
- Center conductor 20 the ground surfaces 21 and 22 of the coplanar line system according brought to the inner conductor. They are separated from the center conductor 20 only by gaps, so that a coplanar line system 3 is provided, preferably again with 50 ohm line resistance.
- FIG. 5 shows the associated sectional images along the section lines drawn in FIG. 4.
- Fig. 6 it is seen that starting from the coaxial line 1 (section AA) in the transition to the planar inner conductor 10 (section CC) only a slight change in the field image occurs.
- section DD the transition section 16 (section DD) up to the coplanar line system 3 on the film (section DD).
- the field is increasingly concentrated around the center conductor 12 of the coplanar line system 3.
- a possibility for the direct transition from a coaxial line 1 to a semiconductor chip 23 is also shown, which has a corresponding coplanar line system on its upper side.
- the dimensions of the semiconductor chip 23 may be smaller or larger than the cross section of the longitudinal bore 5 of the outer conductor housing 6.
- the chip 23 is installed directly in the outer conductor housing 6 and connected to the center conductor 20 of the transition section on the film, as that 180 ° shown rotated section GG in Fig. 5 shows.
- the chip 23 is mechanically held on corresponding lateral projections 24 of the outer conductor housing 6 and its coplanar line sections are again connected by bumps to the coplanar line section 3, for example.
- FIGS. 7 and 8 A further possibility for the direct attachment of such a semiconductor chip 23 within the outer conductor housing 6 is shown in FIGS. 7 and 8.
- the film greatly widened in the transition section 16, the edges of which are clamped in this area in the outer conductor housing G (slots 17), settles in a foil section 25 fort, which is not clamped in the housing 6, so that height tolerances of the components or thermal stresses are compensated.
- a recess 26 Immediately above the attachment point of the chip 23 to the film, this is provided with a recess 26, so that the running on the top of the chip 23 traces 29 are exposed.
- a series of bumps 27 is provided for a thermocompression on the film, the chip is placed as shown in FIG. 7 from below on the film and fixed there over the bumps.
- the compound can be reinforced by glue.
- FIG. 8 shows in detail how a chip 23 placed directly on the film can be used with the best possible thermal conduction to the surrounding housing 6.
- the figures each show greatly enlarged representations of the microwave transition according to the invention.
- a microwave transition in the GHz range for example
- Coaxial coupling is mounted, is a total of only about 8mm long, as the actual film section in Fig. 4.
- the film preferably has a thickness of only about 50 microns, the applied thereon gold plating, which is applied in the embodiment only on one side, but under certain circumstances can be applied on both sides, only about 2 microns.
Landscapes
- Coupling Device And Connection With Printed Circuit (AREA)
- Waveguide Connection Structure (AREA)
- Waveguides (AREA)
- Non-Reversible Transmitting Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102006055162 | 2006-11-22 | ||
| DE102007013968A DE102007013968A1 (de) | 2006-11-22 | 2007-03-23 | Koaxial-Koplanar-Mikrowellen-Übergang |
| PCT/EP2007/009574 WO2008061623A1 (de) | 2006-11-22 | 2007-11-05 | Koaxial-koplanar-mikrowellen-übergang |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2092594A1 true EP2092594A1 (de) | 2009-08-26 |
| EP2092594B1 EP2092594B1 (de) | 2013-04-03 |
Family
ID=38924337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP07819595A Active EP2092594B1 (de) | 2006-11-22 | 2007-11-05 | Koaxial-koplanar-mikrowellen-übergang |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US8143975B2 (de) |
| EP (1) | EP2092594B1 (de) |
| DE (1) | DE102007013968A1 (de) |
| WO (1) | WO2008061623A1 (de) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008026765A1 (de) * | 2008-04-16 | 2009-10-22 | Rohde & Schwarz Gmbh & Co. Kg | Mikrowellen-Baugruppe |
| DE102010035191A1 (de) | 2010-08-24 | 2012-03-01 | Rohde & Schwarz Gmbh & Co. Kg | Kalibriereinrichtung für einen Netzwerkanalysator |
| DE102014214023A1 (de) * | 2014-05-16 | 2015-11-19 | Rohde & Schwarz Gmbh & Co. Kg | Leitungssystem mit geschlossenzelligem Hartschaum |
| US9666928B1 (en) * | 2015-10-30 | 2017-05-30 | Christos Tsironis | High power slide screw tuners |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3686624A (en) * | 1969-12-15 | 1972-08-22 | Rca Corp | Coax line to strip line end launcher |
| US5404117A (en) * | 1993-10-01 | 1995-04-04 | Hewlett-Packard Company | Connector for strip-type transmission line to coaxial cable |
| US5570068A (en) * | 1995-05-26 | 1996-10-29 | Hughes Aircraft Company | Coaxial-to-coplanar-waveguide transmission line connector using integrated slabline transition |
| US5897384A (en) * | 1997-10-24 | 1999-04-27 | The Whitaker Corporation | Board mountable coaxial connector |
| GB2378045A (en) * | 2001-07-25 | 2003-01-29 | Marconi Caswell Ltd | Electrical connection with flexible coplanar transmission line |
| US20030099098A1 (en) * | 2001-11-23 | 2003-05-29 | Jose Schutt-Aine | RF connector with chip carrier and coaxial to coplanar transition |
| US6774742B1 (en) * | 2002-05-23 | 2004-08-10 | Applied Microcircuits Corporation | System and method for interfacing a coaxial connector to a coplanar waveguide substrate |
| US20040038587A1 (en) * | 2002-08-23 | 2004-02-26 | Yeung Hubert K. | High frequency coaxial connector for microcircuit packaging |
| DE10313590B4 (de) * | 2003-03-26 | 2008-07-24 | Rohde & Schwarz Gmbh & Co. Kg | Verbindung zwischen einem koaxialen und einem koplanaren Streifenleitungssystem |
-
2007
- 2007-03-23 DE DE102007013968A patent/DE102007013968A1/de not_active Withdrawn
- 2007-11-05 EP EP07819595A patent/EP2092594B1/de active Active
- 2007-11-05 US US12/515,532 patent/US8143975B2/en active Active
- 2007-11-05 WO PCT/EP2007/009574 patent/WO2008061623A1/de not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2008061623A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| US20100141361A1 (en) | 2010-06-10 |
| US8143975B2 (en) | 2012-03-27 |
| EP2092594B1 (de) | 2013-04-03 |
| WO2008061623A8 (de) | 2008-09-12 |
| WO2008061623A1 (de) | 2008-05-29 |
| DE102007013968A1 (de) | 2008-05-29 |
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