EP1741158B1 - Impedance transformer - Google Patents

Impedance transformer Download PDF

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Publication number
EP1741158B1
EP1741158B1 EP05738431A EP05738431A EP1741158B1 EP 1741158 B1 EP1741158 B1 EP 1741158B1 EP 05738431 A EP05738431 A EP 05738431A EP 05738431 A EP05738431 A EP 05738431A EP 1741158 B1 EP1741158 B1 EP 1741158B1
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EP
European Patent Office
Prior art keywords
web
inner conductor
outer conductor
impedance
conductor
Prior art date
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Expired - Fee Related
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EP05738431A
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German (de)
French (fr)
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EP1741158A1 (en
Inventor
Thomas Haunberger
Wolfgang Heibler
Stefan Dandlberger
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Kathrein SE
Original Assignee
Kathrein Werke KG
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Publication of EP1741158A1 publication Critical patent/EP1741158A1/en
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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
    • H01P5/02—Coupling devices of the waveguide type with invariable factor of coupling

Definitions

  • the invention relates to an impedance converter device according to the preamble of claim 1.
  • Impedance converters are nowadays used in particular in antenna arrangements for transforming impedances.
  • the impedance transducers serve to separate from the individual radiator elements or antenna components, such.
  • Phase shifters, filters, bandpasses, resulting broadband impedance match a common system impedance, which is in the mobile sector at 50 ohms.
  • Impedance converters are known from the prior art in which an impedance transformation is carried out by means of a ⁇ / 4 transformation by interposing coaxial cables between terminals in the antenna arrangement which have a length which corresponds to a quarter of the wavelength of the radio frequency with which the antenna arrangement is operated. It proves to be disadvantageous that the interposition of coaxial cables a variety of soldering points at the ends the coaxial cable must be attached, so that the production of such impedance converter is expensive and also subject to high tolerances because of the variety of parts. Likewise, tuning screws for changing the impedance in coaxial elements are known from the prior art. This type of impedance conversion is relatively expensive.
  • impedance transformations are carried out by means of impedance transformers in the form of strip conductors on printed circuit boards.
  • impedance transformers in the form of strip conductors on printed circuit boards.
  • An impedance coupler is also out of the EP 0 910 135 A2 known. It is a test apparatus in which two signal paths should be connected with as little reflection as possible. That is, it should be a simple and re-releasable connection possible, which includes a compensation of the contact point.
  • an outer conductor housing and a dielectric inside a separate inner conductor connecting pieces which comprises an axial AufNFOSEung for contacting the inner conductor of the coaxial conductor to be connected.
  • This innermost inner conductor connector is designed in the manner of a short bar and includes two semi-cylindrical receptacles, which are separated by a short web.
  • the coaxial cables are only clamped. Adjustments with respect to this connection device for changing an impedance conversion are not provided at this point.
  • a hollow waveguide impedance converter is also still out of the US 2,531,437 to be known as known.
  • the object of the invention is therefore to provide an impedance wall lervoriques, which is inexpensive to produce, is suitable for high-frequency power and allows a simple way to tune the impedance.
  • the impedance transformer device is characterized by a special shape of an outer conductor, an inner conductor and an intervening dielectric.
  • the outer conductor of the device comprises a base, which is bounded by one or more side walls, whereby an outer conductor housing is formed with an inner space and an opening opposite the base.
  • an outer conductor housing is formed with an inner space and an opening opposite the base.
  • the inner conductor comprises at least a first and a second web-shaped section, each having a land bottom, wherein the first web-shaped section transverse to the longitudinal direction comprises two laterally offset and extending from the land bottom towards the opening of the outer conductor housing extending web walls.
  • the design of the outer conductor as an open housing allows access to the inner conductor, in particular to the web walls of the web-shaped Abschnit te. These two web walls can by appropriate Tool can be adjusted angularly or in parallel with each other, which easily an operator can tune the impedance without intermodulation problems occur or the intermodulation properties are deteriorated.
  • the opening can be closed by a suitable closure device.
  • the housing on the side, which is opposite to the base is not integrally formed with all side walls of the housing, so that in the impedance converter always (possibly even closed) opening can be located.
  • a further advantage of the impedance converter according to the invention is that the outer conductor housing can be used universally and only the easily accessible inner conductor has to be exchanged to change the transformation properties of the impedance converter. Due to the height achieved by the outer conductor housing, there is no unwanted radiation of the transducer. The converter can also be used for very high RF power.
  • the impedance converter extends iw in a longitudinal direction between at least two opposite connection points. Furthermore, at least one web bottom of a web-shaped inner conductor section at least two web walls are assigned, extending in the direction of Opening the outer conductor housing in particular from edges of the web floor extend.
  • the web walls associated with a web floor are in particular parallel to one another. In one embodiment, the web walls associated with a web floor run together or in a sectional view along a plane parallel to the base surface of the outer conductor in the longitudinal direction of the impedance converter. Alternatively, the web walls associated with a web floor are parallel to one another. Furthermore, the web walls associated with a web floor can essentially be perpendicular to the web floor. Alternatively, the web walls associated with a web floor run apart or together in a sectional view along a plane perpendicular to the longitudinal direction of the impedance converter in the direction of the opening of the outer conductor housing.
  • the outer conductor comprises a stamped, one-piece metal sheet with bent-over side walls.
  • the inner conductor is preferably also a stamped, one-piece metal sheet with bent web walls.
  • the dielectric is a component with a receptacle, the component being used in the interior of the outer conductor housing and the inner conductor being arranged in the receptacle of the component is.
  • a separate component in a simple manner.
  • the component is in this case preferably formed in one piece.
  • the component is held in a preferred variant by adhesion, in particular by a clamp, and / or by positive engagement and / or by material bond in the outer conductor housing.
  • the inner conductor can be held in the receptacle of the dielectric by frictional connection, in particular by a clamping, and / or by positive locking and / or by material connection.
  • frictional connection in particular by a clamping, and / or by positive locking and / or by material connection.
  • the inner conductor has at its ends end sections with at least one or more end surfaces which extend in the direction of the opening of the outer conductor housing. With the help of these end portions, a fixation of the position of the inner conductor in the outer conductor housing is made possible.
  • one or more corners of the receptacle are preferably rounded and receive edges of the end portions of the inner conductor.
  • the inner conductor has at least one first web-shaped section for impedance transformation.
  • the first web-shaped section preferably has a length which is 1/4 of the wavelength of a radio frequency which is used for mobile radio transmission, in particular a radio frequency in a GSM network and / or UMTS network.
  • the length is preferably matched to the center frequency to be transmitted.
  • the inner conductor has at least one second web-shaped section for length adjustment of the inner conductor.
  • the second web-shaped section is achieved that the length of the inner conductor, regardless of the high frequencies used, is always the same, so that the inner conductor can always be used in an identically constructed outer conductor housing.
  • connection points in the outer conductor and in the inner conductor are provided, which preferably comprise openings at the ends of the outer conductor or of the inner conductor.
  • Each opening of the outer conductor is preferably aligned with an opening of the inner conductor, wherein the aligned openings are each interconnected by an opening in the dielectric.
  • the openings of the outer conductor and the inner conductor are preferably used for receiving and subsequent soldering of coaxial cables, wherein the openings of the outer conductor for receiving a Koaxialau touchleiters and the openings of the inner conductor for receiving a Koaxialinnenleiters are used.
  • the openings of the dielectric are preferably each received in recesses, which serve in particular for receiving a arranged between a Koaxialau hybridleiter and a Koaxialinnenleiter insulation.
  • the openings of the outer conductor may comprise at least one shoulder, which serves in particular for abutment for one end of a Koaxialau communleiters.
  • coaxial cables are soldered by means of solder paste and / or integrated solder preforms at the openings of the outer conductor and the inner conductor. This allows an automated and cost-effective Anlötung the coaxial cable to the impedance converter.
  • the dielectric used in the impedance converter according to the invention may in one embodiment of the invention comprise air, which means that the inner and outer conductors of the impedance converter are spaced apart by additional spacing means.
  • the inner conductor is fan-shaped with a plurality of bar-shaped sections arranged in parallel.
  • the device can be interconnected with several different systems. To fix the web-shaped sections, these are each arranged in a recess in the dielectric.
  • FIG. 1 and FIG. 2 show perspective views of a first embodiment of an impedance converter according to the invention.
  • the transducer comprises an outer conductor in the form of an outer elongate metal housing 1, the housing being open at the top and being made of a stamped sheet metal.
  • the housing is substantially rectangular in shape and has a (not aus FIG. 1 and FIG. 2 apparent) base 1a and side walls 1b, 1c, 1d and 1e on.
  • the outer conductor 1 is preferably a sheet metal part, the side walls are upwardly bent portions of the sheet metal part. The edges of the individual side walls are hereby separated by narrow spaces Z from each other.
  • the dielectric 3 can be clamped by adhesion over the curved side walls.
  • the dielectric is also open at the top and in its interior, an inner conductor 2 is inserted.
  • This inner conductor has end sections 2c and 2d, which respectively comprise side walls 24, 25, 26 and 27, 28, 29. The end sections are inserted over rounded corners 3a, 3b, 3c and 3d in the dielectric 3.
  • the inner conductor 2 has a length so as to be clamped in the inner space of the dielectric 3 via the end portions 2c and 2d.
  • the inner conductor comprises between the end portions 2c and 2d two interconnected web-shaped sections 2a and 2b.
  • the first web-shaped section 2a comprises a web floor 21 and two web walls 22 and 23 extending vertically upwards.
  • the second web-shaped section 2b comprises a (not aus FIGS.
  • the inner conductor is preferably formed as a one-piece metal sheet, wherein in the metal sheet, first the shape of the side walls of the end portion and the web-shaped portions is punched out and then the side walls and web walls are bent upwards.
  • stamped sheets for the outer conductor and the inner conductor ensures a low-cost and simple production of the impedance converter.
  • the transformation impedance can be adjusted.
  • the first web-shaped portion 2a serves to transform the impedance when the impedance transformer is soldered in an antenna arrangement between coaxial cables.
  • the length of the first web-shaped section 2a is 1/4 of a wavelength ⁇ , whereby a ⁇ / 4 transformation is performed, where ⁇ corresponds to the wavelength of the high frequency with which the corresponding antenna arrangement is operated. These are preferably the usual mobile radio frequencies, such as 900 or 1800 MHz in GSM networks.
  • the second web-shaped section 2b of the impedance converter is primarily used for length correction. That is to say, the length of the second web-shaped section is always selected as a function of the length of the first web-shaped section and the overall length of the impedance converter so that the inner conductor is always fixed in the same layer in the dielectric.
  • the inner conductor 2 has the great advantage that its impedance can be adjusted or changed by bending the web walls of the first web-shaped section 2a. This is particularly advantageous in the production of the impedance converter, since at the end of the manufacturing process any tolerances in the impedance by bending the web walls 22 and 23 can be compensated.
  • the second web-shaped section can also be designed such that it likewise influences the impedance, so that the impedance of the transducer can also be changed by bending the web walls 22 'or 23'.
  • the outer conductor 1 of the impedance converter has a cylindrical opening 101 in the side surface 1e and two interconnected cylindrical openings 102 and 103 in the side surface 1c. These openings are connected via respective cylindrical openings 301, 302 and 303 in the dielectric 3 with smaller cylindrical openings 201, 202 and 203 in the end portions 2c and 2d, respectively.
  • the openings in the outer conductor and in the inner conductor dierien for connection to a coaxial cable, wherein the openings of the outer conductor for receiving a Koaxialau touchleiters and the corresponding openings in the inner conductor for receiving the corresponding Koaxialinnenleiters are used. To attach the coaxial conductors of the cable, the conductors are soldered to the openings.
  • solderings for the coaxial outer conductors and, in the end sections 2c and 2d of the inner conductor 2, solderings for the coaxial inner conductor are applied to the outer sides of the side walls 1c and 1e of the housing 1.
  • the impedance converter according to the invention requires a smaller number of solder joints.
  • the height of the impedance converter avoids emissions which occur, for example, in the case of impedance transformers in the form of strip conductors on printed circuit boards.
  • FIG. 3 shows a plan view of the impedance converter FIG. 1 respectively.
  • FIG. 2 , Out FIG. 3 is particularly apparent that the web bottom 21 of the first web-shaped portion 2a is wider than the web bottom 21 'of the second web-shaped portion 2b. Furthermore, the length of the second web-shaped section is less than the length of the first web-shaped section. Due to the reduced design of the second web-shaped section is achieved that this section has little or no influence on the impedance of the transducer.
  • the web walls 22 and 23 as well as 22 'and 23' of the web-shaped sections are easily accessible from above, so that an operator can adjust or tune the impedance if necessary by bending the web walls.
  • FIG. 4 is a sectional view taken along the line II of FIG. 3 shown with dashed lines the position of coaxial cables is indicated, which are connected to the impedance converter. Furthermore, the cross section of the outer conductor housing 1 is indicated with a simple hatching, whereas the cross section of the dielectric 3 is shown with a double hatching. From Figure '4, in particular, the diameter arise the openings 101 and 103 in the outer conductor housing, the openings 301 and 303 in the dielectric and the openings 201 and 203 in the inner conductor housing. Of the openings 103, 203 and 303, the opening 103 has the largest diameter, wherein it serves to receive a Koaxialau dateleiters 51 of a coaxial cable 5.
  • the inserted coaxial outer conductor strikes against a circumferential shoulder S in the opening 103.
  • the opening 303 has a smaller diameter than the opening 103 and serves to receive an insulation 53 of the coaxial cable 5.
  • the opening 203 has the smallest diameter and serves to receive the Koaxialinnenleiters 52 of the coaxial cable 5.
  • the Koaxialau wentleiter 51 via a soldering the outside of the side wall 1c attached.
  • the Koaxialinnenleiter 52 is soldered to the inside of the side wall 25.
  • the openings 101, 201 and 301 in the region of the side wall 1e are designed for a larger or low-steam coaxial cable 5 '.
  • the opening 101 Analogous to the opening 103, the opening 101 has a corresponding shoulder S 'against which an end of a coaxial outer conductor 51' abuts.
  • the opening 301 is smaller than the opening 101 and it is arranged in a cylindrical recess A in the dielectric 3, wherein the recess is selected such that the insulation 53 'of the coaxial cable 5' can be accommodated therein.
  • the size of the opening 201 in the inner conductor 2 substantially corresponds to the size of the opening 301 in the dielectric 3, wherein the diameter of the openings is selected such that the coaxial inner conductor 52 'of the coaxial cable 5' fits through the openings.
  • Overlying side of the impedance converter is the Koaxialinnenleiter 52 'on the inside of the side wall 28 and the Koaxialau finishleiter 51' on the outside of the side wall 1e soldered. If, for example, two coaxial cables with a respective impedance of 50 ohms are used across the openings 102 and 103, this results in an input impedance of 25 ohms.
  • the impedance of the impedance converter is set to 35 ohms in such a case, so that at the opposite opening 101 again results in an impedance of 50 ohms.
  • two connection points for coaxial cable on the side wall 1e could possibly be provided only a single connection point for a single coaxial cable.
  • FIGS. 5 and 6 show two perspective views of a second embodiment of an impedance converter, the view of the FIG. 6 opposite to the view of FIG. 5 rotated by 180 °.
  • the inner conductor 2 of the impedance converter is fan-shaped, wherein three web-shaped sections 2a, 2a 'and 2a "arranged parallel to one another are provided instead of a single first web-shaped section., However, only two or even more such parallel-arranged web-shaped sections can be provided The web-shaped sections are connected to the second web-shaped section 2b via a transversely extending web 2.
  • openings 102, 103 or 102 ', 103' or 102 are connected to one another ", 103" are provided in the outer conductor 1.
  • each web-shaped section 2a, 2a 'or 2a "opens into separate end sections 2c, 2c' or 2c", as can be seen in particular FIG. 6 results.
  • an end section 2d adjoins one side of the web-shaped section 2b. All openings in the outer conductor 1 are analogous to the previous embodiment with corresponding Openings in the dielectric and aligned in the inner conductor.
  • corresponding receptacles for the end sections 2c, 2c ', 2c "and 2d are provided in the interior of the dielectric 3. These receptacles are formed by rectangular protrusions 31, 32, 33 and 34 on the insides of the dielectric Fixation of the inner conductor achieved in the dielectric.
  • FIG. 7 shows a plan view of the impedance converter of FIG. 5 or the FIG. 6 , Out FIG. 7
  • the structure of the inner conductor results.
  • the three parallel web-shaped sections 2a, 2a 'and 2a " are identically designed and have a greater width than the web-shaped section 2b, but the web-shaped sections can also be of different widths in order to achieve a desired power distribution
  • the impedance can again be tuned or changed since the web - shaped sections 2a, 2a' and 2a” essentially assume the function of the impedance transformation optionally also for the impedance transformation of the three individual branches of the inner conductor 2, wherein the length of the section is always selected such that the inner conductor is clamped between opposite side walls of the dielectric in the interior of the dielectric 3.
  • the impedance converter because of its fanned-out shape, serves for connection USs of several parallel coaxial cables
  • FIG. 8 shows a sectional view taken along the line II-II of FIG. 7 , In this case, in particular, the dimensions of the cylindrical openings in the impedance converter can be seen, corresponding coaxial cables 5 or 5 'being used for clarification in the openings.
  • the structure of the converter according to FIG. 8 is essentially identical to the structure of the converter of FIG. 4 , wherein like components are denoted by the same reference numerals. It is therefore based on a detailed description of the structure of the FIG. 8 waived and in this regard FIG. 4 directed.
  • the FIG. 8 On the left side of the impedance converter the FIG.
  • the arrangement of the openings 103, 203 and 103 is shown in the region of the end section 2c, the arrangement of the openings in the corresponding end sections 2c 'and 2c "being identical FIG. 4 the opening 103 has a shoulder S for receiving the coaxial outer conductor 51.
  • a shoulder S ' is provided and the opening 301 is disposed in a recess A, which serves to receive the insulation 53'.
  • FIG. 4 is beschirieben, the outer and inner conductors of the coaxial cables are soldered to the outer and inner conductors of the impedance converter.

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  • Waveguide Aerials (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Waveguides (AREA)
  • Coils Or Transformers For Communication (AREA)

Description

Die Erfindung betrifft eine Impedanzwandlervorrichtung gemäß dem Oberbegriff des Anspruches 1.The invention relates to an impedance converter device according to the preamble of claim 1.

Impedanzwandler werden heutzutage insbesondere in Antennenanordnungen zur Transformation von Impedanzen verwendet. Die Impedanzwandler dienen dazu, die aus einzelnen Strahlerelementen bzw. Antennenkomponenten, wie z.B. Phasenschieber, Filter, Bandpässe, resultierenden Impedanzen breitbandig auf eine gemeinsame Systemimpedanz anzupassen, welche im Mobilfunkbereich bei 50 Ohm liegt.Impedance converters are nowadays used in particular in antenna arrangements for transforming impedances. The impedance transducers serve to separate from the individual radiator elements or antenna components, such. Phase shifters, filters, bandpasses, resulting broadband impedance match a common system impedance, which is in the mobile sector at 50 ohms.

Aus dem Stand der Technik sind Impedanzwandler bekannt, bei denen eine Impedanzwandlung mittels einer λ/4-Transformation dadurch durchgeführt wird, dass zwischen Anschlüssen in der Antennenordnung Koaxialkabel zwischengeschaltet werden, die eine Länge aufweisen, die einem Viertel der Wellenlänge der Hochfrequenz entspricht, mit der die Antennenanordnung betrieben wird. Es erweist sich hierbei als nachteilhaft, dass zur Zwischenschaltung von Koaxialkabeln eine Vielzahl von Lötpunkten an den Enden der Koaxialkabel angebracht werden muss, so dass die Herstellung solcher Impedanzwandler teuer und auch wegen der Teilevielfalt stark toleranzbehaftet ist. Ebenso sind aus dem Stand der Technik Abstimmschrauben zur Veränderung der Impedanz in Koaxialelementen bekannt. Auch diese Art der Impedanzwandlung ist vergleichsweise teuer. Darüber hinaus werden Impedanztransformationen mittels Impedanzwandlern in Form von Streifenleitern auf Platinen durchgeführt. Hierbei ist es nachteilhaft, dass diese Impedanzwandler nur für begrenzte Hochfrequenzleistungen zulässig sind und eine nachträgliche Abstimmung der Impedanz nicht möglich ist, zudem ist mit Intermodulationsproblemen zu rechnen.Impedance converters are known from the prior art in which an impedance transformation is carried out by means of a λ / 4 transformation by interposing coaxial cables between terminals in the antenna arrangement which have a length which corresponds to a quarter of the wavelength of the radio frequency with which the antenna arrangement is operated. It proves to be disadvantageous that the interposition of coaxial cables a variety of soldering points at the ends the coaxial cable must be attached, so that the production of such impedance converter is expensive and also subject to high tolerances because of the variety of parts. Likewise, tuning screws for changing the impedance in coaxial elements are known from the prior art. This type of impedance conversion is relatively expensive. In addition, impedance transformations are carried out by means of impedance transformers in the form of strip conductors on printed circuit boards. In this case, it is disadvantageous that these impedance converters are only permissible for limited high-frequency powers and a subsequent tuning of the impedance is not possible, moreover, intermodulation problems are to be expected.

Ein Impedanz-Koppler ist zudem aus der EP 0 910 135 A2 bekannt geworden. Es handelt sich dabei um eine Testapparatur, bei der zwei Signalpfade möglichst reflektionsarm miteinander verbunden werden sollen. D.h., es soll eine einfache und wieder lösbare Verbindung möglich sein, die eine Kompensation der Kontaktierungsstelle beinhaltet.An impedance coupler is also out of the EP 0 910 135 A2 known. It is a test apparatus in which two signal paths should be connected with as little reflection as possible. That is, it should be a simple and re-releasable connection possible, which includes a compensation of the contact point.

Dazu ist ein Außenleitergehäuse und über ein Dielektrikum im Inneren getrennt ein Innenleiter-Verbindungsstücke vorgesehen, welches eine axiale Aufnehmung zur Kontaktierung der Innenleiter der zu verbindenden Koaxialleiter umfasst. Dieses zuinnerst liegende Innenleiter-Verbindungsstück ist nach Art eines kurzen Balkens gestaltet und umfasst zwei halbzylinderförmige Aufnahmen, die durch eine kurzen Steg voneinander getrennt sind. Hier kommen die jeweils zu verbindenden Innenleiter der beiden Koaxialkabel in unmittelbar benachbarter Lage zueinander zu liegen. Hier sind die Koaxialkabel nur einspannbar. Anpassmöglichkeiten bezüglich dieser Verbindungseinrichtung zur Veränderung einer Impedanzwandlung sind an dieser Stelle nicht vorgesehen.For this purpose, an outer conductor housing and a dielectric inside a separate inner conductor connecting pieces is provided which comprises an axial Aufnehmung for contacting the inner conductor of the coaxial conductor to be connected. This innermost inner conductor connector is designed in the manner of a short bar and includes two semi-cylindrical receptacles, which are separated by a short web. Here are each to be connected inner conductor of the two coaxial cables in an immediately adjacent position to each other. Here the coaxial cables are only clamped. Adjustments with respect to this connection device for changing an impedance conversion are not provided at this point.

Eine Hohlwellenleiter-Impedanz-Umwandler ist auch noch aus der US 2 531 437 als bekannt zu entnehmen.A hollow waveguide impedance converter is also still out of the US 2,531,437 to be known as known.

Aufgabe der Erfindung ist es deshalb, eine Impedanzwand-lervorrichtung zu schaffen, welche kostengünstig herstellbar ist, für hohe Hochfrequenz-Leistung geeignet ist und auf einfache Weise eine Abstimmung der Impedanz ermöglicht.The object of the invention is therefore to provide an impedance wall lervorrichtung, which is inexpensive to produce, is suitable for high-frequency power and allows a simple way to tune the impedance.

Diese Aufgabe wird entsprechend den im Anspruch 1 angegebenen Merkmalen gelöst. Weiterbildungen der Erfindung sind in den Unteransprüchen definiert.This object is achieved according to the features specified in claim 1. Further developments of the invention are defined in the subclaims.

Die erfindungsgemäße Impedanzwandlervorrichtung zeichnet sich durch eine spezielle Formgebung eines Außenleiters, eines Innenleiters sowie eines dazwischen liegenden Dielektrikums aus. Der Außenleiter der Vorrichtung umfasst eine Grundfläche, welche von einer oder mehreren Seitenwänden begrenzt ist, wodurch ein Außenleitergehäuse mit einem Innenraum und einer der Grundfläche gegenüberliegenden Öffnung gebildet wird. In dem Innenraum ist der Innenleiter angeordnet, wobei der Innenleiter und der Außenleiter durch das Dielektrikum voneinander isoliert sind. Der Innenleiter umfasst wenigstens einen ersten und einen zweiten stegförmigen Abschnitt mit jeweils einem Stegboden, wobei der erste stegförmige Abschnitt quer zu dessen Längsrichtung zwei seitlich versetzt zueinander liegende und sich aus dem Stegboden in Richtung zur Öffnung des Außenleitergehäuses hin erstreckende Stegwände umfasst. Durch die Ausgestaltung des Außenleiters als geöffnetes Gehäuse wird ein Zugang zu dem Innenleiter ermöglicht, insbesondere zu den Stegwänden der stegförmigen Abschnit-te. Diese beiden Stegwände können durch entsprechendes Werkzeug winkelig oder parallel zueinander verstellt werden, wodurch auf einfache Weise ein Bediener die Impedanz abstimmen kann, ohne dass Intermodulationsprobleme auftreten bzw. die Intermodulationseigenschaften verschlechtert werden.The impedance transformer device according to the invention is characterized by a special shape of an outer conductor, an inner conductor and an intervening dielectric. The outer conductor of the device comprises a base, which is bounded by one or more side walls, whereby an outer conductor housing is formed with an inner space and an opening opposite the base. In the interior of the inner conductor is arranged, wherein the inner conductor and the outer conductor are insulated from each other by the dielectric. The inner conductor comprises at least a first and a second web-shaped section, each having a land bottom, wherein the first web-shaped section transverse to the longitudinal direction comprises two laterally offset and extending from the land bottom towards the opening of the outer conductor housing extending web walls. The design of the outer conductor as an open housing allows access to the inner conductor, in particular to the web walls of the web-shaped Abschnit te. These two web walls can by appropriate Tool can be adjusted angularly or in parallel with each other, which easily an operator can tune the impedance without intermodulation problems occur or the intermodulation properties are deteriorated.

Es sei hierbei angemerkt, dass die Öffnung durch eine geeignete Verschlussvorrichtung verschlossen werden kann. In einer bevorzugten Ausführungsform ist zudem vorgesehen, dass das Gehäuse auf der Seite, welche der Grundfläche gegenüberliegt, nicht einstückig mit allen Seitenwänden des Gehäuses ausgebildet ist, so dass im Impedanzwandler immer eine (ggf. auch verschlossene) Öffnung lokalisiert werden kann. Ein weiterer Vorteil des erfindungsgemäßen Impedanzwandlers besteht darin, dass das Außenleitergehäuse universal verwendbar ist und zur Veränderung der Transformationseigenschaften des Impedanzwandlers lediglich der leicht zugängliche Innenleiter ausgetauscht werden muss. Aufgrund der durch das Außenleitergehäuse erreichten Bauhöhe kommt es zu keinen unerwünschten Abstrahlungen des Wandlers. Der Wandler kann darüber hinaus für sehr hohe Hochfrequenzleistungen verwendet werden.It should be noted here that the opening can be closed by a suitable closure device. In a preferred embodiment, it is additionally provided that the housing on the side, which is opposite to the base, is not integrally formed with all side walls of the housing, so that in the impedance converter always (possibly even closed) opening can be located. A further advantage of the impedance converter according to the invention is that the outer conductor housing can be used universally and only the easily accessible inner conductor has to be exchanged to change the transformation properties of the impedance converter. Due to the height achieved by the outer conductor housing, there is no unwanted radiation of the transducer. The converter can also be used for very high RF power.

Vorzugsweise erstreckt sich der Impedanzwandler i. w. in einer Längsrichtung zwischen wenigstens zwei gegenüberliegenden Anschlussstellen. Ferner sind wenigstens einem Stegboden eines stegförmigen Innenleiterabschnitts wenigstens zwei Stegwände zugeordnet, die sich in Richtung zur Öffnung des Außenleitergehäuses insbesondere aus Rändern des Stegbodens erstrecken. Die einem Stegboden zugeordneten Stegwände sind insbesondere parallel zueinander. In einer Ausführungsform laufen die einem Stegboden zugeordneten Stegwände in Schnittansicht entlang einer Ebene parallel zur Grundfläche des Außenleiters in Längsrichtung des Impedanzwandlers zusammen- oder auseinander. Alternativ sind die einem Stegboden zugeordneten Stegwände parallel zueinander. Ferner können die einem Stegboden zugeordneten Stegwände i. w. senkrecht auf dem Stegboden stehen. Alternativ laufen die einem Stegboden zugeordneten Stegwände in Schnittansicht entlang einer Ebene senkrecht zur Längsrichtung des Impedanzwandlers in Richtung zur Öffnung des Außenleitergehäuses auseinander- oder zusammen.Preferably, the impedance converter extends iw in a longitudinal direction between at least two opposite connection points. Furthermore, at least one web bottom of a web-shaped inner conductor section at least two web walls are assigned, extending in the direction of Opening the outer conductor housing in particular from edges of the web floor extend. The web walls associated with a web floor are in particular parallel to one another. In one embodiment, the web walls associated with a web floor run together or in a sectional view along a plane parallel to the base surface of the outer conductor in the longitudinal direction of the impedance converter. Alternatively, the web walls associated with a web floor are parallel to one another. Furthermore, the web walls associated with a web floor can essentially be perpendicular to the web floor. Alternatively, the web walls associated with a web floor run apart or together in a sectional view along a plane perpendicular to the longitudinal direction of the impedance converter in the direction of the opening of the outer conductor housing.

In einer bevorzugten Ausführungsform der Erfindung umfasst der Außenleiter ein gestanztes, einstückiges Metallblech mit umgebogenen Seitenwänden. Hierdurch wird eine äußerst preisgünstige Herstellung des Außenleiters ermöglicht, da die Herstellung durch Stanzen einfach und kostengünstig ist. Analog ist der Innenleiter vorzugsweise ebenfalls ein gestanztes, einstückiges Metallblech mit umgebogenen Stegwänden. Hierdurch wird zum einen eine kostengünstige Herstellung des Innenleiters erreicht und zum anderen wird eine gute Biegbarkeit der Stegwände gewährleistet, so dass die Impedanz durch Verbiegung der Stegwände leicht abstimmbar bzw. veränderbar ist.In a preferred embodiment of the invention, the outer conductor comprises a stamped, one-piece metal sheet with bent-over side walls. As a result, an extremely inexpensive production of the outer conductor is made possible because the production by punching is simple and inexpensive. Similarly, the inner conductor is preferably also a stamped, one-piece metal sheet with bent web walls. As a result, on the one hand a cost-effective production of the inner conductor is achieved and on the other hand, a good flexibility of the web walls is ensured, so that the impedance is easily tuned or changed by bending the web walls.

In einer bevorzugten Ausführungsform der Erfindung ist das Dielektrikum ein Bauteil mit einer Aufnahme, wobei das Bauteil im Innenraum des Außenleitergehäuses eingesetzt und der Innenleiter in der Aufnahme des Bauteils angeordnet ist. Hierdurch wird auf einfache Weise eine elektrische Isolation zwischen Innenleiter und Außenleiter durch ein separates Bauteil erreicht. Das Bauteil ist hierbei vorzugsweise einstückig ausgebildet. Ferner wird das Bauteil in einer bevorzugten Variante durch Kraftschluss, insbesondere durch eine Klemmung, und/oder durch Formschluss und/oder durch Stoffschluss im Außenleitergehäuse gehalten. Analog kann der Innenleiter durch Kraftschluss, insbesondere durch eine Klemmung, und/oder durch Formschluss und/oder durch Stoffschluss in der Aufnahme des Dielektrikums gehalten werden. Auf diese Weise wird ein einfacher Zusammenbau der Komponenten des erfindungsgemäßen Impedanzwandlers ermöglicht, ohne dass zusätzliche Befestigungsmittel vorgesehen werden müssen.In a preferred embodiment of the invention, the dielectric is a component with a receptacle, the component being used in the interior of the outer conductor housing and the inner conductor being arranged in the receptacle of the component is. As a result, an electrical insulation between the inner conductor and outer conductor is achieved by a separate component in a simple manner. The component is in this case preferably formed in one piece. Furthermore, the component is held in a preferred variant by adhesion, in particular by a clamp, and / or by positive engagement and / or by material bond in the outer conductor housing. Analogously, the inner conductor can be held in the receptacle of the dielectric by frictional connection, in particular by a clamping, and / or by positive locking and / or by material connection. In this way, a simple assembly of the components of the impedance converter according to the invention is made possible without additional fastening means must be provided.

In einer weiteren bevorzugten Variante des Wandlers weist der Innenleiter an seinen Enden Endabschnitte mit wenigstens einer oder mehreren Endflächen auf, die sich in Richtung zur Öffnung des Außenleitergehäuses erstrecken. Mit Hilfe dieser Endabschnitte wird eine Fixierung der Lage des Innenleiters im Außenleitergehäuse ermöglicht. Bei kombination dieser Variante mit der Ausführungsform, bei der das Dielektrikum ein Bauteil mit Aufnahme ist, sind eine oder mehrere Ecken der Aufnahme vorzugsweise abgerundet und nehmen Ränder der Endabschnitte des Innenleiters auf.In a further preferred variant of the converter, the inner conductor has at its ends end sections with at least one or more end surfaces which extend in the direction of the opening of the outer conductor housing. With the help of these end portions, a fixation of the position of the inner conductor in the outer conductor housing is made possible. In combination of this variant with the embodiment in which the dielectric is a component with a receptacle, one or more corners of the receptacle are preferably rounded and receive edges of the end portions of the inner conductor.

In einer besonders bevorzugten Ausführungsform der Erfindung weist der Innenleiter wenigstens einen ersten stegförmigen Abschnitt zur Impedanztransformation auf. Der erste stegförmige Abschnitt weist hierbei vorzugsweise eine Länge auf, die 1/4 der Wellenlänge einer Hochfrequenz ist, die zur Mobilfunkübertragung verwendet wird, insbesondere einer Hochfrequenz in einem GSM-Netz und/oder UMTS-Netz. Die Länge ist hierbei vorzugsweise auf die zu übertragende Mittenfrequenz abgestimmt. Es wird hierdurch der Einsatz des erfindungsgemäßen Impedanzwandlers als λ/4-Transformator in gängigen Mobilfunknetzen ermöglicht. Mit dem Impedanzwandler können ggf. auch mehrstufige λ/4-Transformationen bei Verwendung von langen Außenleitern durchgeführt werden.In a particularly preferred embodiment of the invention, the inner conductor has at least one first web-shaped section for impedance transformation. In this case, the first web-shaped section preferably has a length which is 1/4 of the wavelength of a radio frequency which is used for mobile radio transmission, in particular a radio frequency in a GSM network and / or UMTS network. The length is preferably matched to the center frequency to be transmitted. This makes it possible to use the impedance converter according to the invention as a λ / 4 transformer in common mobile radio networks. With the impedance converter, if necessary, multi-stage λ / 4 transformations can also be carried out using long external conductors.

In einer weiteren Ausführungsform der Erfindung weist der Innenleiter wenigstens einen zweiten stegförmigen Abschnitt zur Längenanpassung des Innenleiters auf. Durch den zweiten stegförmigen Abschnitt wird erreicht, dass die Länge des Innenleiters, unabhängig von den verwendeten Hochfrequenzen, immer gleich ist, so dass der Innenleiter immer in ein identisch gebautes Außenleitergehäuse eingesetzt werden kann. Durch Auswechseln des Innenleiters kann somit der Impedanzwandler einfach an unterschiedliche Antennensysteme angepasst werden.In a further embodiment of the invention, the inner conductor has at least one second web-shaped section for length adjustment of the inner conductor. By the second web-shaped section is achieved that the length of the inner conductor, regardless of the high frequencies used, is always the same, so that the inner conductor can always be used in an identically constructed outer conductor housing. By replacing the inner conductor thus the impedance converter can be easily adapted to different antenna systems.

Um den Impedanzwandler mit elektrischen Leitungen zu verbinden, sind Anschlussstellen im Außenleiter und im Innenleiter vorgesehen, welche vorzugsweise Öffnungen an Enden des Außenleiters bzw. des Innenleiters umfassen. Jede Öffnung des Außenleiters ist vorzugsweise mit einer Öffnung des Innenleiters ausgerichtet, wobei die ausgerichteten Öffnungen jeweils durch eine Öffnung im Dielektrikum miteinander verbunden sind. Die Öffnungen des Außenleiters und des Innenleiters dienen vorzugsweise zur Aufnahme und anschließendem Verlöten von Koaxialkabeln, wobei die Öffnungen des Außenleiters zur Aufnahme eines Koaxialaußenleiters und die Öffnungen des Innenleiters zur Aufnahme eines Koaxialinnenleiters dienen. Die Öffnungen des Dielektrikums sind vorzugsweise jeweils in Aussparungen aufgenommen, die insbesondere zur Aufnahme einer zwischen einem Koaxialaußenleiter und einem Koaxialinnenleiter angeordneten Isolierung dienen. Ferner können die Öffnungen des Außenleiters wenigstens eine Schulter umfassen, welche insbesondere zum Anschlag für ein Ende eines Koaxialaußenleiters dient.In order to connect the impedance converter with electrical lines, connection points in the outer conductor and in the inner conductor are provided, which preferably comprise openings at the ends of the outer conductor or of the inner conductor. Each opening of the outer conductor is preferably aligned with an opening of the inner conductor, wherein the aligned openings are each interconnected by an opening in the dielectric. The openings of the outer conductor and the inner conductor are preferably used for receiving and subsequent soldering of coaxial cables, wherein the openings of the outer conductor for receiving a Koaxialaußenleiters and the openings of the inner conductor for receiving a Koaxialinnenleiters are used. The openings of the dielectric are preferably each received in recesses, which serve in particular for receiving a arranged between a Koaxialaußenleiter and a Koaxialinnenleiter insulation. Furthermore, the openings of the outer conductor may comprise at least one shoulder, which serves in particular for abutment for one end of a Koaxialaußenleiters.

In einer bevorzugten Ausführungsform des erfindungsgemäßen Impedanzwandlers sind an den Öffnungen des Außenleiters und des Innenleiters Koaxialkabel mittels Lötpaste und/oder integrierter Lötformteile verlötet. Hierdurch wird eine automatisierte und kostengünstige Anlötung der Koaxialkabel an den Impedanzwandler ermöglicht.In a preferred embodiment of the impedance converter according to the invention coaxial cables are soldered by means of solder paste and / or integrated solder preforms at the openings of the outer conductor and the inner conductor. This allows an automated and cost-effective Anlötung the coaxial cable to the impedance converter.

Das in dem erfindungsgemäßen Impedanzwandler verwendete Dielektrikum kann in einer Ausgestaltung der Erfindung Luft umfassen, was bedeutet, dass der Innen- und Außenleiter des Impedanzwandlers durch zusätzliche Beabstandungsmittel voneinander beabstandet werden.The dielectric used in the impedance converter according to the invention may in one embodiment of the invention comprise air, which means that the inner and outer conductors of the impedance converter are spaced apart by additional spacing means.

In einer weiteren Ausgestaltung des erfindungsgemäßen Impedanzwandlers ist der Innenleiter fächerartig mit mehreren parallel angeordneten stegförmigen Abschnitten ausgestaltet. Hierdurch kann die Vorrichtung mit mehreren unterschiedlichen Systemen zusammengeschaltet werden. Zur Fixierung der stegförmigen Abschnitte sind diese jeweils in einer Aussparung im Dielektrikum angeordnet.In a further embodiment of the impedance converter according to the invention, the inner conductor is fan-shaped with a plurality of bar-shaped sections arranged in parallel. As a result, the device can be interconnected with several different systems. To fix the web-shaped sections, these are each arranged in a recess in the dielectric.

Ausführungsbeispiele der Erfindung werden nachfolgend anhand der beigefügten Figuren beschrieben.Embodiments of the invention are described below with reference to the accompanying figures.

Es zeigen:

Figur 1 :
eine perspektivische Ansicht eines Impedanzwandlers gemäß einer ersten Ausführungsform der Erfindung;
Figur 1a:
eine perspektivische Ansicht einer bevorzugten Ausführungsform eines im erfindungsgemäßen Impedanzwandler verwendeten Außenleiters;
Figur 2 :
eine gegenüber der Figur 1 um 180° gedrehte perspektivische Ansicht des Impedanzwandlers der Figur 1;
Figur 3 :
eine Draufsicht auf den Impedanzwandler der Figur 1;
Figur 4 :
eine Schnittansicht des Impedanzwandlers der Figur 3 entlang der Linie I-I;
Figur 5 :
eine perspektivische Ansicht einer zweiten Ausführungsform eines erfindungsgemäßen Impedanzwandlers;
Figur 6 :
eine gegenüber Figur 5 um 180° gedrehte perspektivische Ansicht des Impedanzwandlers der Figur 5;
Figur 7 :
eine Draufsicht auf den Impedanzwandler der Figur 6; und
Figur 8 :
eine Schnittansicht des Impedanzwandlers der Figur 7 entlang der Linie II-II.
Show it:
FIG. 1:
a perspective view of an impedance converter according to a first embodiment of the invention;
FIG. 1a
a perspective view of a preferred embodiment of an outer conductor used in the impedance converter according to the invention;
FIG. 2:
one opposite the FIG. 1 180 ° rotated perspective view of the impedance converter of FIG. 1 ;
FIG. 3:
a plan view of the impedance converter of FIG. 1 ;
FIG. 4:
a sectional view of the impedance converter of FIG. 3 along the line II;
FIG. 5:
a perspective view of a second embodiment of an impedance converter according to the invention;
FIG. 6:
one opposite FIG. 5 180 ° rotated perspective view of the impedance converter of FIG. 5 ;
FIG. 7:
a plan view of the impedance converter of FIG. 6 ; and
FIG. 8:
a sectional view of the impedance converter of FIG. 7 along the line II-II.

Figur 1 und Figur 2 zeigen perspektivische Ansichten einer ersten Ausführungsform eines erfindungsgemäßen Impedanzwandlers. Der Wandler umfasst einen Außenleiter in der Form eines äußeren länglichen Metallgehäuses 1, wobei das Gehäuse an der Oberseite offen ist und aus einem gestanzten Metallblech besteht. Das Gehäuse ist im Wesentlichen rechteckförmig ausgestaltet und weist eine (nicht aus Figur 1 und Figur 2 ersichtliche) Grundfläche 1a sowie Seitenwände 1b, 1c, 1d und 1e auf. Wie in Figur 1a gezeigt ist, ist der Außenleiter 1 vorzugsweise ein Metallblechteil, dessen Seitenwände nach oben gebogene Abschnitte des Metallblechteils sind. Die Ränder der einzelnen Seitenwände sind hierbei durch schmale Zwischenräume Z voneinander beabstandet. Im Inneren des in Figur 1a gezeigten Außenleiters kann das Dielektrikum 3 durch Kraftschluss über die gebogenen Seitenwände festgeklemmt werden. FIG. 1 and FIG. 2 show perspective views of a first embodiment of an impedance converter according to the invention. The transducer comprises an outer conductor in the form of an outer elongate metal housing 1, the housing being open at the top and being made of a stamped sheet metal. The housing is substantially rectangular in shape and has a (not aus FIG. 1 and FIG. 2 apparent) base 1a and side walls 1b, 1c, 1d and 1e on. As in FIG. 1a is shown, the outer conductor 1 is preferably a sheet metal part, the side walls are upwardly bent portions of the sheet metal part. The edges of the individual side walls are hereby separated by narrow spaces Z from each other. Inside the in FIG. 1a the outer conductor shown, the dielectric 3 can be clamped by adhesion over the curved side walls.

Das Dielektrikum ist ebenfalls an der Oberseite geöffnet und in seinem Inneren ist ein Innenleiter 2 eingesetzt. Dieser Innenleiter weist Endabschnitte 2c bzw. 2d auf, welche jeweils Seitenwände 24, 25, 26 bzw. 27, 28, 29 umfassen. Die Endabschnitte sind über abgerundete Ecken 3a, 3b, 3c und 3d im Dielektrikum 3 eingeschoben. Der Innenleiter 2 weist eine Länge auf, so dass er in dem Innenraum des Dielektrikums 3 über die Endabschnitte 2c und 2d festgeklemmt ist. Der Innenleiter umfasst zwischen den Endabschnitten 2c und 2d zwei miteinander verbundene stegförmige Abschnitte 2a und 2b. Der erste stegförmige Abschnitt 2a umfasst einen Stegboden 21 sowie zwei sich senkrecht nach oben erstreckende Stegwände 22 und 23. Analog umfasst der zweite stegförmige Abschnitt 2b einen (nicht aus Figur 1 und 2 ersichtlichen) Stegboden 21' und Stegwände 22' und 23'. Der Innenleiter ist vorzugsweise als einstückiges Metallblech ausgebildet, wobei in dem Metallblech zunächst die Formgebung der Seitenwände des Endabschnitts und der stegförmigen Abschnitte ausgestanzt wird und anschließend die Seitenwände und Stegwände nach oben gebogen werden. Durch die Verwendung von gestanzten Blechen für den Außenleiter und den Innenleiter wird eine preisgünstige und einfache Herstellung des Impedanzwandlers gewährleistet.The dielectric is also open at the top and in its interior, an inner conductor 2 is inserted. This inner conductor has end sections 2c and 2d, which respectively comprise side walls 24, 25, 26 and 27, 28, 29. The end sections are inserted over rounded corners 3a, 3b, 3c and 3d in the dielectric 3. The inner conductor 2 has a length so as to be clamped in the inner space of the dielectric 3 via the end portions 2c and 2d. The inner conductor comprises between the end portions 2c and 2d two interconnected web-shaped sections 2a and 2b. The first web-shaped section 2a comprises a web floor 21 and two web walls 22 and 23 extending vertically upwards. Similarly, the second web-shaped section 2b comprises a (not aus FIGS. 1 and 2 apparent) web bottom 21 'and web walls 22' and 23 '. The inner conductor is preferably formed as a one-piece metal sheet, wherein in the metal sheet, first the shape of the side walls of the end portion and the web-shaped portions is punched out and then the side walls and web walls are bent upwards. The use of stamped sheets for the outer conductor and the inner conductor ensures a low-cost and simple production of the impedance converter.

Mit der Breite der stegförmigen Abschnitte 2a, 2b und der entsprechenden aufgebogenen Stegwände bzw. mit der Höhe der stegförmigen Abschnitte über dem Außenleiterboden (Abstand durch Dielektrikum) kann die Transformationsimpedanz eingestellt werden.With the width of the web-shaped sections 2a, 2b and the corresponding bent web walls or with the height of the web-shaped sections over the outer conductor ground (distance through dielectric), the transformation impedance can be adjusted.

Der erste stegförmige Abschnitt 2a dient zur Transformation der Impedanz, wenn der Impedanzwandler in einer Antennenanordnung zwischen Koaxialkabeln eingelötet wird. Die Länge des ersten stegförmigen Abschnitts 2a beträgt 1/4 einer Wellenlänge λ, wodurch eine λ/4-Transformation durchgeführt wird, wobei λ der Wellenlänge der Hochfrequenz entspricht, mit der die entsprechende Antennenanordnung betrieben wird. Es handelt sich hierbei vorzugsweise um die gängigen Mobilfunkfrequenzen, wie z.B. 900 oder 1800 MHz in GSM-Netzen. Im Gegensatz zum ersten stegförmigen Abschnitt 2a dient der zweite stegförmige Abschnitt 2b des Impedanzwandlers vorrangig zur Längenkorrektur. D.h., die Länge des zweiten stegförmigen Abschnitts wird in Abhängigkeit von der Länge des ersten stegförmigen Abschnitts und der Gesamtlänge des Impedanzwandlers immer so gewählt, dass der Innenleiter immer in der gleichen Lage im Dielektrikum fixiert ist.The first web-shaped portion 2a serves to transform the impedance when the impedance transformer is soldered in an antenna arrangement between coaxial cables. The length of the first web-shaped section 2a is 1/4 of a wavelength λ, whereby a λ / 4 transformation is performed, where λ corresponds to the wavelength of the high frequency with which the corresponding antenna arrangement is operated. These are preferably the usual mobile radio frequencies, such as 900 or 1800 MHz in GSM networks. In contrast to the first web-shaped section 2a, the second web-shaped section 2b of the impedance converter is primarily used for length correction. That is to say, the length of the second web-shaped section is always selected as a function of the length of the first web-shaped section and the overall length of the impedance converter so that the inner conductor is always fixed in the same layer in the dielectric.

Der Innenleiter 2 weist den großen Vorteil auf, dass seine Impedanz durch Verbiegung der Stegwände des ersten stegförmigen Abschnitts 2a angepasst bzw. verändert werden kann. Dies ist insbesondere bei der Fertigung des Impedanzwandlers von Vorteil, da am Ende des Fertigungsprozesses nochmals etwaige Toleranzen in der Impedanz durch Verbiegung der Stegwände 22 bzw. 23 ausgeglichen werden können. Gegebenenfalls kann der zweite stegförmige Abschnitt auch derart ausgestaltet sein, dass er ebenfalls die Impedanz beeinflusst, so dass auch durch Verbiegung der Stegwände 22' bzw. 23' die Impedanz des Wandlers verändert werden kann.The inner conductor 2 has the great advantage that its impedance can be adjusted or changed by bending the web walls of the first web-shaped section 2a. This is particularly advantageous in the production of the impedance converter, since at the end of the manufacturing process any tolerances in the impedance by bending the web walls 22 and 23 can be compensated. Optionally, the second web-shaped section can also be designed such that it likewise influences the impedance, so that the impedance of the transducer can also be changed by bending the web walls 22 'or 23'.

Der Außenleiter 1 des Impedanzwandlers weist eine zylindrische Öffnung 101 in der Seitenfläche 1e sowie zwei miteinander verbundene zylindrische Öffnungen 102 und 103 in der Seitenfläche 1c auf. Diese Öffnungen sind über entsprechende zylindrische Öffnungen 301, 302 und 303 im Dielektrikum 3 mit kleineren zylindrischen Öffnungen 201, 202 und 203 in den Endabschnitten 2c bzw. 2d verbunden. Die Öffnungen im Außenleiter und im Innenleiter dierien zur Verbindung mit einem Koaxialkabel, wobei die Öffnungen des Außenleiters zur Aufnahme eines Koaxialaußenleiters und die entsprechenden Öffnungen im Innenleiter zur Aufnahme des entsprechenden Koaxialinnenleiters dienen. Zur Befestigung der Koaxialleiter des Kabels werden die Leiter an den Öffnungen verlötet. Insbesondere werden an den Außenseiten der Seitenwände 1c und 1e des Gehäuses 1 Lötungen für die Koaxialaußenleiter und in den Endabschnitten 2c und 2d des Innenleiters 2 Lötungen für den Koaxialinnenleiter angebracht. Durch integrierte Lötformteile bzw. Lötpaste kann die Innen- und Außenleiterlötung zwischen dem Impedanzwandler und den Koaxialkabeln automatisiert erfolgen (z.B. Induktionslötung). Im Vergleich zu herkömmlichen Impedanzwandlern, bei denen Koaxialkabel zur Impedanzwandlung als Zwischenverbindung eingelötet werden, benötigt man bei dem erfindungsgemäßen Impedanzwandler eine geringere Anzahl an Lötstellen. Darüber hinaus wird durch die Bauhöhe des Impedanzwandlers Abstrahlungen vermieden, welche beispielsweise bei Impedanzwandlern in der Form von Streifenleitern auf Platinen auftreten.The outer conductor 1 of the impedance converter has a cylindrical opening 101 in the side surface 1e and two interconnected cylindrical openings 102 and 103 in the side surface 1c. These openings are connected via respective cylindrical openings 301, 302 and 303 in the dielectric 3 with smaller cylindrical openings 201, 202 and 203 in the end portions 2c and 2d, respectively. The openings in the outer conductor and in the inner conductor dierien for connection to a coaxial cable, wherein the openings of the outer conductor for receiving a Koaxialaußenleiters and the corresponding openings in the inner conductor for receiving the corresponding Koaxialinnenleiters are used. To attach the coaxial conductors of the cable, the conductors are soldered to the openings. In particular, solderings for the coaxial outer conductors and, in the end sections 2c and 2d of the inner conductor 2, solderings for the coaxial inner conductor are applied to the outer sides of the side walls 1c and 1e of the housing 1. Integrated Lötformteile or solder paste, the internal and Außenleiterlötung between the impedance converter and the coaxial cables automated done (eg induction soldering). Compared to conventional impedance converters in which coaxial cables are soldered for impedance conversion as an interconnect, the impedance converter according to the invention requires a smaller number of solder joints. In addition, the height of the impedance converter avoids emissions which occur, for example, in the case of impedance transformers in the form of strip conductors on printed circuit boards.

Figur 3 zeigt eine Draufsicht auf den Impedanzwandler aus Figur 1 bzw. Figur 2. Aus Figur 3 ist insbesondere ersichtlich, dass der Stegboden 21 des ersten stegförmigen Abschnitts 2a breiter ist als der Stegboden 21' des zweiten stegförmigen Abschnitts 2b. Ferner ist die Länge des zweiten stegförmigen Abschnitts geringer als die Länge des ersten stegförmigen Abschnitts. Durch die verkleinerte Bauart des zweiten stegförmigen Abschnitts wird erreicht, dass dieser Abschnitt nur einen geringen bzw. überhaupt keinen Einfluss auf die Impedanz des Wandlers hat. Aus Figur 3 ist ferner ersichtlich, dass die Stegwände 22 und 23 sowie 22' und 23' der stegförmigen Abschnitte gut von oben zugänglich sind, so dass ein Bediener durch Verbiegung der Stegwände die Impedanz gegebenenfalls nachjustieren bzw. abstimmen kann. FIG. 3 shows a plan view of the impedance converter FIG. 1 respectively. FIG. 2 , Out FIG. 3 is particularly apparent that the web bottom 21 of the first web-shaped portion 2a is wider than the web bottom 21 'of the second web-shaped portion 2b. Furthermore, the length of the second web-shaped section is less than the length of the first web-shaped section. Due to the reduced design of the second web-shaped section is achieved that this section has little or no influence on the impedance of the transducer. Out FIG. 3 It can also be seen that the web walls 22 and 23 as well as 22 'and 23' of the web-shaped sections are easily accessible from above, so that an operator can adjust or tune the impedance if necessary by bending the web walls.

In Figur 4 ist eine Schnittansicht entlang der Linie I-I der Figur 3 gezeigt, wobei mit gestrichelten Linien die Position von Koaxialkabeln angedeutet ist, welche mit dem Impedanzwandler verbunden werden. Ferner ist der Querschnitt des Außenleitergehäuses 1 mit einer einfachen Schraffur angedeutet, wohingegen der Querschnitt des Dielektrikums 3 mit einer doppelten Schraffur dargestellt ist. Aus Figur '4 ergeben sich insbesondere die Durchmesser der Öffnungen 101 und 103 im Außenleitergehäuse, der Öffnungen 301 und 303 im Dielektrikum sowie der Öffnungen 201 und 203 im Innenleitergehäuse. Von den Öffnungen 103, 203 und 303 weist die Öffnung 103 den größten Durchmesser auf, wobei sie zur Aufnahme eines Koaxialaußenleiters 51 eines Koaxialkabels 5 dient. Der eingesetzte Koaxialaußenleiter schlägt dabei an einer umlaufenden Schulter S in der Öffnung 103 an. Die Öffnung 303 weist einen geringeren Durchmesser als die Öffnung 103 auf und dient zur Aufnahme einer Isolierung 53 des Koaxialkabels 5. Die Öffnung 203 weist den kleinsten Durchmesser auf und dient zur Aufnahme des Koaxialinnenleiters 52 des Koaxialkabels 5. Der Koaxialaußenleiter 51 wird über eine Lötung an der Außenseite der Seitenwand 1c befestigt. Analog wird der Koaxialinnenleiter 52 an der Innenseite der Seitenwand 25 verlötet.In FIG. 4 is a sectional view taken along the line II of FIG. 3 shown with dashed lines the position of coaxial cables is indicated, which are connected to the impedance converter. Furthermore, the cross section of the outer conductor housing 1 is indicated with a simple hatching, whereas the cross section of the dielectric 3 is shown with a double hatching. From Figure '4, in particular, the diameter arise the openings 101 and 103 in the outer conductor housing, the openings 301 and 303 in the dielectric and the openings 201 and 203 in the inner conductor housing. Of the openings 103, 203 and 303, the opening 103 has the largest diameter, wherein it serves to receive a Koaxialaußenleiters 51 of a coaxial cable 5. The inserted coaxial outer conductor strikes against a circumferential shoulder S in the opening 103. The opening 303 has a smaller diameter than the opening 103 and serves to receive an insulation 53 of the coaxial cable 5. The opening 203 has the smallest diameter and serves to receive the Koaxialinnenleiters 52 of the coaxial cable 5. The Koaxialaußenleiter 51 via a soldering the outside of the side wall 1c attached. Similarly, the Koaxialinnenleiter 52 is soldered to the inside of the side wall 25.

Die Öffnungen 101, 201 und 301 im Bereich der Seitenwand 1e sind für ein größeres bzw. dampfungsärmeres Koaxialkabel 5' ausgelegt. Analog zur Öffnung 103 weist die Öffnung 101 eine entsprechende Schulter S' auf, gegen die ein Ende eines Koaxialaußenleiters 51' anschlägt. Die Öffnung 301 ist kleiner als die Öffnung 101 und sie ist in einer zylindrischen Aussparung A im Dielektrikum 3 angeordnet, wobei die Aussparung derart gewählt ist, dass die Isolierung 53' des Koaxialkabels 5' darin aufgenommen werden kann. Die Größe der Öffnung 201 im Innenleiter 2 entspricht im Wesentlichen der Größe der Öffnung 301 im Dielektrikum 3, wobei der Durchmesser der Öffnungen derart gewählt ist, dass der Koaxialinnenleiter 52' des Koaxialkabels 5' durch die Öffnungen passt. Analog zu der gegen-. überliegenden Seite des Impedanzwandlers ist der Koaxialinnenleiter 52' an der Innenseite der Seitenwand 28 und der Koaxialaußenleiter 51' an der Außenseite der Seitenwand 1e verlötet. Wenn über die Öffnungen 102 und 103 beispielsweise zwei Koaxialkabel mit jeweils 50 Ohm Impedanz eingesetzt werden, ergibt sich an dieser Stelle eine Eingangsimpedanz von 25 Ohm. Die Impedanz des Impedanzwandlers ist in einem solchen Fall auf 35 Ohm einzustellen, damit sich an der gegenüberliegenden Öffnung 101 wieder eine Impedanz von 50 Ohm ergibt. Anstatt von zwei Anschlussstellen für Koaxialkabel an der Seitenwand 1e könnte ggf. auch nur eine einzige Anschlussstelle für ein einzelnes Koaxialkabel vorgesehen sein.The openings 101, 201 and 301 in the region of the side wall 1e are designed for a larger or low-steam coaxial cable 5 '. Analogous to the opening 103, the opening 101 has a corresponding shoulder S 'against which an end of a coaxial outer conductor 51' abuts. The opening 301 is smaller than the opening 101 and it is arranged in a cylindrical recess A in the dielectric 3, wherein the recess is selected such that the insulation 53 'of the coaxial cable 5' can be accommodated therein. The size of the opening 201 in the inner conductor 2 substantially corresponds to the size of the opening 301 in the dielectric 3, wherein the diameter of the openings is selected such that the coaxial inner conductor 52 'of the coaxial cable 5' fits through the openings. Analogous to the opposite. Overlying side of the impedance converter is the Koaxialinnenleiter 52 'on the inside of the side wall 28 and the Koaxialaußenleiter 51' on the outside of the side wall 1e soldered. If, for example, two coaxial cables with a respective impedance of 50 ohms are used across the openings 102 and 103, this results in an input impedance of 25 ohms. The impedance of the impedance converter is set to 35 ohms in such a case, so that at the opposite opening 101 again results in an impedance of 50 ohms. Instead of two connection points for coaxial cable on the side wall 1e could possibly be provided only a single connection point for a single coaxial cable.

Figuren 5 und 6 zeigen zwei perspektivische Ansichten einer zweiten Ausführungsform eines Impedanzwandlers, wobei die Ansicht der Figur 6 gegenüber der Ansicht der Figur 5 um 180° gedreht ist. Im Unterschied zur ersten Ausführungsform ist der Innenleiter 2 des Impedanzwandlers fächerförmig ausgestaltet, wobei anstatt eines einzelnen ersten stegförmigen Abschnitts drei parallel zueinander angeordnete stegförmige Abschnitte 2a, 2a' und 2a" vorgesehen sind. Es können jedoch auch nur zwei oder auch mehr solcher parallel angeordneter stegförmiger Abschnitte vorgesehen sein. Die stegförmigen Abschnitte sind über einen quer verlaufenden Steg 2e mit dem zweiten stegförmigen Abschnitt 2b verbunden. Zur Kontaktierung der drei ersten stegförmigen Abschnitte mit entsprechenden Koaxialkabeln sind jeweils miteinander verbundene Öffnungen 102, 103 bzw. 102', 103' bzw. 102", 103" im Außenleiter 1 vorgesehen. Ferner mündet jeder stegförmige Abschnitt 2a, 2a' bzw. 2a" in separate Endabschnitte 2c, 2c' bzw. 2c", wie sich insbesondere aus Figur 6 ergibt. Ebenso schließt sich an einer Seite des stegförmigen Abschnitts 2b ein Endabschnitt 2d an. Alle Öffnungen in dem Außenleiter 1 sind analog zu der vorangegangenen Ausführungsform mit entsprechenden Öffnungen im Dielektrikum und im Innenleiter ausgerichtet. Zur Befestigung des Innenleiters im Dielektrikum sind im Innenraum des Dielektrikums entsprechende Aufnahmen für die Endabschnitte 2c, 2c', 2c" und 2d vorgesehen. Diese Aufnahmen werden durch quaderförmige Vorsprünge 31, 32, 33 und 34 an den Innenseiten des Dielektrikums gebildet. Hierdurch wird eine Fixierung des Innenleiters im Dielektrikum erreicht. FIGS. 5 and 6 show two perspective views of a second embodiment of an impedance converter, the view of the FIG. 6 opposite to the view of FIG. 5 rotated by 180 °. In contrast to the first embodiment, the inner conductor 2 of the impedance converter is fan-shaped, wherein three web-shaped sections 2a, 2a 'and 2a "arranged parallel to one another are provided instead of a single first web-shaped section., However, only two or even more such parallel-arranged web-shaped sections can be provided The web-shaped sections are connected to the second web-shaped section 2b via a transversely extending web 2. For contacting the three first web-shaped sections with corresponding coaxial cables, openings 102, 103 or 102 ', 103' or 102 are connected to one another ", 103" are provided in the outer conductor 1. Furthermore, each web-shaped section 2a, 2a 'or 2a "opens into separate end sections 2c, 2c' or 2c", as can be seen in particular FIG. 6 results. Likewise, an end section 2d adjoins one side of the web-shaped section 2b. All openings in the outer conductor 1 are analogous to the previous embodiment with corresponding Openings in the dielectric and aligned in the inner conductor. For the purpose of fixing the inner conductor in the dielectric, corresponding receptacles for the end sections 2c, 2c ', 2c "and 2d are provided in the interior of the dielectric 3. These receptacles are formed by rectangular protrusions 31, 32, 33 and 34 on the insides of the dielectric Fixation of the inner conductor achieved in the dielectric.

Figur 7 zeigt eine Draufsicht auf den Impedanzwandler der Figur 5 bzw. der Figur 6. Aus Figur 7 ergibt sich insbesondere die Struktur des Innenleiters. Es ist ersichtlich, dass die drei parallelen stegförmigen Abschnitte 2a, 2a' und 2a" identisch ausgestaltet sind und eine größere Bereite als der stegförmige Abschnitt 2b aufweise. Die stegförmigen Abschnitte können jedoch auch unterschiedlich breit sein, um eine erwünschte Leistungsaufteilung zu erreichen. Durch Verbiegung der Stegwände der stegförmigen Abschnitte 2a, 2a' und 2a" kann wiederum die Impedanz abgestimmt bzw. verändert werden, da die stegförmigen Abschnitte 2a, 2a' und 2a" im Wesentlichen die Funktion der Impedanztransformation übernehmen. Der schmälere stegförmige Abschnitt 2b dient zur Längenanpassung bzw. gegebenenfalls auch zur Impedanztransformation der drei Einzelzweige des Innenleiters 2, wobei die Länge des Abschnitts immer so gewählt wird, dass der Innenleiter in dem Innenraum des Dielektrikums 3 zwischen gegenüberliegenden Seitenwänden des Dielektrikums festgeklemmt ist. Der Impedanzwandler dient aufgrund seiner aufgefächerten Form zum Anschluss von mehreren parallelen Koaxialkabeln, so dass eine Zusammenschaltung und Impedanztransformation von mehreren Antennensystemen ermöglicht wird. FIG. 7 shows a plan view of the impedance converter of FIG. 5 or the FIG. 6 , Out FIG. 7 In particular, the structure of the inner conductor results. It can be seen that the three parallel web-shaped sections 2a, 2a 'and 2a "are identically designed and have a greater width than the web-shaped section 2b, but the web-shaped sections can also be of different widths in order to achieve a desired power distribution In the case of the web walls of the web - shaped sections 2a, 2a 'and 2a ", the impedance can again be tuned or changed since the web - shaped sections 2a, 2a' and 2a" essentially assume the function of the impedance transformation optionally also for the impedance transformation of the three individual branches of the inner conductor 2, wherein the length of the section is always selected such that the inner conductor is clamped between opposite side walls of the dielectric in the interior of the dielectric 3. The impedance converter, because of its fanned-out shape, serves for connection USs of several parallel coaxial cables, so that an interconnection and impedance transformation of multiple antenna systems is made possible.

Figur 8 zeigt eine Schnittansicht entlang der Linie II-II der Figur 7. Es sind hierbei insbesondere die Abmessungen der zylindrischen Öffnungen in dem Impedanzwandler ersichtlich, wobei zur Verdeutlichung in den Öffnungen entsprechende Koaxialkabel 5 bzw. 5' eingesetzt sind. Der Aufbau des Wandlers gemäß Figur 8 ist im wesentlichen identisch zum Aufbau des Wandlers der Figur 4, wobei gleiche Bauteile mit den gleichen Bezugszeichen bezeichnet sind. Es wird deshalb auf eine detaiilierte Beschreibung des Aufbaus der Figur 8 verzichtet und diesbezüglich auf Figur 4 verwiesen. Auf der linken Seite des Impedanzwandlers der Figur 8 ist die Anordnung der Öffnungen 103, 203 und 103 im Bereich des Endabschnitts 2c dargestellt, wobei die Anordnung der Öffnungen in den entsprechenden Endabschnitten 2c' und 2c" identisch ist. Analog zu Figur 4 weist die Öffnung 103 eine Schulter S zur Aufnahme des Koaxialaußenleiters 51 auf. Ebenso ist auf der gegenüberliegenden rechten Seite des Wandlers in der Öffnung 101 eine Schulter S' vorgesehen und die Öffnung 301 ist in einer Aussparung A angeordnet, welche zur Aufnahme der Isolierung 53' dient. Wie in Bezug auf Figur 4 beschirieben ist, werden die Außen- und Innenleiter der Koaxialkabel an den Außen- und Innenleitern des Impedanzwandlers angelötet. FIG. 8 shows a sectional view taken along the line II-II of FIG. 7 , In this case, in particular, the dimensions of the cylindrical openings in the impedance converter can be seen, corresponding coaxial cables 5 or 5 'being used for clarification in the openings. The structure of the converter according to FIG. 8 is essentially identical to the structure of the converter of FIG. 4 , wherein like components are denoted by the same reference numerals. It is therefore based on a detailed description of the structure of the FIG. 8 waived and in this regard FIG. 4 directed. On the left side of the impedance converter the FIG. 8 the arrangement of the openings 103, 203 and 103 is shown in the region of the end section 2c, the arrangement of the openings in the corresponding end sections 2c 'and 2c "being identical FIG. 4 the opening 103 has a shoulder S for receiving the coaxial outer conductor 51. Likewise, on the opposite right side of the transducer in the opening 101, a shoulder S 'is provided and the opening 301 is disposed in a recess A, which serves to receive the insulation 53'. As for FIG. 4 is beschirieben, the outer and inner conductors of the coaxial cables are soldered to the outer and inner conductors of the impedance converter.

Claims (27)

  1. Impedance transformer, more particularly for transforming impedances in antenna arrays, with the following features:
    comprising an electrically conducting outer conductor (1) with one or more terminal points for electrical wires,
    comprising an electrically conducting inner conductor (2) with one or more terminal points for electrical wires,
    comprising a dielectric (3) arranged between outer conductor (1) and inner conductor (2),
    the outer conductor (1) encompasses a base (1a), which is delimited by one or more sidewalls (1b, 1c, 1d, 1e), such that an outer conductor housing comprising an interior space and an opening located opposite the base (1a) is formed,
    the inner conductor (2) is disposed in the interior space, the inner conductor (2) and the outer conductor (1) being isolated from one another by the dielectric (3);
    the inner conductor (2) encompasses at least two web-shaped sections (2a, 2b) connected together, the first web-shaped section (2a) comprising a web bottom (21) and the second web-shaped section (2b) comprising a web bottom (21),
    the first web-shaped section (2a) as well as the web bottom (21) also comprises two web walls (22, 23) that extend from the web bottom (21) in the direction of the opening of the outer conductor housing, wherein the two web walls (22, 23) run together or apart from one another and are bendable to balance out any tolerances in the impedance.
  2. Device according to Claim 1, characterized in that the inner conductor (2) of the impedance transformer provides two offset terminal points, preferably in the form of final sections (2c, 2d) for connecting a coaxial inner conductor between which the at least one first web-shaped section (2a) with the web bottom (21) is located.
  3. Device according to Claim 1 or 2, characterized in that the first web-shaped section (2a) of the inner conductor (2) is dependent on the transformation-impedance.
  4. Device according to any one of Claims 1 to 3, characterized in that the at least one web-shaped section (2a) has a width dependent on the transformation-impedance and/or a distance dependent on the transformation-impedance to a bottom forming part of the outer conductor (1), wherein the distance dependent on the transformation-impedance is preferably formed by a dielectric.
  5. Device according to any one of Claims 1 to 4, characterized in that in order to transform the impedance the web-shaped section (2a) has a length, which equates to 1/4 of the wavelength (λ, lambda) of the high frequency transmitted by means of the device, in particular the high frequency used in a GSM network and/or a UMTS network.
  6. Device according to any one of Claims 1 to 5, characterized in that the inner conductor (2) has at least one second web-shaped section (2b) to adjust the length of the inner conductor (2), wherein the total length made up of first and second web-shaped sections (2a, 2b) is equal to a differently formed inner conductor (2), which in harmony with another impedance transformation has a deviating length with respect to the first web-shaped section (2a).
  7. Device according to Claim 6, characterized in that the second web-shaped section (2b) also comprises at least two web walls (22', 23'), which are connected to the web bottom (21) and are arranged at a lateral distance from one another, wherein the at least two web walls (22', 23') in order to change the impedance can be deformed towards or apart from each other.
  8. Device according to any one of Claims 1 to 7, characterized in that the at least one web-shaped section (2a) or the inner conductor (2) comprising the at least first web-shaped section (2a) and the at least second web-shaped section (2b) can be pre-selected corresponding to the desired impedance transformation with suitable dimensioning or an inner conductor (2), pre-defined depending on the impedance, can be replaced by another inner conductor (2) with different values with respect to the impedance transformation.
  9. Device according to any one of Claims 1 to 8, characterized in that the impedance transformer extends in a longitudinal direction between at least two opposite terminal points and at least two web walls (22, 23; 22', 23') are assigned to at least one web bottom (21; 21') of a web-shaped section (2a, 2b), which extend in the direction of the opening of the outer conductor housing particularly from edges of the web bottom (21; 21').
  10. Device according to Claim 9, characterized in that the web walls (22, 23; 22', 23') assigned to a web bottom (21; 21'), in cutaway view along a level parallel to the base (1a) of the outer conductor (1), run together or apart in the longitudinal direction of the impedance transformer.
  11. Device according to any one of the preceding claims, characterized in that the outer conductor (1) comprises a stamped, integral metal sheet with bent sidewalls (1b, 1c, 1d, 1e).
  12. Device according to any one of the preceding claims, characterized in that the inner conductor (2) comprises a stamped, integral metal sheet with bent web walls (21, 22; 21', 22').
  13. Device according to any one of the preceding claims, characterized in that the dielectric (3) is a component with a recess (4f), wherein the component is inserted in the interior space of the outer conductor housing and the inner conductor (2) is arranged in the recess of the component.
  14. Device according to Claim 13, characterized in that the component is integrally formed.
  15. Device according to Claim 13 or 16, characterized in that the dielectric is held in the outer conductor housing by grip force, particularly by a clamp, and/or by form fit and/or by adhesive bond.
  16. Device according to any one of Claims 13 to 15, characterized in that the inner conductor (2) is held in the recess (3f) of the dielectric (3) by grip force, particularly by a clamp, and/or by form fit and/or by adhesive bond.
  17. Device according to any one of the preceding claims, characterized in that the inner conductor (2) at its ends has final sections (2c, 2d) with at least one or more end faces (24, 25, 26, 27, 28, 29), which extend in the direction of the opening of the outer conductor housing.
  18. Device according to Claim 17, characterized in that one or more corners (3a, 3b, 3c, 3d) of the recess of the dielectric (3) are rounded off and receive edges of the final sections (2c, 2d) of the inner conductor (2).
  19. Device according to any one of the preceding claims, characterized in that the terminal points of the outer conductor (1) and the inner conductor (2) comprise openings (101, 102, 103; 201, 202, 203), in particular cylindrical openings, at ends of the outer conductor (1) and the inner conductor (2).
  20. Device according to Claim 19, characterized in that each opening (101, 102, 103) of the outer conductor (1) is aligned with an opening (201, 202, 203) of the inner conductor (2), wherein the aligned openings are connected together in each case though an opening (301, 302, 303) in the dielectric (3).
  21. Device according to Claim 19 or 20, characterized in that the openings (101, 102, 103; 201, 202, 203) of the outer conductor (1) and the inner conductor (2) are designed to receive and subsequently solder coaxial cables, wherein the openings (101, 102, 103) of the outer conductor (1) serve to receive a coaxial outer conductor (51, 51') and the openings (201, 202, 203) of the inner conductor (2) serve to receive a coaxial inner conductor (52, 52').
  22. Device according to Claim 20 or Claim 21, if dependent on Claim 20, characterized in that the openings (301, 302, 303) of the dielectric (3) in each case are located in recesses (A), which in particular serve to hold insulation (53, 53') arranged between a coaxial outer conductor (51, 51') and a coaxial inner conductor (52, 52').
  23. Device according to any one of Claims 19 to 22, characterized in that the openings (101, 102, 103) of the outer conductor (1) comprise at least one shoulder (S, S') which in particular serves as the abutment for one end of a coaxial outer conductor (51, 51').
  24. Device according to any one of the preceding claims, characterized in that the dielectric (3) is air.
  25. Device according to any one of the preceding claims, characterized in that the inner conductor (2) has a fan-shaped configuration with a plurality of web-shaped sections (2a, 2a', 2a") arranged in parallel.
  26. Device according to Claim 25, characterized in that one end of the web-shaped sections (2a, 2a', 2a", 2b) in each case is arranged in a recess in the dielectric (3).
  27. Device according to any one of Claims 1 to 26, characterized in that the opening of the outer conductor housing is closed by means of a closing device.
EP05738431A 2004-04-29 2005-04-28 Impedance transformer Expired - Fee Related EP1741158B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200410021086 DE102004021086A1 (en) 2004-04-29 2004-04-29 Impedance converting device
PCT/EP2005/004590 WO2005107005A1 (en) 2004-04-29 2005-04-28 Impedance transformer

Publications (2)

Publication Number Publication Date
EP1741158A1 EP1741158A1 (en) 2007-01-10
EP1741158B1 true EP1741158B1 (en) 2008-12-31

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Application Number Title Priority Date Filing Date
EP05738431A Expired - Fee Related EP1741158B1 (en) 2004-04-29 2005-04-28 Impedance transformer

Country Status (6)

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EP (1) EP1741158B1 (en)
CN (1) CN2807499Y (en)
DE (2) DE102004021086A1 (en)
ES (1) ES2318482T3 (en)
TW (1) TWI335102B (en)
WO (1) WO2005107005A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4631965B2 (en) * 2008-12-18 2011-02-16 ミツミ電機株式会社 Antenna amplifier
CN105186253A (en) * 2015-08-20 2015-12-23 京信通信技术(广州)有限公司 Implementation method, application method and connection structure for welding tin-solderable conductor and tin-unsolderable matrix
CN116208239B (en) * 2023-05-06 2023-06-30 北京安天网络安全技术有限公司 Signal receiving circuit

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB591667A (en) * 1942-03-31 1947-08-25 Sperry Gyroscope Co Inc Improvements in or relating to impedance transformers for wave guides
US2767380A (en) * 1952-09-30 1956-10-16 Bell Telephone Labor Inc Impedance transformer
US3063027A (en) * 1955-02-14 1962-11-06 Hughes Aircraft Co High power microwave isolator
GB1095103A (en) * 1966-03-25 1967-12-13 Mullard Ltd Variable-impedance transmission-line device
DE3811985A1 (en) * 1988-04-11 1989-10-19 Siemens Ag ARRANGEMENT FOR IMPEDANCE TRANSFER
EP0469779B1 (en) * 1990-07-30 1999-09-29 Sony Corporation A matching device for a microstrip antenna
ATE241221T1 (en) * 1997-09-18 2003-06-15 Johnstech Int Corp EXTENDED COAXIAL CONNECTOR
DE10217387B4 (en) * 2002-04-18 2018-04-12 Snaptrack, Inc. Electrical matching network with a transformation line

Also Published As

Publication number Publication date
EP1741158A1 (en) 2007-01-10
DE102004021086A1 (en) 2005-11-24
WO2005107005A8 (en) 2006-01-12
DE502005006382D1 (en) 2009-02-12
TWI335102B (en) 2010-12-21
WO2005107005A1 (en) 2005-11-10
TW200536173A (en) 2005-11-01
CN2807499Y (en) 2006-08-16
ES2318482T3 (en) 2009-05-01

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