WO2009036749A1 - Agencement permettant d'agir avec un minimum de pertes sur le comportement de diffusion d'une onde de signal hf - Google Patents

Agencement permettant d'agir avec un minimum de pertes sur le comportement de diffusion d'une onde de signal hf Download PDF

Info

Publication number
WO2009036749A1
WO2009036749A1 PCT/DE2008/001557 DE2008001557W WO2009036749A1 WO 2009036749 A1 WO2009036749 A1 WO 2009036749A1 DE 2008001557 W DE2008001557 W DE 2008001557W WO 2009036749 A1 WO2009036749 A1 WO 2009036749A1
Authority
WO
WIPO (PCT)
Prior art keywords
coating
characteristic impedance
substrate
layer
arrangement according
Prior art date
Application number
PCT/DE2008/001557
Other languages
German (de)
English (en)
Inventor
Martin Lorenz
Kai Numssen
Original Assignee
Spinner Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Spinner Gmbh filed Critical Spinner Gmbh
Publication of WO2009036749A1 publication Critical patent/WO2009036749A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P3/00—Waveguides; Transmission lines of the waveguide type
    • H01P3/02—Waveguides; Transmission lines of the waveguide type with two longitudinal conductors
    • H01P3/08—Microstrips; Strip lines

Definitions

  • the invention relates to an arrangement for a loss-minimized influencing of the propagation behavior of a high-frequency signal wave with a substrate having a substrate surface which is coated with a coating of at least one electrically conductive coating material whose electrical conductivity is greater than an assignable to the substrate electrical conductivity with the RF signal wave interacts.
  • RF lines or waveguides are used, preferably coaxial lines, waveguides, stripline lines, microstrip lines.
  • the electromagnetic waves in the form of time- and location-variant electrical and magnetic fields, propagate in the dielectric of the RF line along the metallic line parts, in a conventional coaxial line these are the metallic inner and outer conductors.
  • the electric field penetrates through the surface of the metallic line parts in this and is exponentially attenuated with increasing depth. At a depth ⁇ , called the penetration depth or equivalent conductive layer thickness, the field has dropped to the 1 / e-th part ( «37%).
  • the current density proportionately connected to the electric field strength also decreases exponentially with increasing depth, so that the electric current flows with increasing frequency only in a thin "skin" on the surface of the metallic conduit parts
  • the penetration depth or equivalent guide layer thickness ⁇ is frequency- and material-dependent, in particular, the permeability ⁇ r and the
  • metals of the highest possible electrical conductivity such as gold or silver
  • the metal layer applied for this purpose usually has a layer thickness of at least 3 ⁇ , so that at a depth of 3 ⁇ the penetrating field abates to about 5% and thus the majority of the current is conducted in the metal layer of high electrical conductivity.
  • the penetration depth ⁇ would be about 2 ⁇ m when using a silver coating, i. when applying a layer thickness of 3 ⁇ , a silver layer of 6 microns is applied. It is obvious that due to the considerable cost of silver, the measure poses a high cost factor in the production of such RF signal waveguides.
  • the object of the present invention is to reduce losses in the line-connected RF signal wave transmission with the least possible material and cost.
  • an arrangement for a loss-minimized influencing of the propagation behavior of an RF signal wave with a substrate having a substrate surface which is coated with at least one coating of at least one electrically conductive coating material whose characteristic impedance Zi is smaller than a characteristic impedance Z assignable to the substrate s , and with which the RF signal wave interacts, in that the at least one coating material has a layer thickness d corresponding to the following relationship:
  • ⁇ x ⁇ ⁇ ⁇ ⁇ : wavelength of the RF signal wave within the coating
  • ⁇ r i: permeability of the coating material
  • OY electrical conductivity of the coating material
  • d means that layer thickness deviations of the absolute value ⁇ / 4 of ⁇ 20%, preferably ⁇ 10%, appear acceptable.
  • the proportion of the reflected wave is higher in a band-limited area than in comparable prior art surfaces.
  • the losses in the conduction-guided routing of RF signal waves along a signal line designed in accordance with the solution also decrease.
  • This effect which is very advantageous for the HF signal transmission, can be described by specifying an "effective conductivity" which, in a band-limited area, shows an elevation compared to the conductivity of the coating material itself.
  • the coating material of the ⁇ / 4 layer has an electrical conductivity which is greater than 40MS / m.
  • a further preferred embodiment provides for a coating comprising at least two layers, each with different coating materials, wherein the characteristic impedance Z 1 attributable to the at least two coating materials does not differ as much as possible from each other and for the sum of the quotients of the layer thicknesses dj and in each case the layers
  • index i identifies parameters belonging to the i-th layer.
  • the E-wave can propagate without significant reflection at the interfaces.
  • the total phase rotation experienced by the E-wave when passing through these layers should be approximately 90 °, so that then, after the reflection at the interface with the substrate or another layer with large characteristic impedance again a constructive interference with the at the foremost interface reflected wave yields.
  • This arrangement may be advantageous in cases where intermediate layers are required for chemical or physical reasons.
  • the substrate surface is coated with two coatings, a first and a second coating.
  • the second coating which is applied directly to the substrate surface, has a characteristic impedance Z 2 which is greater than the characteristic impedance Z 1 of the first coating and which is greater than a characteristic impedance Z s that can be assigned to the substrate.
  • the first and the second coating are each formed as ⁇ / 4 layers, wherein the ⁇ / 4 layers may have different layer thicknesses depending on the selected material.
  • the substrate surface is coated with three coatings, first, second and third coatings.
  • the third coating is located directly on the substrate surface and the second coating is arranged between the first and the third coating.
  • the second coating has a characteristic impedance Z 2 , which is greater than the characteristic impedance Zi, which can be assigned to the first coating, and which is greater than a characteristic impedance Z 3 that can be assigned to the third coating.
  • the characteristic impedances Zi and Z 3 are smaller than a characteristic impedance Zs attributable to the substrate.
  • the three coatings are each formed as ⁇ / 4 layers, wherein the ⁇ / 4 layers can have different layer thicknesses depending on the material.
  • Characteristic impedance Zi of the first coating with Z 1 I - - - - at least to
  • a factor 10 is smaller than a characteristic impedance of an adjacent material.
  • the reflection at the boundary layer between the first coating and a second coating or a substrate is particularly high and takes place with a phase shift of approximately 0 °. Accordingly, there is a particularly significant increase in the effective conductivity.
  • Second layer of poorly conductive metal b) second layer of high-permeability, soft magnetic metal
  • the at least one coating material is silver, especially since silver has a particularly high electrical conductivity.
  • the substrate consists of a soft magnetic material.
  • the impedance jump at the interface between the electrically conductive coating and the substrate is particularly high, especially as the relative permeability ⁇ r of a soft magnetic material is particularly large
  • the substrate consists of AIMgSiI or Al 2 O 3 .
  • a further preferred arrangement is characterized in that the substrate consists of a dielectric or at least has a region of a dielectric material located directly under the coating.
  • the impedance discontinuity at the interface between coating and substrate is also particularly high in this embodiment.
  • Another embodiment provides a substrate on which a ⁇ / 4 layer of nickel is deposited.
  • a further coating consisting of a copper layer and a silver layer, which together form a ⁇ / 4 layer, is applied to the nickel layer in such a way that the copper layer contacts the nickel layer.
  • the copper layer is advantageous for electroplating reasons.
  • the substrate is first coated with a ⁇ / 4 layer of silver, then with a ⁇ / 4 layer of nickel and finally again with a ⁇ / 4 layer of silver.
  • the nickel layer results in each case large impedance jumps at the interfaces to the two silver coatings, which in each case has an advantageous effect on the reflection and the desired phase rotations at the interfaces.
  • Arrangements according to the invention in the various embodiments are used for the largely lossless conduction-dependent influencing of RF signal waves.
  • surfaces of lines in particular coaxial, stripline, coplanar, microstrip or hollow lines are at least partially provided with the at least one coating material.
  • the electrically conductive metal parts present in the individual types of lines represent the abovementioned substrates which are to be provided with the coating according to the invention on their surface.
  • surfaces of connectors or plug units that interact with the RF signal wave may also be at least partially provided with the at least one coating.
  • surfaces of filters, resonators, terminations, couplers are at least partially provided with the at least one coating material.
  • surfaces of antennas may be at least partially provided with the at least one coating material.
  • Fig. 1 amplitude curve of the electric field strength when hitting a conductive surface according to the prior art
  • Fig. 2 amplitude profile of the electric field strength when hitting a conductive surface according to the invention
  • Fig. 3 Course of the effective electrical conductivity
  • Fig. 1 shows a schematized coating arrangement according to the prior art.
  • a highly conductive layer 2 for example silver
  • a substrate 5 with a layer thickness of 3 ⁇ .
  • a dielectric 1 for example, air
  • E-wave see arrow
  • a rest Part penetrates into the electrically conductive material 2 and passes through this.
  • the layer 2 transmitting wave component is attenuated exponentially with continuous phase rotation.
  • the attenuation measure corresponds to the equivalent conductive layer thickness ⁇ .
  • the amplitude of the E-wave entering the layer 2 has already subsided to about 5%.
  • the layer structure shown in Fig. 2 corresponds to the layer combination for a waveguide, i.
  • Layer 1 corresponds to the dielectric and layers 2 and 5 to the coated metal conductor part.
  • the non-reflected part of the E-WeIIe undergoes a phase shift by 90 ° while passing through the conductive ⁇ / 4 layer 2 and additionally an attenuation.
  • this portion of the E-WeIIe again undergoes a partial reflection on the back of the layer 2; but this time under an O ° phase shift, since the impedance of the coating material 2 is smaller than that of the substrate material 5.
  • the returning wave produced by the reflection undergoes again a 90 ° delay on the second passage through the ⁇ / 4 layer 2 and a further attenuation before it re-enters the dielectric 1 of the waveguide.
  • High-frequency cables and assemblies which are equipped with such a surface according to the invention, therefore, have a lower attenuation and a higher quality than those whose surfaces are coated according to the prior art.
  • the particular advantage is also in the lower consumption of expensive coating materials such as the precious metal silver.
  • Fig. 3 is a graph showing the effective conductivity of coated surfaces as a function of frequency.
  • the dashed line shows the previously assumed course. At low frequencies, where the current propagates in both the poorly conducting substrate material and the highly conductive coating material, there is little effective conductivity of the overall assembly. As the frequency increases, the proportion of current flowing due to the skin effect in the highly conductive coating increases. This causes an increase in effective conductivity, which approaches the conductivity of the coating material for high frequencies at which the current predominantly flows in the coating.
  • the solid line indicates the course of a determined conductivity of a surface coated according to the invention as a function of the frequency of the RF signal wave, taking into account the reflections at the various interfaces.
  • the elevation can be optimized.
  • the reflection at the front of the layer is as large as possible, if this layer is conducting as well as possible, for example silver.
  • the reflection at the rear side of the first layer becomes as large as possible if the impedance jump to the second layer, for example the substrate or a subsequent layer in arrangements with several ⁇ / 4 layers, is particularly large.
  • Fig. 4 shows an arrangement with several ⁇ / 4 layers to further increase the effective conductivity.
  • This further increase is achieved in that the wave reflected at the interface 1-2 is structurally superimposed not only by a wave reflected at the interface 2-3, but also by a wave reflected at the interface 3-4.
  • the successive layers advantageously have alternately high and low impedance, so that the proportion of reflected waves is as high as possible and the phase rotations occurring are as ideal as possible.
  • This principle according to which the waves reflected at the interfaces of the ⁇ / 4 layers are constructively superimposed, can be applied to any number of ⁇ / 4 layers.
  • the effective conductivity can be significantly improved. Initial tests have already achieved improved values of up to 18%. This corresponds to a 9% improvement in quality or damping. Especially at low frequencies, the silver plating is surprisingly better than previously thought due to the reflection on the silver backside. By reducing the silver layer thickness from 3 ⁇ to ⁇ / 2 * ⁇ , what corresponds to a ⁇ / 4 layer, can save almost half of the silver.
  • the case of “silver on soft magnet (transformer sheet)" could be considered as a replacement for the previously used copper sheet resonators.
  • the case of "silver on insulator” can be particularly well applied to the metallized plastic filters.

Landscapes

  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)

Abstract

L'invention concerne un agencement permettant d'agir avec un minimum de pertes sur le comportement de diffusion d'une onde de signal HF. Ledit agencement comporte un substrat présentant une surface de substrat qui est revêtue d'au moins un premier revêtement constitué d'au moins un matériau de revêtement électriquement conducteur dont l'impédance caractéristique Z1 est inférieure à une impédance caractéristique Zs associable au substrat et avec lequel l'onde de signal HF entre en interaction. Selon l'invention, le ou les revêtements présentent une épaisseur de couche d qui satisfait à la relation suivante : d ≈ p/2 • δ ≈ λ/4, δ étant représenté par la formule (I), dans laquelle μ1 est égal à μ0•μr1, μ0 représente la constante de champ magnétique, μr1 représente la perméabilité relative du matériau de revêtement, σ1 représente la conductivité du matériau de revêtement, ω est égal à 2pf, f représentant la fréquence de l'onde de signal HF, et λ représente la longueur d'onde de l'onde de signal HF à l'intérieur du revêtement.
PCT/DE2008/001557 2007-09-21 2008-09-17 Agencement permettant d'agir avec un minimum de pertes sur le comportement de diffusion d'une onde de signal hf WO2009036749A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007045234.0 2007-09-21
DE200710045234 DE102007045234A1 (de) 2007-09-21 2007-09-21 Anordnung für eine verlustminimierte Beeinflussung des Ausbreitungsverhaltens einer HF-Signalwelle

Publications (1)

Publication Number Publication Date
WO2009036749A1 true WO2009036749A1 (fr) 2009-03-26

Family

ID=40039711

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2008/001557 WO2009036749A1 (fr) 2007-09-21 2008-09-17 Agencement permettant d'agir avec un minimum de pertes sur le comportement de diffusion d'une onde de signal hf

Country Status (2)

Country Link
DE (1) DE102007045234A1 (fr)
WO (1) WO2009036749A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015201773A1 (de) 2015-02-02 2016-08-04 Ihp Gmbh-Innovations For High Performance Microelectronics / Leibniz-Institut Für Innovative Mikroelektronik Inhomogene Übertragungsleitung zur positionsaufgelösten Permittivitätsbestimmung

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4964738A (en) * 1988-11-14 1990-10-23 Lindsay David S Electrical conductor of high magnetic permeability material for audio circuits
JPH07336113A (ja) * 1994-06-03 1995-12-22 Murata Mfg Co Ltd 高周波電極及び高周波伝送線路
EP0786822A2 (fr) * 1996-01-23 1997-07-30 Murata Manufacturing Co., Ltd. Electrode multicouche à couches minces, résonateur haute fréquence, et ligne de transmission haute fréquence
US20010033209A1 (en) * 2000-04-21 2001-10-25 Yasunori Ogawa Coplanar transmission line
US20030062974A1 (en) * 2001-09-27 2003-04-03 Seiji Hidaka Resonator, filter, duplexer, and high-frequency circuit apparatus

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3391271B2 (ja) * 1998-09-01 2003-03-31 株式会社村田製作所 高周波用低損失電極

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4964738A (en) * 1988-11-14 1990-10-23 Lindsay David S Electrical conductor of high magnetic permeability material for audio circuits
JPH07336113A (ja) * 1994-06-03 1995-12-22 Murata Mfg Co Ltd 高周波電極及び高周波伝送線路
EP0786822A2 (fr) * 1996-01-23 1997-07-30 Murata Manufacturing Co., Ltd. Electrode multicouche à couches minces, résonateur haute fréquence, et ligne de transmission haute fréquence
US20010033209A1 (en) * 2000-04-21 2001-10-25 Yasunori Ogawa Coplanar transmission line
US20030062974A1 (en) * 2001-09-27 2003-04-03 Seiji Hidaka Resonator, filter, duplexer, and high-frequency circuit apparatus

Also Published As

Publication number Publication date
DE102007045234A1 (de) 2009-04-09

Similar Documents

Publication Publication Date Title
EP3134905B1 (fr) Câble de données
DE69419088T2 (de) Hochfrequenzelement in Streifenleitungsbauart
DE102014214726B3 (de) Datenkabel für High-Speed Datenübertragungen
EP3132660A1 (fr) Dispositif et procédé de transmission de signaux de données différentiels
DE102014223119B4 (de) Datenkabel sowie Verfahren zur Herstellung eines Datenkabels
DE2403056A1 (de) Einstellbare verzoegerungsleitung und verfahren zu deren betrieb
DE102017201416A1 (de) Differenzübertragungsleitung mit gemeinsamer-modus-unterdrückung
EP1655800A1 (fr) Ligne hyperfréquence planaire avec changement de direction
DE102007046351A1 (de) Hochfrequenzplatine, die einen Übertragungsmodus zur Befestigung einer Halbleitervorrichtung wandelt
EP2489095A1 (fr) Coupleur d'antenne
DE102012205243A1 (de) Richtkoppler mit geringer elektrischer Kopplung
BE1026802B1 (de) Steckverbinder
WO2009036749A1 (fr) Agencement permettant d'agir avec un minimum de pertes sur le comportement de diffusion d'une onde de signal hf
WO2013017397A1 (fr) Coupleur directif séparé de manière galvanique
EP3163688B1 (fr) Élément de connexion destiné à connecter un premier câble de données à un second câble de données et ligne de données comportant un tel élément de connexion.
EP2438645B1 (fr) Coupleur vers avant à conducteurs plats
EP2068391A2 (fr) Dispositif doté d'une ligne à bande croisée
EP2137787B1 (fr) Séparateur de tension continue
DE112014003346T5 (de) Anschluss-Verbindungsstruktur
DE112017007001T5 (de) Basisplatinenmodul
DE102013216929A1 (de) Leitungsüberbrückung für zwei Mikrostreifenleitungen und Verfahren
DE1591559C3 (de) Hochfrequenzleitungsverbindung
DE767806C (de) Aus duennen Einzelleitern zusammengesetzter Hochfrequenzleiter
EP2438646B1 (fr) Coupleur de mesure à ruban conducteur
DE10231688A1 (de) Übergang zwischen einem Hohlleiter einer Microstrip-Leitung

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 08832295

Country of ref document: EP

Kind code of ref document: A1

122 Ep: pct application non-entry in european phase

Ref document number: 08832295

Country of ref document: EP

Kind code of ref document: A1