EP2605333A1 - Metal structure for electromagnetic coupling with an antenna element of a communication terminal - Google Patents

Metal structure for electromagnetic coupling with an antenna element of a communication terminal Download PDF

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Publication number
EP2605333A1
EP2605333A1 EP12007764.9A EP12007764A EP2605333A1 EP 2605333 A1 EP2605333 A1 EP 2605333A1 EP 12007764 A EP12007764 A EP 12007764A EP 2605333 A1 EP2605333 A1 EP 2605333A1
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EP
European Patent Office
Prior art keywords
metal structure
structure according
structural element
transformer
feed line
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EP12007764.9A
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German (de)
French (fr)
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EP2605333B1 (en
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Markus Neumann
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Paragon AG
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Paragon AG
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/40—Element having extended radiating surface
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/27—Adaptation for use in or on movable bodies
    • H01Q1/32—Adaptation for use in or on road or rail vehicles
    • H01Q1/325—Adaptation for use in or on road or rail vehicles characterised by the location of the antenna on the vehicle
    • H01Q1/3291—Adaptation for use in or on road or rail vehicles characterised by the location of the antenna on the vehicle mounted in or on other locations inside the vehicle or vehicle body

Definitions

  • the invention relates to a metal structure for electromagnetic coupling with an antenna element of a communication terminal in at least three communication bands, preferably in GSM900, GSM1800 and UMTS2100.
  • the metal structure according to the invention is to be used in the field of mobile communication, in particular for the operation of mobile telephones with external external antennas.
  • the operation of such mobile phones in motor vehicles is problematic due to shielding effects of motor vehicle bodies in terms of connection quality, occurring in the motor vehicle interior high field strengths and rapid battery discharges of mobile phones.
  • antenna coupler for wireless connection to the mobile phone, wherein in addition, if necessary, a compensation amplifier and an external antenna is provided.
  • Such antenna couplers are usually dedicated for a particular mobile phone or a particular type of Provided mobile phones. Essential characteristics of such antenna couplers are the coupling loss and the bandwidth.
  • the present invention seeks to provide an on the one hand in comparison to the prior art broadband and on the other hand technically-constructive little expensive and therefore cost metal structure for electromagnetic coupling, both the type or design of the communication terminal as well as from the position of the communication terminal on or above the metal structure is largely independent.
  • the metal structure has a first and a second structural element such that the longitudinal extent of the first structural element corresponds approximately to the width extent of the first structural element, such that the longitudinal extent and the width extent of the first structural element approximate the longitudinal extent or the width extent of the second structural element Structural element correspond, and that the length expansions and the width expansions of the first and the second structural element about one quarter of the effective therein wavelength of an average of at least two, preferably three, corresponding frequency ranges of the three communication bands.
  • the metal structure according to the invention can be used as a universal antenna coupler or as a universal broadband antenna. Areas of application may be, for example, the automotive industry, the rail industry, the aircraft industry and the entertainment electronics industry. In the last Case, the metal structure according to the invention can be used in the connection of game consoles to the Internet via mobile phone or TV web access.
  • the metal structure according to the invention can be, for example, part of a universal coupling shell for mobile communication terminals.
  • the length extent of the slots may correspond to approximately one quarter of the effective wavelength in the slot of an average of at least two, preferably three, corresponding frequency ranges of the three communication bands.
  • the slots are perpendicular to their longitudinal direction at a constant distance from each other, which corresponds to about one quarter of the effective wavelength in the slot of the average from the corresponding frequency range of the communication band with the highest operating frequency, preferably UMTS2100.
  • one of the two structural elements is interrupted by a feed line of the metal structure.
  • a lambda / 4-transformer can be provided in a connection section between a feed point and a connection point of the feed line or the metal structure.
  • the lambda / 4-transformer To design this lambda / 4-transformer with a high bandwidth if possible, is the lambda / 4-transformer according to an advantageous embodiment, multi-stage, preferably designed as a double lambda / 4-transformer.
  • the necessary impedance properties are achieved by defined distances of the feed line to the second structure element of the metal structure which is interrupted by the impedance transformation between feed point and connection point of the feed line through the lambda / 4 transformer integrated in the feed line is realized in cooperation with integrated by distance variations impedance jumps.
  • an expedient two-stage embodiment of the lambda / 4 transformer has the advantage that a high bandwidth can be achieved for the metal structure with a comparatively low technical design effort.
  • an effective transformation length of a transformation element of the lambda / 4 transformer corresponds to approximately one quarter of an average of the wavelength effective therein from at least two, preferably all, corresponding frequencies of the communication bands used.
  • the lambda / 4 transformer can be formed as a "coplanar waveguide" transformer, wherein the feed line has a constant width and necessary impedance jumps can be realized by means of a distance variation between the feed line and interrupted by the feed line structure element of the metal structure.
  • the metal structure is preferably mirror-symmetrical to a preferably parallel to the feed line symmetry line formed.
  • the metal structure can be realized as a copper structure on a carrier material, as a metallized carrier foil made of plastic or as a contoured sheet metal part.
  • the two structural elements of the metal structure are designed to be complementary.
  • connection point of the feed line may advantageously be provided a coaxial plug or screw connection.
  • the single figure shows an embodiment of a metal structure according to the invention for electromagnetic coupling with an antenna element of a communication device in at least three communication bands in principle.
  • An embodiment of a metal structure 1 according to the invention shown in the single figure is used for electromagnetic coupling with an antenna element of a communication terminal not shown in the figure.
  • the electromagnetic coupling is performed in at least three communication bands. These are preferably the communication bands GSM900, GSM1800 and UMTS2100.
  • the metal structure 1 can for example be part of a provided in a motor vehicle tray for a mobile phone be, this mobile phone can then be connected by means of the metal structure 1 to a motor vehicle-side external external antenna.
  • this has a first structural element 2, which is shown on the left in the single figure, and a second structural element 3, which is shown on the right in the figure.
  • the two structural elements 2, 3 sit on a suitable carrier material 4.
  • the first structural element 2 shown on the left in the figure has a width extension L1 and a longitudinal extent L2 which corresponds approximately to the width L1.
  • the second structural element 3 shown on the right in the figure also has the width extension L1 and a longitudinal extent L3 that approximately corresponds to the longitudinal extent L2 of the first structural element 2 and thus also to the width extent L1 of the first structural element 2.
  • the metal structure 1 consisting of the two structural elements 2, 3 can, for example, be applied to the carrier material 4 as a copper-structured printed circuit board.
  • two slots 5 are formed in the first structural element 2 of the metal structure 1 and run parallel to one another and to the longitudinal extent L2 of the first structural element. Both slots 5 are closed at their second structural element 3 facing end portions by means of a respective slot web 12 and are thus formed as a total within the first structural element 2 extending closed slots 5.
  • the illustrated in the Embodiment two slots 5 have due to their parallelism to each other a constant distance L4. Furthermore, the two slots 5 have the same length extension L5, which is less than the longitudinal extent L2 of the first structural element, since both slots 5 are yes closed.
  • slot extensions 6 are provided in the first structural element, which extend to the outer contour of the first structural element 2 of the metal structure 1.
  • the longitudinal extent L5 of the slots 5 corresponds to approximately one quarter of the effective wavelength in the slot 5 of an average of three corresponding frequency ranges of the three communication bands.
  • the distance L4 between the two slots 5 corresponds to approximately one quarter of the effective wavelength in the slot of the mean value from the corresponding frequency range of the communication band with the highest operating frequency, in the illustrated embodiment UMTS2100.
  • the second structural element 3 of the metal structure 1 is interrupted by a feed line 9.
  • a feed point 7 of the metal structure 1 is connected to a connection point 10.
  • the impedance transformation between the feed point 7 and the connection point 10 of the metal structure 1 takes place by means of a double or two-stage lambda / 4 transformer 8 in the exemplary embodiment shown.
  • This two-part lambda / 4 transformer gate 8 is integrated in the feed line 9, essentially in the Area of the opening of the second structural element 3 by means of the feed line 9.
  • the required impedance properties of the double lambda / 4-transformer 8 are achieved by defined distances of the feed line 9 to the perforated second structural element 3 of the metal structure 1.
  • the two-stage lambda / 4 transformer 8 in the region of its effective transformation length L6 from the characteristic impedance Z1 and in the region of its effective transformation length L7 of a characteristic impedance Z2.
  • the effective transformation length L6 associated with the characteristic impedance Z1 corresponds to the effective transformation length L7 associated with the characteristic impedance Z2.
  • the effective transformation lengths L6 and L7, respectively, of the two transformation elements of the ⁇ / 4 transformer 8 correspond to approximately one quarter of an average value of the wavelength effective therein from all corresponding frequencies of the communication bands used.
  • the characteristic impedances Z1 and Z2 of the two-stage lambda / 4-transformer 8 are realized by a distance variation 13 of the distance between the feed line 9 on the one hand and the broken through this second structural element 3 on the other hand, wherein the feed line 9 has a constant width.
  • the two-stage lambda / 4 transformer 8 is designed as a "coplanar waveguide" transformer.
  • the metal structure 1 is formed with its structural elements 2, 3 mirror-symmetrical to a line of symmetry 11, wherein the line of symmetry 11 extends parallel to the feed line 9.
  • the metal structure 1 can be realized as a copper structure on the carrier material 4, as a metallized carrier foil made of plastic or as a contoured sheet metal part.
  • the two structural elements 2, 3 of the metal structure 1 may be complementary to each other.
  • connection point 10 of the feed line 9 of the metal structure 1 may be provided a coaxial plug or screw connection.

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Abstract

The structure (1) has a structural element (2) whose length extension (L2) corresponds to a width extension (L1) of the structural element. The length extension and the width extension of the structural element correspond to another length extension (L3) and/or the width extension of another structural element (3). The length extensions and the width extension of the structural elements correspond to quarters of wavelength of a mean value in corresponding frequency ranges of three communication bands. The structural elements are designed as closed slots (5). The copper structure is made of support material, a metallized carrier film that is made of plastic or an outlined sheet metal part. The structural elements are designed as copper-structured circuit boards.

Description

Die Erfindung bezieht sich auf eine Metallstruktur zur elektromagnetischen Kopplung mit einem Antennenelement eines Kommunikationsendgeräts in zumindest drei Kommunikationsbändern, vorzugsweise in GSM900, GSM1800 und UMTS2100. Die erfindungsgemäße Metallstruktur soll auf dem Gebiet der Mobilkommunikation, insbesondere zum Betrieb von Mobiltelefonen mit externen Außenantennen zum Einsatz kommen. Der Betrieb derartiger Mobiltelefone in Kraftfahrzeugen ist aufgrund abschirmender Wirkungen von Kraftfahrzeugkarosserien hinsichtlich der Verbindungsqualität, der im Kraftfahrzeuginnenraum auftretenden hohen Feldstärken und schnellen Akkuentladungen von Mobiltelefonen problematisch.The invention relates to a metal structure for electromagnetic coupling with an antenna element of a communication terminal in at least three communication bands, preferably in GSM900, GSM1800 and UMTS2100. The metal structure according to the invention is to be used in the field of mobile communication, in particular for the operation of mobile telephones with external external antennas. The operation of such mobile phones in motor vehicles is problematic due to shielding effects of motor vehicle bodies in terms of connection quality, occurring in the motor vehicle interior high field strengths and rapid battery discharges of mobile phones.

Aus dem Stand der Technik sind Vorrichtungen bekannt, bei denen ein Antennenkoppler zur drahtlosen Verbindung mit dem Mobiltelefon vorgesehen ist, wobei darüber hinaus ggf. ein Kompensationsverstärker und eine Außenantenne vorgesehen ist. Derartige Antennenkoppler sind üblicherweise dezidiert für ein bestimmtes Mobiltelefon oder eine bestimmte Bauart von Mobiltelefonen vorgesehen. Wesentliche Kenngrößen derartiger Antennenkoppler sind die Koppeldämpfung und die Bandbreite.Devices are known from the prior art, in which an antenna coupler is provided for wireless connection to the mobile phone, wherein in addition, if necessary, a compensation amplifier and an external antenna is provided. Such antenna couplers are usually dedicated for a particular mobile phone or a particular type of Provided mobile phones. Essential characteristics of such antenna couplers are the coupling loss and the bandwidth.

Ausgehend von dem vorstehend geschilderten Stand der Technik liegt der Erfindung die Aufgabe zugrunde, eine einerseits im Vergleich zum Stand der Technik breitbandigere und andererseits technisch-konstruktiv wenig aufwändige und damit kostengünstige Metallstruktur zur elektromagnetischen Kopplung anzugeben, die sowohl vom Typ bzw. der Bauart des Kommunikationsendgeräts als auch von der Position des Kommunikationsendgeräts an bzw. über der Metallstruktur weitestgehend unabhängig ist.Based on the above-described prior art, the present invention seeks to provide an on the one hand in comparison to the prior art broadband and on the other hand technically-constructive little expensive and therefore cost metal structure for electromagnetic coupling, both the type or design of the communication terminal as well as from the position of the communication terminal on or above the metal structure is largely independent.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass die Metallstruktur ein erstes und ein zweites Strukturelement aufweist, dass die Längenausdehnung des ersten Strukturelements etwa der Breitenausdehnung des ersten Strukturelements entspricht, dass die Längenausdehnung und die Breitenausdehnung des ersten Strukturelements etwa der Längenausdehnung bzw. der Breitenausdehnung des zweiten Strukturelements entsprechen, und dass die Längenausdehnungen und die Breitausdehnungen des ersten und des zweiten Strukturelements etwa einem Viertel der darin wirksamen Wellenlänge eines Mittelwerts aus zumindest zwei, vorzugsweise drei, korrespondierenden Frequenzbereichen der drei Kommunikationsbänder entsprechen.This object is achieved in accordance with the invention in that the metal structure has a first and a second structural element such that the longitudinal extent of the first structural element corresponds approximately to the width extent of the first structural element, such that the longitudinal extent and the width extent of the first structural element approximate the longitudinal extent or the width extent of the second structural element Structural element correspond, and that the length expansions and the width expansions of the first and the second structural element about one quarter of the effective therein wavelength of an average of at least two, preferably three, corresponding frequency ranges of the three communication bands.

Die erfindungsgemäße Metallstruktur kann als universeller Antennenkoppler bzw. als universelle Breitbandantenne angewendet werden. Anwendungsgebiet kann beispielsweise die Kraftfahrzeugindustrie, die Bahnindustrie, die Flugzeugindustrie und die Unterhaltungselektronikindustrie sein. Im letzten Fall kann die erfindungsgemäße Metallstruktur bei der Anbindung von Spielekonsolen ans Internet über Mobiltelefon bzw. beim TV-Webzugang eingesetzt werden. Die erfindungsgemäße Metallstruktur kann beispielsweise Bestandteil einer universellen Koppelschale für Mobilkommunikationsendgeräte sein.The metal structure according to the invention can be used as a universal antenna coupler or as a universal broadband antenna. Areas of application may be, for example, the automotive industry, the rail industry, the aircraft industry and the entertainment electronics industry. In the last Case, the metal structure according to the invention can be used in the connection of game consoles to the Internet via mobile phone or TV web access. The metal structure according to the invention can be, for example, part of a universal coupling shell for mobile communication terminals.

Um die Breitbandigkeit der Metallstruktur zu erhöhen, ist es vorteilhaft, wenn in zumindest einem Strukturelement vorzugsweise geschlossene Schlitze ausgebildet sind. Hierbei kann die Längenausdehnung der Schlitze etwa einem Viertel der wirksamen Wellenlänge im Schlitz eines Mittelwerts aus zumindest zwei, vorzugsweise drei, korrespondierenden Frequenzbereichen der drei Kommunikationsbänder entsprechen. Vorteilhaft weisen die Schlitze senkrecht zu ihrer Längsrichtung einen konstanten Abstand zueinander auf, der etwa einem Viertel der wirksamen Wellenlänge im Schlitz des Mittelwerts aus dem korrespondierenden Frequenzbereich des Kommunikationsbands mit der höchsten Betriebsfrequenz, vorzugsweise UMTS2100, entspricht.In order to increase the broadbandness of the metal structure, it is advantageous if preferably closed slots are formed in at least one structural element. In this case, the length extent of the slots may correspond to approximately one quarter of the effective wavelength in the slot of an average of at least two, preferably three, corresponding frequency ranges of the three communication bands. Advantageously, the slots are perpendicular to their longitudinal direction at a constant distance from each other, which corresponds to about one quarter of the effective wavelength in the slot of the average from the corresponding frequency range of the communication band with the highest operating frequency, preferably UMTS2100.

Bei einer besonders zweckmäßigen Ausführungsform der erfindungsgemäßen Metallstruktur ist eines der beiden Strukturelemente von einer Speiseleitung der Metallstruktur unterbrochen.In a particularly expedient embodiment of the metal structure according to the invention, one of the two structural elements is interrupted by a feed line of the metal structure.

In der Speiseleitung kann in einem Verbindungsabschnitt zwischen einem Speisepunkt und einem Anschlusspunkt der Speiseleitung bzw. der Metallstruktur ein Lambda/4-Transformator vorgesehen sein.In the feed line, a lambda / 4-transformer can be provided in a connection section between a feed point and a connection point of the feed line or the metal structure.

Um diesen Lambda/4-Transformator möglichst mit einer hohen Breitbandigkeit auszugestalten, ist der Lambda/4-Transformator gemäß einer vorteilhaften Ausführungsform mehrstufig, vorzugsweise als Doppel-Lambda/4-Transformator ausgebildet. Bei einer vorteilhaften Ausgestaltung des Lambda/4-Transformators werden die notwendigen Impedanzeigenschaften durch definierte Abstände der Speiseleitung zu dem von dieser durchbrochenen zweiten Strukturelement der Metallstruktur erreicht, wobei die Impedanztransformation zwischen Speisepunkt und Anschlusspunkt der Speiseleitung durch den in die Speiseleitung integrierten Lambda/4-Transformator im Zusammenwirken mit durch Abstandsvariationen integrierten Impedanzsprüngen realisiert wird.To design this lambda / 4-transformer with a high bandwidth if possible, is the lambda / 4-transformer according to an advantageous embodiment, multi-stage, preferably designed as a double lambda / 4-transformer. In an advantageous embodiment of the lambda / 4 transformer, the necessary impedance properties are achieved by defined distances of the feed line to the second structure element of the metal structure which is interrupted by the impedance transformation between feed point and connection point of the feed line through the lambda / 4 transformer integrated in the feed line is realized in cooperation with integrated by distance variations impedance jumps.

Beispielsweise hat eine zweckmäßige zweistufige Ausgestaltung des Lambda/4-Transformators den Vorteil, dass für die Metallstruktur mit einem vergleichsweise geringen technischkonstruktiven Aufwand eine hohe Breitbandigkeit erreicht werden kann.For example, an expedient two-stage embodiment of the lambda / 4 transformer has the advantage that a high bandwidth can be achieved for the metal structure with a comparatively low technical design effort.

Gemäß einer vorteilhaften Ausführungsform entspricht eine wirksame Transformationslänge eines Transformationselements des Lambda/4-Transformators etwa einem Viertel eines Mittelwerts der darin wirksamen Wellenlänge aus zumindest zwei, vorzugsweise allen, korrespondierenden Frequenzen der eingesetzten Kommunikationsbänder.According to an advantageous embodiment, an effective transformation length of a transformation element of the lambda / 4 transformer corresponds to approximately one quarter of an average of the wavelength effective therein from at least two, preferably all, corresponding frequencies of the communication bands used.

In besonders vorteilhafter Weise lässt sich der Lambda/4-Transformator als "Coplanar Waveguides"-Transformator ausbilden, wobei die Speiseleitung eine konstante Breite aufweist und notwendige Impedanzsprünge mittels einer Abstandsvariation zwischen der Speiseleitung und dem von der Speiseleitung unterbrochenen Strukturelement der Metallstruktur realisiert sein können.In a particularly advantageous manner, the lambda / 4 transformer can be formed as a "coplanar waveguide" transformer, wherein the feed line has a constant width and necessary impedance jumps can be realized by means of a distance variation between the feed line and interrupted by the feed line structure element of the metal structure.

Die Metallstruktur ist vorzugsweise spiegelsymmetrisch zu einer vorzugsweise parallel zur Speiseleitung verlaufenden Symmetrielinie ausgebildet.The metal structure is preferably mirror-symmetrical to a preferably parallel to the feed line symmetry line formed.

Des Weiteren kann die Metallstruktur als Kupferstruktur auf einem Trägermaterial, als metallisierte Trägerfolie aus Kunststoff oder als konturiertes Blechteil realisiert sein.Furthermore, the metal structure can be realized as a copper structure on a carrier material, as a metallized carrier foil made of plastic or as a contoured sheet metal part.

Vorteilhaft sind die beiden Strukturelemente der Metallstruktur komplementär ausgestaltet.Advantageously, the two structural elements of the metal structure are designed to be complementary.

Am Anschlusspunkt der Speiseleitung kann vorteilhaft eine koaxiale Steck- oder Schraubverbindung vorgesehen sein.At the connection point of the feed line may advantageously be provided a coaxial plug or screw connection.

Im Folgenden wird die Erfindung anhand einer Ausführungsform unter Bezugnahme auf die Zeichnung näher erläutert, deren einzige Figur ein Ausführungsbeispiel einer erfindungsgemäßen Metallstruktur zur elektromagnetischen Kopplung mit einem Antennenelement eines Kommunikationsgeräts in zumindest drei Kommunikationsbändern prinzipiell zeigt.In the following, the invention will be explained in more detail with reference to an embodiment with reference to the drawing, the single figure shows an embodiment of a metal structure according to the invention for electromagnetic coupling with an antenna element of a communication device in at least three communication bands in principle.

Ein in der einzigen Figur gezeigtes Ausführungsbeispiel einer erfindungsgemäßen Metallstruktur 1 dient der elektromagnetischen Kopplung mit einem Antennenelement eines in der Figur nicht gezeigten Kommunikationsendgeräts. Die elektromagnetische Kopplung wird in zumindest drei Kommunikationsbändern vorgenommen. Hierbei handelt es sich vorzugsweise um die Kommunikationsbänder GSM900, GSM1800 und UMTS2100.An embodiment of a metal structure 1 according to the invention shown in the single figure is used for electromagnetic coupling with an antenna element of a communication terminal not shown in the figure. The electromagnetic coupling is performed in at least three communication bands. These are preferably the communication bands GSM900, GSM1800 and UMTS2100.

Die Metallstruktur 1 kann beispielsweise Bestandteil einer in einem Kraftfahrzeug vorgesehenen Ablage für ein Mobiltelefon sein, wobei dieses Mobiltelefon dann mittels der Metallstruktur 1 an eine kraftfahrzeugseitige externe Außenantenne angeschlossen werden kann.The metal structure 1 can for example be part of a provided in a motor vehicle tray for a mobile phone be, this mobile phone can then be connected by means of the metal structure 1 to a motor vehicle-side external external antenna.

Bei dem in der Figur gezeigten Ausführungsbeispiel der Metallstruktur 1 weist diese ein ersten Strukturelement 2, welches in der einzigen Figur links dargestellt ist, und ein zweites Strukturelement 3 auf, welches in der Figur rechts dargestellt ist. Die beiden Strukturelemente 2, 3 sitzen auf einem geeigneten Trägermaterial 4.In the embodiment of the metal structure 1 shown in the figure, this has a first structural element 2, which is shown on the left in the single figure, and a second structural element 3, which is shown on the right in the figure. The two structural elements 2, 3 sit on a suitable carrier material 4.

Das in der Figur links dargestellte erste Strukturelement 2 hat eine Breitenausdehnung L1 und eine Längenausdehnung L2, die in etwa der Breitenausdehnung L1 entspricht. Das in der Figur rechts dargestellte zweite Strukturelement 3 hat ebenfalls die Breitenausdehnung L1 und eine Längenausdehnung L3, die in etwa der Längenausdehnung L2 des ersten Strukturelements 2 und somit auch der Breitenausdehnung L1 des ersten Strukturelements 2 entspricht.The first structural element 2 shown on the left in the figure has a width extension L1 and a longitudinal extent L2 which corresponds approximately to the width L1. The second structural element 3 shown on the right in the figure also has the width extension L1 and a longitudinal extent L3 that approximately corresponds to the longitudinal extent L2 of the first structural element 2 and thus also to the width extent L1 of the first structural element 2.

Die aus den beiden Strukturelementen 2, 3 bestehende Metallstruktur 1 kann beispielsweise als kupferstrukturierte Leiterplatte auf das Trägermaterial 4 aufgebracht sein.The metal structure 1 consisting of the two structural elements 2, 3 can, for example, be applied to the carrier material 4 as a copper-structured printed circuit board.

Im gezeigten Ausführungsbeispiel sind im ersten Strukturelement 2 der Metallstruktur 1 zwei Schlitze 5 ausgebildet, die parallel zueinander und zur Längenausdehnung L2 des ersten Strukturelements verlaufen. Beide Schlitze 5 sind an ihren dem zweiten Strukturelement 3 zugewandten Endabschnitten mittels jeweils eines Schlitzstegs 12 geschlossen und sind somit insgesamt als innerhalb des ersten Strukturelements 2 verlaufende geschlossene Schlitze 5 ausgebildet. Die im dargestellten Ausführungsbeispiel zwei Schlitze 5 haben aufgrund ihrer Parallelität zueinander einen konstanten Abstand L4. Des Weiteren haben die beiden Schlitze 5 die gleiche Längenausdehnung L5, die geringer ist als die Längenausdehnung L2 des ersten Strukturelements, da beide Schlitze 5 ja geschlossen sind. Jenseits der beiden Schlitzstege 12 sind im ersten Strukturelement 2 Schlitzfortsätze 6 vorgesehen, die sich bis zur Außenkontur des ersten Strukturelements 2 der Metallstruktur 1 erstrecken.In the exemplary embodiment shown, two slots 5 are formed in the first structural element 2 of the metal structure 1 and run parallel to one another and to the longitudinal extent L2 of the first structural element. Both slots 5 are closed at their second structural element 3 facing end portions by means of a respective slot web 12 and are thus formed as a total within the first structural element 2 extending closed slots 5. The illustrated in the Embodiment two slots 5 have due to their parallelism to each other a constant distance L4. Furthermore, the two slots 5 have the same length extension L5, which is less than the longitudinal extent L2 of the first structural element, since both slots 5 are yes closed. Beyond the two slot webs 12 2 slot extensions 6 are provided in the first structural element, which extend to the outer contour of the first structural element 2 of the metal structure 1.

Die Längenausdehnung L5 der Schlitze 5 entspricht etwa einem Viertel der wirksamen Wellenlänge im Schlitz 5 eines Mittelwerts aus drei korrespondierenden Frequenzbereichen der drei Kommunikationsbänder. Der Abstand L4 zwischen den beiden Schlitzen 5 entspricht in etwa einem Viertel der wirksamen Wellenlänge im Schlitz des Mittelwerts aus dem korrespondierenden Frequenzbereich des Kommunikationsbands mit der höchsten Betriebsfrequenz, im dargestellten Ausführungsbeispiel UMTS2100.The longitudinal extent L5 of the slots 5 corresponds to approximately one quarter of the effective wavelength in the slot 5 of an average of three corresponding frequency ranges of the three communication bands. The distance L4 between the two slots 5 corresponds to approximately one quarter of the effective wavelength in the slot of the mean value from the corresponding frequency range of the communication band with the highest operating frequency, in the illustrated embodiment UMTS2100.

Im in der einzigen Figur dargestellten Ausführungsbeispiel ist das zweite Strukturelement 3 der Metallstruktur 1 von einer Speiseleitung 9 unterbrochen. Mittels der Speiseleitung 9 wird ein Speisepunkt 7 der Metallstruktur 1 mit einem Anschlusspunkt 10 verbunden. Die Impedanztransformation zwischen dem Speisepunkt 7 und dem Anschlusspunkt 10 der Metallstruktur 1 erfolgt mittels eines im dargestellten Ausführungsbeispiel doppelten bzw. zweistufigen Lambda/4-Transformator 8. Dieser zweiteilige Lambda/4-Transformtor 8 ist in die Speiseleitung 9 integriert, und zwar im wesentlichen im Bereich der Durchbrechung des zweiten Strukturelements 3 mittels der Speiseleitung 9. Die erforderlichen Impedanzeigenschaften des doppelten Lambda/4-Transformators 8 werden durch definierte Abstände der Speiseleitung 9 zu dem durchbrochenen zweiten Strukturelement 3 der Metallstruktur 1 erreicht.In the embodiment shown in the single figure, the second structural element 3 of the metal structure 1 is interrupted by a feed line 9. By means of the feed line 9, a feed point 7 of the metal structure 1 is connected to a connection point 10. The impedance transformation between the feed point 7 and the connection point 10 of the metal structure 1 takes place by means of a double or two-stage lambda / 4 transformer 8 in the exemplary embodiment shown. This two-part lambda / 4 transformer gate 8 is integrated in the feed line 9, essentially in the Area of the opening of the second structural element 3 by means of the feed line 9. The required impedance properties of the double lambda / 4-transformer 8 are achieved by defined distances of the feed line 9 to the perforated second structural element 3 of the metal structure 1.

Entsprechend besteht der zweistufige Lambda/4-Transformator 8 im Bereich seiner wirksamen Transformationslänge L6 aus der kennzeichnenden Impedanz Z1 und im Bereich seiner wirksamen Transformationslänge L7 aus einer kennzeichnenden Impedanz Z2.Accordingly, the two-stage lambda / 4 transformer 8 in the region of its effective transformation length L6 from the characteristic impedance Z1 and in the region of its effective transformation length L7 of a characteristic impedance Z2.

Im dargestellten Ausführungsbeispiel der Metallstruktur 1 entspricht die wirksame Transformationslänge L6, die der kennzeichnenden Impedanz Z1 zugeordnet ist, der wirksamen Transformationslänge L7, die der kennzeichnenden Impedanz Z2 zugeordnet ist. Die wirksamen Transformationslängen L6 bzw. L7 der beiden Transformationselemente des Lambda/4-Transformators 8 entsprechen etwa einem Viertel eines Mittelwerts der darin wirksamen Wellenlänge aus allen korrespondierenden Frequenzen der eingesetzten Kommunikationsbänder.In the illustrated embodiment of the metal structure 1, the effective transformation length L6 associated with the characteristic impedance Z1 corresponds to the effective transformation length L7 associated with the characteristic impedance Z2. The effective transformation lengths L6 and L7, respectively, of the two transformation elements of the λ / 4 transformer 8 correspond to approximately one quarter of an average value of the wavelength effective therein from all corresponding frequencies of the communication bands used.

Die kennzeichnenden Impedanzen Z1 und Z2 des zweistufigen Lambda/4-Transformators 8 werden durch eine Abstandsvariation 13 des Abstands zwischen der Speiseleitung 9 einerseits und dem von dieser durchbrochenen zweiten Strukturelement 3 andererseits realisiert, wobei die Speiseleitung 9 eine konstante Breite aufweist.The characteristic impedances Z1 and Z2 of the two-stage lambda / 4-transformer 8 are realized by a distance variation 13 of the distance between the feed line 9 on the one hand and the broken through this second structural element 3 on the other hand, wherein the feed line 9 has a constant width.

Der zweistufige Lambda/4-Transformator 8 ist als "Coplanar Waveguides"-Transformator ausgebildet.The two-stage lambda / 4 transformer 8 is designed as a "coplanar waveguide" transformer.

Im dargestellten Ausführungsbeispiel ist die Metallstruktur 1 mit ihren Strukturelementen 2, 3 spiegelsymmetrisch zu einer Symmetrielinie 11 ausgebildet, wobei die Symmetrielinie 11 parallel zur Speiseleitung 9 verläuft.In the illustrated embodiment, the metal structure 1 is formed with its structural elements 2, 3 mirror-symmetrical to a line of symmetry 11, wherein the line of symmetry 11 extends parallel to the feed line 9.

Die Metallstruktur 1 kann als Kupferstruktur auf dem Trägermaterial 4, als metallisierte Trägerfolie aus Kunststoff oder als konturiertes Blechteil realisiert sein.The metal structure 1 can be realized as a copper structure on the carrier material 4, as a metallized carrier foil made of plastic or as a contoured sheet metal part.

Die beiden Strukturelemente 2, 3 der Metallstruktur 1 können zueinander komplementär sein.The two structural elements 2, 3 of the metal structure 1 may be complementary to each other.

Am Anschlusspunkt 10 der Speiseleitung 9 der Metallstruktur 1 kann eine koaxiale Steck- oder Schraubverbindung vorgesehen sein.At the connection point 10 of the feed line 9 of the metal structure 1 may be provided a coaxial plug or screw connection.

Claims (14)

Metallstruktur zur elektromagnetischen Kopplung mit einem Antennenelement eines Kommunikationsendgeräts in zumindest drei Kommunikationsbändern, vorzugsweise in GSM900, GSM1800 und UMTS2100, dadurch gekennzeichnet, dass die Metallstruktur (1) ein erstes (2) und ein zweites Strukturelement (3) aufweist, dass die Längenausdehnung (L2) des ersten Strukturelements (2) etwa der Breitenausdehnung (L1) des ersten Strukturelements (2) entspricht, dass die Längenausdehnung (L2) und die Breitenausdehnung (L1) des ersten Strukturelements (2) etwa der Längenausdehnung (L3) bzw. der Breitenausdehnung (L1) des zweiten Strukturelements (3) entsprechen, und dass die Längenausdehnungen (L2, L3) und die Breitenausdehnungen (L1) des ersten (2) und des zweiten Strukturelements (3) etwa einem Viertel der darin wirksamen Wellenlänge eines Mittelwerts aus zumindest zwei, vorzugsweise drei, korrespondierenden Frequenzbereichen der drei Kommunikationsbänder entsprechen.Metal structure for electromagnetic coupling with an antenna element of a communication terminal in at least three communication bands, preferably in GSM900, GSM1800 and UMTS2100, characterized in that the metal structure (1) has a first (2) and a second structural element (3) that the longitudinal extent (L2 ) of the first structural element (2) corresponds approximately to the width dimension (L1) of the first structural element (2) such that the longitudinal extent (L2) and the width extent (L1) of the first structural element (2) are approximately equal to the longitudinal extent (L3) and the width extent ( L1) of the second structural element (3), and in that the longitudinal extents (L2, L3) and the width extents (L1) of the first (2) and second structural elements (3) are approximately one quarter of the effective wavelength of an average of at least two, preferably correspond to three corresponding frequency ranges of the three communication bands. Metallstruktur nach Anspruch 1, bei der in zumindest einem Strukturelement (2, 3) vorzugsweise geschlossene Schlitze (5) ausgebildet sind.Metal structure according to claim 1, wherein in at least one structural element (2, 3) preferably closed slots (5) are formed. Metallstruktur nach Anspruch 2, bei der die Längenausdehnung (L5) der Schlitze (5) etwa einem Viertel der wirksamen Wellenlänge im Schlitz (5) eines Mittelwerts aus zumindest zwei, vorzugsweise drei, korrespondierenden Frequenzbereichen der drei Kommunikationsbänder entspricht.A metal structure according to claim 2, wherein the longitudinal extent (L5) of the slots (5) corresponds to about one quarter of the effective wavelength in the slot (5) of an average of at least two, preferably three, corresponding frequency ranges of the three communication bands. Metallstruktur nach Anspruch 2 oder 3, bei der die Schlitze (5) senkrecht zu ihrer Längsrichtung einen konstanten Abstand (L4) zueinander aufweisen, der etwa einem Viertel der wirksamen Wellenlänge im Schlitz (5) des Mittelwerts aus dem korrespondierenden Frequenzbereich des Kommunikationsbands mit der höchsten Betriebsfrequenz, vorzugsweise UMTS2100, entspricht.A metal structure according to claim 2 or 3, wherein the slots (5) are perpendicular to their longitudinal direction at a constant distance (L4) to each other which is about one quarter of the effective wavelength in the slot (5) of the mean of the corresponding frequency range of the communication band with the highest Operating frequency, preferably UMTS2100 corresponds. Metallstruktur nach einem der Ansprüche 1 bis 4, bei der eines (3) der beiden Strukturelemente (2, 3) von einer Speiseleitung (9) der Metallstruktur (1) unterbrochen ist.Metal structure according to one of Claims 1 to 4, in which one (3) of the two structural elements (2, 3) is interrupted by a feed line (9) of the metal structure (1). Metallstruktur nach Anspruch 5, die einen Lambda/4-Transformator (8) aufweist, der in der Speiseleitung (9) in einem Verbindungsabschnitt zwischen einem Speisepunkt (7) und einem Anschlusspunkt (10) derselben angeordnet ist.A metal structure according to claim 5, comprising a lambda / 4 transformer (8) disposed in the feed line (9) in a connection portion between a feed point (7) and a terminal point (10) thereof. Metallstruktur nach Anspruch 6, deren Lambda/4-Transformator (8) mehrstufig, vorzugsweise als Doppel-Lambda/4-Transformator (8), ausgebildet ist.Metal structure according to claim 6, whose lambda / 4-transformer (8) is multi-stage, preferably as a double-lambda / 4-transformer (8) is formed. Metallstruktur nach Anspruch 6 oder 7, bei der eine wirksame Transformationslänge (L6) bzw. (L7) eines Transformationselements des Lambda/4-Transformators (8) etwa einem Viertel eines Mittelwerts der darin wirksamen Wellenlänge aus zumindest zwei, vorzugsweise allen, korrespondierenden Frequenzen der eingesetzten Kommunikationsbänder entspricht.A metal structure according to claim 6 or 7, wherein an effective transformation length (L6) and (L7), respectively, of a transformation element of the λ / 4 transformer (8) is about one fourth of an average value of the wavelength effective therein of at least two, preferably all, corresponding frequencies of used communication bands corresponds. Metallstruktur nach einem der Ansprüche 6 bis 8, deren Lambda/4-Transformator (8) als "Coplanar Waveguides"-Transformator ausgebildet ist.Metal structure according to one of claims 6 to 8, whose lambda / 4-transformer (8) is designed as a "coplanar waveguide" transformer. Metallstruktur nach Anspruch 9, bei deren "Coplanar Waveguides"-Transformator (8) die Speiseleitung (9) eine konstante Breite aufweist und notwendige Impedanzsprünge mittels einer Abstandsvariation (13) zwischen der Speiseleitung (9) und dem von der Speiseleitung (9) unterbrochenen Strukturelement (3) der Metallstruktur (1) realisiert sind.Metal structure according to Claim 9, in whose "Coplanar Waveguides" transformer (8) the feed line (9) has a constant width and necessary impedance jumps by means of a distance variation (13) between the feed line (9) and the structure element interrupted by the feed line (9) (3) of the metal structure (1) are realized. Metallstruktur nach einem der Ansprüche 5 bis 10, die spiegelsymmetrisch zu einer vorzugsweise parallel zur Speiseleitung (9) verlaufenden Symmetrielinie (11) ausgebildet ist.Metal structure according to one of claims 5 to 10, which is mirror-symmetrical to a preferably parallel to the feed line (9) extending symmetry line (11) is formed. Metallstruktur nach einem der Ansprüche 1 bis 11, die als Kupferstruktur (1) auf einem Trägermaterial (4), als metallisierte Trägerfolie aus Kunststoff oder als konturiertes Blechteil realisiert ist.Metal structure according to one of claims 1 to 11, which is realized as a copper structure (1) on a carrier material (4), as a metallized carrier foil made of plastic or as a contoured sheet metal part. Metallstruktur nach einem der Ansprüche 1 bis 12, deren zwei Strukturelemente (2, 3) komplementär sind.Metal structure according to one of claims 1 to 12, whose two structural elements (2, 3) are complementary. Metallstruktur nach einem der Ansprüche 6 bis 13, die am Anschlusspunkt (10) der Speiseleitung eine koaxiale Steck- oder Schraubverbindung aufweist.Metal structure according to one of claims 6 to 13, which has a coaxial plug or screw connection at the connection point (10) of the feed line.
EP12007764.9A 2011-12-14 2012-11-16 Metal structure for electromagnetic coupling with an antenna element of a communication terminal Not-in-force EP2605333B1 (en)

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