WO2003015210A1 - Multi-band radio antenna - Google Patents

Multi-band radio antenna Download PDF

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Publication number
WO2003015210A1
WO2003015210A1 PCT/DE2002/002841 DE0202841W WO03015210A1 WO 2003015210 A1 WO2003015210 A1 WO 2003015210A1 DE 0202841 W DE0202841 W DE 0202841W WO 03015210 A1 WO03015210 A1 WO 03015210A1
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WO
WIPO (PCT)
Prior art keywords
switching means
band radio
radio antenna
antenna
antenna according
Prior art date
Application number
PCT/DE2002/002841
Other languages
German (de)
French (fr)
Inventor
Peter Nevermann
Sheng-Gen Pan
Original Assignee
Siemens Aktiengesellschaft
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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO2003015210A1 publication Critical patent/WO2003015210A1/en

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Classifications

    • 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
    • H01Q9/06—Details
    • H01Q9/14—Length of element or elements adjustable
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
    • 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
    • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
    • H01Q9/0421—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with a shorting wall or a shorting pin at one end of the element
    • 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
    • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
    • H01Q9/0442—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with particular tuning means

Definitions

  • the invention relates to a multi-band radio antenna according to the preamble of claim 1, which is particularly suitable and provided for use in mobile radio terminals.
  • multi-band radio antenna is understood below to mean an antenna arrangement which, in addition to the antenna in the narrower sense, may also include matching or connecting means.
  • EP 0 667 684 AI describes optimization options for the separation of transmit and receive signals in a mobile radio terminal on the basis of an integrated filter / switch arrangement.
  • An essential design requirement of multi-band radio antennas consists in realizing the smallest possible reflection factor S ⁇ x with an impedance close to 50 0 real in the frequency bands to be “operated” by the antenna.
  • a typical course of the m Sn value m as a function of the frequency in a mobile radio transmission / reception antenna can be seen, for example, in FIG. 1.
  • the course for an antenna structure with a relatively large volume is shown with a dotted line and with a small triangle as an identification drawing, and the course for an antenna with a relatively small volume is shown with a dashed line and circles.
  • the bandwidth is significantly lower with the clamp-volume antenna.
  • the integrated antennas currently mainly used, namely the patch and PIF antennas the bandwidth is mainly dependent on the volume of the antenna. Thinner and thus reduced-volume antennas have smaller bandwidths.
  • the invention is in view of the above Anfor ⁇ ments and connection based on the object to provide an improved multi-band radio antenna system even at Reducing ⁇ volume relevant transmit and receive bands equally well served.
  • the invention includes the basic idea of remedying a bandwidth that has become insufficiently small due to volume reduction by shifting the S_ curve between the transmission and reception processes in such a way that the frequency band valid for the respective process is just sufficiently covered by the respective S curve, i , H. lies completely in the curve minimum. This is done by switching the antenna characteristics.
  • a transmission / reception changeover in one of the frequency bands to be operated may be sufficient or a changeover in both or all frequency bands may be red.
  • the first case is shown in FIG. 2, where the bandwidth of the antenna in the GSM900 range is so large that both the transmission band and the reception band lie within the curve minimum. No switching of the antenna characteristics is required for this area. However, is to realize that in GSMl ⁇ OO area the technicians ⁇ nenbandbreite totally inadequate to cover both the transmitter as well as the reception band would. A switchover is therefore carried out here, as a result of which either the curve of the S. ⁇ curve shown by the dashed line or the double-dashed line takes effect. Both the GSM-1800 transmit band and the GSM 1800 reception band lies completely within the respective associated curve minimum, that is, the antenna has both the transmitting and the required Bandbrei ⁇ te for the receiving operation.
  • the switching means For operation in the GSM bands, such a design of the switching means is sufficient that they cause the resonance frequency to be shifted by less than 10 °, in particular by approximately 5c. As explained above, the shift can, however, optionally also be less and even have the value 0 for one of the frequency bands.
  • the switching means act on a reference potential connection of the antenna and in particular connect one of several selectable ground contact points of an antenna surface to ground. Said ground contact points can be connected to the named antenna area via lines of different geometry (in particular of different lengths), so that the resonance frequency shift is essentially caused by a change in the line geometry, especially the length of the line.
  • the switching means which effect the resonance frequency switchover are implemented in a controllable matching network. This is an m from the above-mentioned EP 0667684 AI basic ⁇ additionally known manner particular to an integrated Sehalter- / filter Konflguration.
  • the switching means for establishing a connection between a predetermined area of the antenna and an "outer" element influencing the resonance frequency or a circuit assigned to the antenna, which influences the resonance frequency are arranged.
  • Said outer element is, for example, a capacitor or - to replace it - a varactor diode.
  • the switching means themselves are preferably designed as integrated semiconductor switches or PIN diode switches - in principle, however, a mechanical or micromechanical design is also possible.
  • 1 to 3 are graphical representations for explaining the dependence of the reflection factor on the frequency or the bandwidth properties of multi-band radio antennas (see further above) and
  • FIG. 4 to 6 schematic diagrams of various embodiments of the invention.
  • a first fundamental execution according to FIG. 4 is controlled by an electronic switch one of the signals to the resonance frequency or switching -Vertician a ent ⁇ speaking designed PIF antenna which control the activation of the RX and TX path. It is switched by the switch between two different ground connections.
  • the adaptation network realizes a change in the antenna system properties in the sense of the invention (resonance frequency shift between transmission and reception state in the case of such a clamp-volume antenna that its minimum of the reflection factor-frequency dependence does not cover the transmission and reception band at the same time).
  • an antenna is used, to which additional switching points can be assigned or disconnected.
  • the signals TX active and RX active are fed to these additional circuit locations and cause the antenna resonance properties to change.
  • the concrete implementation can, for. B. based on the above-mentioned publication by P.K. Panayi et al. take place, however, where a solution for antenna tuning is described.

Abstract

The invention relates to a multi-band radio antenna, especially a PIF-type mobile radio antenna which is integrated into a housing for multi-band operation with non-identical transmission and reception frequency bands, comprising switching means for resonance frequency switching between the transmission and reception mode. According to the invention, the antenna volume is reduced in comparison with a device which is of a similar design but which is devoid of switching means.

Description

Beschreibungdescription
Mehrband-FunkantenneMulti-band radio antenna
Die Erfindung betrifft eine Mehrband-Funkantenne nach dem Oberbegriff des Anspruchs 1, die insbesondere zum Einsatz in Mobilfunk-Endgeraten geeignet und vorgesehen ist. Unter dem Begriff "Mehrband-Funkantenne" wird nachfolgend eine Antennenanordnung verstanden, welche gegebenenfalls neben der An- tenne im engeren Sinne auch Anpass- bzw. Anschlussmittel um- fasst .The invention relates to a multi-band radio antenna according to the preamble of claim 1, which is particularly suitable and provided for use in mobile radio terminals. The term “multi-band radio antenna” is understood below to mean an antenna arrangement which, in addition to the antenna in the narrower sense, may also include matching or connecting means.
Mit der rasanten Entwicklung der mobilen Telekommunikation und der Massenherstellung von Mobilfunk-Endgeraten als tech- nisch überaus hochwertige Gebrauchsgegenstande des Alltags hat die Entwicklung von Mehrband-Funkantennen völlig neue Impulse erhalten. Mit der andauernden Tendenz zur Verkleinerung, effizienten Energieausnutzung und Kostenreduzierung der Endgerate ergeben sich auch standig höhere Anforderungen an die Antennenkonstruktion.With the rapid development of mobile telecommunications and the mass production of mobile radio terminals as technically extremely high-quality everyday objects, the development of multi-band radio antennas has received completely new impulses. With the continuing trend towards downsizing, efficient use of energy and cost reduction of end devices, there are constantly higher demands on the antenna construction.
Seit einigen Jahren besteht insbesondere die Anforderung, die Antenne m das Gehäuse des Mobilfunk-Endgerat praktisch voll- standig zu integrieren, ohne dass sie nach außerhalb des Ge- hauses übersteht und damit dessen Handhabung für den Benutzer unkomfortabler machen konnte. In Verbindung mit der Tendenz zur Verkleinerung der Endgerate ist man daher bestrebt, das Volumen der Antenne zu reduzieren.For some years now, there has been a particular requirement for the antenna m to be practically fully integrated into the housing of the mobile radio terminal without it protruding outside the house and thus making its handling more uncomfortable for the user. In connection with the tendency to reduce the size of the terminal devices, efforts are therefore being made to reduce the volume of the antenna.
Diese soll aber zudem kostengünstig herstellbar und - entsprechend einer weiteren wichtigen Tendenz m der Mobilfunk- Endgeratetechnik - m mindestens zwei der praktisch relevanten Frequenzbereiche des GSM-Standards nutzbar sein. Für Endgerate höherer Preisklasse, die insbesondere im geschaftli- chen Bereich genutzt werden, ist sogar die Emsatzfahigkeit m drei Frequenzbereichen gefordert. Als unter diesen Gesichtspunkten vorteilhafte und daher prak¬ tisch besonders bedeutsame Antenne der in Rede stehenden Art hat sich die sogenannte PIF(Planar Inverted-F) -Antenne her¬ ausgestellt. Diese Antenne und Vorschlage zu ihrer konstruk¬ tiven Optimierung werden beispielsweise beschrieben m P. K. Panayi, M. Al-Nuaimi, L. P. Ivrissimtzis "Tuning techniques for the planar mverted-F antenna", National Conference on Antennas and Propagation: 30 March - 1 April 1999, Conference Publication No . 461, IEE, 1999.However, this should also be inexpensive to manufacture and - in accordance with a further important trend in mobile radio terminal technology - it should be possible to use at least two of the practically relevant frequency ranges of the GSM standard. For end devices of a higher price range, which are used in particular in the business area, even the ability to operate in three frequency ranges is required. As advantageous from these points and therefore practical ¬ table particularly important antenna of the type in question has been the so-called PIF (Planar Inverted-F) antenna issued forth ¬. This antenna and proposals for their constructive ¬ tive optimization are described, for example m PK Panayi, M. Al-Nuaimi, LP Ivrissimtzis "tuning techniques for the planar mverted-F antenna", National Conference on Antennas and Propagation: 30 March - 1 April 1999 , Conference Publication No. 461, IEE, 1999.
In der EP 0 667 684 AI werden Optimierungsmoglichkeiten für die Trennung von Sende- und Empfangssignalen m einem Mobil- funk-Endgerat auf der Grundlage einer integrierten Filter- /Schalter-Anordnung beschrieben.EP 0 667 684 AI describes optimization options for the separation of transmit and receive signals in a mobile radio terminal on the basis of an integrated filter / switch arrangement.
Eine wesentliche Konstruktionsanforderung von Mehrband-Funkantennen besteht m der Realisierung eines möglichst kleinen Reflexionsfaktors Sιx bei einer Impedanz nahe 50 0 real in den durch die Antenne zu "bedienenden" Frequenzbandern.An essential design requirement of multi-band radio antennas consists in realizing the smallest possible reflection factor Sι x with an impedance close to 50 0 real in the frequency bands to be “operated” by the antenna.
Ein typischer Verlauf des m Sn-Wertes m Abhängigkeit von der Frequenz bei einer Mobιlfunk-Sende-/Empfangs-antenne ist beispielsweise m Fig. 1 zu erkennen. Hier ist mit einer punktierten Linie und mit einem kleinen Dreieck als Kenn- Zeichnung der Verlauf für einen Antennenaufbau mit relativ großem Volumen und mit einer gestrichelten Linie und Kreisen als Kennzeichnung der Verlauf bei einer Antenne mit relativ kleinem Volumen dargestellt. Es ist zu erkennen, dass die Bandbreite bei der klemvolumigen Antenne deutlich geringer ist. Bei den derzeit hauptsachlich verwendeten integrierten Antennen, nämlich den Patch- und PIF-Antennen, ist die Bandbreite hauptsächlich vom Volumen der Antenne abhangig. Dünnere und damit volumenreduzierte Antennen haben kleinere Bandbreiten.A typical course of the m Sn value m as a function of the frequency in a mobile radio transmission / reception antenna can be seen, for example, in FIG. 1. Here, the course for an antenna structure with a relatively large volume is shown with a dotted line and with a small triangle as an identification drawing, and the course for an antenna with a relatively small volume is shown with a dashed line and circles. It can be seen that the bandwidth is significantly lower with the clamp-volume antenna. With the integrated antennas currently mainly used, namely the patch and PIF antennas, the bandwidth is mainly dependent on the volume of the antenna. Thinner and thus reduced-volume antennas have smaller bandwidths.
Wie m Fig. 1 ebenfalls zu erkennen ist, wirkt sich dies dahingehend aus, dass, wenn das Sendefrequenzband TX vollstan- dig m das Minimum der Sn-Kurve gelegt wird, das Empfangs¬ frequenzband teilweise außerhalb dieser Kurve liegt. Bei die¬ ser Darstellung ließe sich natürlich eine Verbesserung durch eine geringfügige Verschiebung des Kurvenminimums zu höheren Frequenzen hin erreichen - die Darstellung zeigt jedoch deut¬ lich die bestehende Problematik auf.As can also be seen in FIG. 1, this has the effect that when the transmission frequency band TX is fully dig m the minimum of the Sn curve is set, the receive frequency band is partly outside of this curve. In the ser ¬ representation of course, an improvement could be due to a slight displacement of the curve minimum to higher frequencies reach out - but the illustration shows interpreting ¬ Lich the existing problem on.
Der Erfindung liegt im Hinblick auf die oben genannten Anfor¬ derungen und Zusammenhange die Aufgabe zugrunde, eine verbes- serte Mehrband-Funkantenne anzugeben, die auch bei reduzier¬ tem Volumen die relevanten Sende- und Empfangsbander gleichermaßen gut bedient.The invention is in view of the above Anfor ¬ ments and connection based on the object to provide an improved multi-band radio antenna system even at Reducing ¬ volume relevant transmit and receive bands equally well served.
Diese Aufgabe wird durch eine Mehrband-Funkantenne mit den Merkmalen des Anspruchs 1 gelost.This object is achieved by a multi-band radio antenna with the features of claim 1.
Die Erfindung schließt den grundlegenden Gedanken ein, einer durch Volumenreduzierung unzureichend klein gewordenen Bandbreite durch Verschiebung der S_-Kurve zwischen den Sende- und Empfangsvorgangen derart abzuhelfen, dass das für den jeweiligen Vorgang gültige Frequenzband gerade ausreichend durch die jeweilige S -Kurve abgedeckt ist, d. h. vollständig im Kurvenminimum liegt. Dies geschieht durch eine Umschaltung der Antennencharakteristik.The invention includes the basic idea of remedying a bandwidth that has become insufficiently small due to volume reduction by shifting the S_ curve between the transmission and reception processes in such a way that the frequency band valid for the respective process is just sufficiently covered by the respective S curve, i , H. lies completely in the curve minimum. This is done by switching the antenna characteristics.
Je nach konkreter konstruktiver Ausfuhrung und resultierender Bandbreite der Antenne kann eine Sende-/Empfangs-Umschaltung in einem der zu bedienenden Frequenzbander ausreichend oder eine Umschaltung m beiden bzw. sämtlichen Frequenzbandern rotig sein.Depending on the specific design and the resulting bandwidth of the antenna, a transmission / reception changeover in one of the frequency bands to be operated may be sufficient or a changeover in both or all frequency bands may be red.
Der erste Fall ist m Fig. 2 dargestellt, wo die Bandbreite der Antenne im GSM900-Bereιch so groß ist, daß sowohl das Sende- als auch das Empfangsband innerhalb des Kurvenminimums liegen. Für diesen Bereich ist also keine Umschaltung der Antennencharakteristik erforderlich. Hingegen ist zu erkennen, dass im GSMlδOO-Bereich die Anten¬ nenbandbreite völlig unzureichend zur Abdeckung sowohl des Sende- wie auch des Empfangsbandes wäre. Hier wird daher eine Umschaltung vorgenommen, wodurch entweder der durch die ge- strichelte Linie oder der durch die doppelt strichpunktierte Linie dargestellte Verlauf der S.±-Kurve zur Wirkung kommt. Sowohl das GSM 1800-Sendeband als auch das GSM1800-Empfangs- band liegt vollständig innerhalb des jeweils zugeordneten Kurvenminimums, d. h. die Antenne hat sowohl für den Sende- als auch für den Empfangsvorgang die erforderliche Bandbrei¬ te.The first case is shown in FIG. 2, where the bandwidth of the antenna in the GSM900 range is so large that both the transmission band and the reception band lie within the curve minimum. No switching of the antenna characteristics is required for this area. However, is to realize that in GSMlδOO area the technicians ¬ nenbandbreite totally inadequate to cover both the transmitter as well as the reception band would. A switchover is therefore carried out here, as a result of which either the curve of the S. ± curve shown by the dashed line or the double-dashed line takes effect. Both the GSM-1800 transmit band and the GSM 1800 reception band lies completely within the respective associated curve minimum, that is, the antenna has both the transmitting and the required Bandbrei ¬ te for the receiving operation.
Der zweite oben erwähnte Fall ist m Fig. 3 dargestellt, wo sowohl im GSM900-Bereιch als auch im GSM1800-Bereιch eine Um- Schaltung der Antenne zwischen Sende- und Empfangsbetrieb erfolgt. Auch hier wird der Effekt erreicht, dass die Sende¬ bzw. Empfangsbander vollständig m den jeweils zugeordneten Minima der Sx_-Kurve liegen, also die Antennen-Bandbreite sowohl für den Sende- als auch für den Empfangsvorgang voll- standig ausreichend ist.The second case mentioned above is shown in FIG. 3, where both the GSM900 area and the GSM1800 area switch the antenna between transmitting and receiving mode. Again, the effect is achieved that the transmission and reception bands ¬ completely m the respectively associated minima of S x _ curve lie, so the antenna bandwidth for both the transmit and receive operation complete constantly sufficient.
Für den Betrieb m den GSM-Bandern ist eine solche Ausfuhrung der Schaltmittel ausreichend, dass diese eine Verschiebung der Resonanzfrequenz von weniger als 10° - insbesondere von ca. 5c - bewirken. Wie oben erläutert, kann die Verschiebung wahlweise aber auch geringer sein und sogar - für eines der Frequenzbander - den Wert 0 haben.For operation in the GSM bands, such a design of the switching means is sufficient that they cause the resonance frequency to be shifted by less than 10 °, in particular by approximately 5c. As explained above, the shift can, however, optionally also be less and even have the value 0 for one of the frequency bands.
In einer ersten bevorzugten Ausfuhrung wirken die Schaltmit- tel auf einen Bezugspotentialanschluss der Antenne und verbinden insbesondere einen von mehreren auswahlbaren Massekontaktpunkten einer Antennenflache mit Masse. Die besagten Massekontaktpunkte können dabei über Leitungen verschiedener Geometrie (insbesondere verschiedener Lange) mit der genannten Antennenflache verbunden sein, so dass die Resonanzfrequenzverschiebung im wesentlichen über eine Änderung der Zulei- tungsgeometrie, speziell Zuleitungslange, zustandekommt. In einer weiteren vorteilhaften Ausfuhrung sind die die Reso- nanzfrequenzumschaltung bewirkenden Schaltmittel m einem steuerbaren Anpassnetzwerk realisiert. Hierbei handelt es sich m einer aus der oben erwähnten EP 0 667 684 AI grund¬ sätzlich bekannten Weise insbesondere um eine integrierte Sehalter-/Filter-Konflguration.In a first preferred embodiment, the switching means act on a reference potential connection of the antenna and in particular connect one of several selectable ground contact points of an antenna surface to ground. Said ground contact points can be connected to the named antenna area via lines of different geometry (in particular of different lengths), so that the resonance frequency shift is essentially caused by a change in the line geometry, especially the length of the line. In a further advantageous embodiment, the switching means which effect the resonance frequency switchover are implemented in a controllable matching network. This is an m from the above-mentioned EP 0667684 AI basic ¬ additionally known manner particular to an integrated Sehalter- / filter Konflguration.
In einer weiteren zweckmäßigen Ausfuhrung sind die Schaltmit- tel zur Herstellung einer Verbindung zwischen einem vorbestimmten Bereich der Antenne und einem die Resonanzfrequenz beeinflussenden "äußeren" Element oder einer der Antenne zugeordneten Schaltung angeordnet, welche die Resonanzfrequenz beemflusst. Bei dem besagten äußeren Element handelt es sich beispielsweise um einen Kondensator oder - zu dessen Ersetzung - eine Varaktordiode.In a further expedient embodiment, the switching means for establishing a connection between a predetermined area of the antenna and an "outer" element influencing the resonance frequency or a circuit assigned to the antenna, which influences the resonance frequency, are arranged. Said outer element is, for example, a capacitor or - to replace it - a varactor diode.
Die Schaltmittel selbst sind im Hinblick auf die miniaturisierte Ausfuhrung der Antennenanordnung bevorzugt als mteg- rierte Halbleiterschalter oder PIN-Diodenschalter ausgeführt - grundsatzlich ist aber auch eine mechanische bzw. mikromechanische Ausfuhrung möglich.With regard to the miniaturized design of the antenna arrangement, the switching means themselves are preferably designed as integrated semiconductor switches or PIN diode switches - in principle, however, a mechanical or micromechanical design is also possible.
Vorteile und Zweckmäßigkeiten der Erfindung ergeben sich im übrigen aus den Unteranspruchen sowie der nachfolgenden, skizzenartigen Beschreibung grundsatzlicher Ausfuhrungsformen anhand der Figuren. Von den Figuren zeigen:Advantages and expediencies of the invention result from the subclaims and the following, sketch-like description of basic embodiments based on the figures. From the figures show:
Fig. 1 bis 3 grafische Darstellungen zur Erläuterung der Ab- hangigkeit des Reflexionsfaktors von der Frequenz bzw. der Bandbreiteneigenschaften von Mehrband-Funkantennen (siehe dazu weiter oben) und1 to 3 are graphical representations for explaining the dependence of the reflection factor on the frequency or the bandwidth properties of multi-band radio antennas (see further above) and
Fig. 4 bis 6 Prinzipskizzen verschiedener Ausfuhrungsformen der Erfindung. In einer ersten grundsätzlichen Ausfuhrung gemäß Fig. 4 wird zur Resonanzfrequenzumschaltung bzw. -Verstimmung einer ent¬ sprechend gestalteten PIF-Antenne ein elektronischer Schalter durch eines der Signale angesteuert, welche die Aktivierung des RX- bzw. TX-Pfades steuern. Es wird durch den Schalter zwischen zwei verschieden ausgeführten Masseanschlüssen umgeschaltet .Fig. 4 to 6 schematic diagrams of various embodiments of the invention. In a first fundamental execution according to FIG. 4 is controlled by an electronic switch one of the signals to the resonance frequency or switching -Verstimmung a ent ¬ speaking designed PIF antenna which control the activation of the RX and TX path. It is switched by the switch between two different ground connections.
In Fig. 5 ist eine Variante dargestellt, bei der eine Antenne mit mindestens einem Anschluss an ein steuerbares Anpassnetzwerk eingesetzt wird. Das Anpassnetzwerk realisiert hier eine nderung der Antennensystemeigenschaften im Sinne der Erfindung (Resonanzfrequenzverschiebung zwischen Sende- und Empfangszustand bei einer derart klemvolumigen Antenne, dass deren Minimum der Reflexionsfaktor-Frequenz-Abhangigkeit Sende- und Empfangsband nicht gleichzeitig abdeckt) .5 shows a variant in which an antenna with at least one connection to a controllable matching network is used. The adaptation network realizes a change in the antenna system properties in the sense of the invention (resonance frequency shift between transmission and reception state in the case of such a clamp-volume antenna that its minimum of the reflection factor-frequency dependence does not cover the transmission and reception band at the same time).
Bei der m Fig. 6 gezeigten dritten Ausfuhrung wird eine Antenne eingesetzt, der zusätzliche Schaltungstelle zu- bzw. abschaltbar zugeordnet sind. Die Signale TX aktiv und RX aktiv werden diesen zusatzlichen Schaltungstellen zugeführt und bewirken die Änderung der Antennenresonanzeigenschaften . Die konkrete Realisierung kann z. B. in Anlehnung an die oben erwähnte Veröffentlichung von P. K. Panayi et al. erfolgen, wo allerdings eine Losung zur Antennenabstimmung beschrieben wird.In the third embodiment shown in FIG. 6, an antenna is used, to which additional switching points can be assigned or disconnected. The signals TX active and RX active are fed to these additional circuit locations and cause the antenna resonance properties to change. The concrete implementation can, for. B. based on the above-mentioned publication by P.K. Panayi et al. take place, however, where a solution for antenna tuning is described.
Die Ausfuhrung der Erfindung ist nicht auf die oben beschriebenen Beispiele und Ausfuhrungen beschrankt, sondern ebenso in einer Vielzahl von Abwandlungen möglich, die im Rahmen fachgemäßen Handelns liegen. The embodiment of the invention is not limited to the examples and embodiments described above, but is also possible in a large number of modifications which are within the scope of professional action.

Claims

Patentansprüche claims
1. Mehrband-Funkantenne, insbesondere gehauseintegrierte Mo- bilfunkantenne vom PIF-Typ für den Mehrbandbetrieb mit nicht- ldentischen Sende- und Empfangsfrequenzbandern, g e k e n n z e i c h n e t d u r c h1. Multi-band radio antenna, in particular integrated PIF-type mobile radio antenna for multi-band operation with non-identical transmit and receive frequency bands, g e k e n n e i c h n e t d u r c h
Schaltmittel zur Resonanzfrequenzumschaltung zwischen Sende- und Empfangsbetrieb, wobei das Antennenvolumen gegenüber dem- jenigen einer konstruktiv gleichen Anordnung ohne Schaltmit¬ tel verringert ist.Switching means for switching between resonant frequency transmitting and receiving operation, wherein the antenna volume jenigen DEM against a structurally same arrangement without Schaltmit ¬ tel is reduced.
2. Mehrband- Funkantenne nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t, dass die Schaltmittel m mindestens zwei, insbesondere allen, Sen- de-/Empfangsbandern wirken, für die die Antenne ausgelegt2. Multi-band radio antenna according to claim 1, so that the switching means m act at least two, in particular all, transmitting / receiving bands for which the antenna is designed
3. Mehrband-Funkantenne nach Anspruch 1 oder 2, d a d u r c h g e k e n n z e i c h n e t, dass die Schaltmittel eine Verschiebung der Resonanzfrequenz von weniger als 10°, insbesondere von ca. 5°, bewirken.3. Multi-band radio antenna according to claim 1 or 2, d a d u r c h g e k e n n z e i c h n e t that the switching means cause a shift in the resonance frequency of less than 10 °, in particular of about 5 °.
4. Mehrband-Funkantenne nach einem der vorangehenden Anspru- ehe, d a d u r c h g e k e n n z e i c h n e t, dass die Schaltmittel auf einen Bezugspotentialanschluss wirken, insbesondere einen von mehreren auswahlbaren Massekontaktpunkten einer Antennenflache mit Masse verbinden.4. Multi-band radio antenna according to one of the preceding claims, since the switching means act on a reference potential connection, in particular connecting one of several selectable ground contact points of an antenna surface to ground.
5. Mehrband- Funkantenne nach Anspruch 4, d a d u r c h g e k e n n z e i c h n e t, dass die auswahlbaren Massekontaktpunkte, auf die die Schaltmittel wirken, über Leitungen verschiedener Geometrie, insbesondere verschiedener Lange, mit der Antennenflache verbunden sind. 5. Multi-band radio antenna according to claim 4, characterized in that the selectable ground contact points on which the switching means act are connected to the antenna surface via lines of different geometry, in particular of different lengths.
6. Mehrband-Funkantenne nach einem der Ansprüche 1 bis 3, d a d u r c h g e k e n n z e i c h n e t, dass die Schaltmittel m einem steuerbaren Anpassnetzwerk, insbesondere einer integrierten Schalter/Filter-Konfiguration, re- alisiert sind.6. Multi-band radio antenna according to one of claims 1 to 3, so that the switching means are realized in a controllable matching network, in particular an integrated switch / filter configuration.
7. Mehrband-Funkantenne nach einem der Ansprüche 1 bis 3, d a d u r c h g e k e n n z e i c h n e t, dass die Schaltmittel zur Herstellung einer Verbindung zwischen einem vorbestimmten Bereich der Antenne und einem äußeren E- lement, insbesondere einem Kondensator oder einer Varaktordiode, oder einer äußeren Schaltung angeordnet sind.7. Multi-band radio antenna according to one of claims 1 to 3, d a d u r c h g e k e n n z e i c h n e t that the switching means for establishing a connection between a predetermined area of the antenna and an outer element, in particular a capacitor or a varactor diode, or an outer circuit are arranged.
8. Mehrband-Funkantenne nach einem der vorangehenden Anspru- ehe, d a d u r c h g e k e n n z e i c h n e t, dass die Schaltmittel als elektronische Schalter, insbesondere PIN-Diodenschalter oder integrierte Halbleiterschalter, ausgebildet sind.8. Multi-band radio antenna according to one of the preceding claims, so that the switching means are designed as electronic switches, in particular PIN diode switches or integrated semiconductor switches.
9. Mobilfunk-Endgerat mit einer Mehrband-Funkantenne nach einem der vorangehenden Ansprüche. 9. Mobile radio terminal with a multi-band radio antenna according to one of the preceding claims.
PCT/DE2002/002841 2001-08-01 2002-08-01 Multi-band radio antenna WO2003015210A1 (en)

Applications Claiming Priority (2)

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DE10137753.3 2001-08-01
DE2001137753 DE10137753A1 (en) 2001-08-01 2001-08-01 Housing-integrated planar inverted-F antenna for multiband mobile radio terminal has device for switching resonant frequency e.g. by grounding antenna area

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US7746292B2 (en) 2001-04-11 2010-06-29 Kyocera Wireless Corp. Reconfigurable radiation desensitivity bracket systems and methods
US7720443B2 (en) 2003-06-02 2010-05-18 Kyocera Wireless Corp. System and method for filtering time division multiple access telephone communications
WO2006019910A1 (en) * 2004-07-26 2006-02-23 Kyocera Wireless Corp. Full-duplex antenna system and method
DE102005035936A1 (en) * 2005-07-28 2007-02-08 Johnson Controls Gmbh Switching configuration for e.g. radio transmitter, radio receiver in motor vehicle has antenna unit whose frequency band is adjusted based on signal from control unit

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EP0604338A1 (en) * 1992-12-23 1994-06-29 France Telecom Space-saving broadband antenna with corresponding transceiver
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JPH10224142A (en) * 1997-02-04 1998-08-21 Kenwood Corp Resonance frequency switchable inverse f-type antenna
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