WO1998010483A1 - Dual-mode antenna for a mobile radio telephone - Google Patents

Dual-mode antenna for a mobile radio telephone Download PDF

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Publication number
WO1998010483A1
WO1998010483A1 PCT/DE1997/001931 DE9701931W WO9810483A1 WO 1998010483 A1 WO1998010483 A1 WO 1998010483A1 DE 9701931 W DE9701931 W DE 9701931W WO 9810483 A1 WO9810483 A1 WO 9810483A1
Authority
WO
WIPO (PCT)
Prior art keywords
gsm
dect
mobile radio
antenna
dual
Prior art date
Application number
PCT/DE1997/001931
Other languages
German (de)
French (fr)
Inventor
Gerhard Zeller
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 WO1998010483A1 publication Critical patent/WO1998010483A1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/44—Transmit/receive switching
    • H04B1/48—Transmit/receive switching in circuits for connecting transmitter and receiver to a common transmission path, e.g. by energy of transmitter
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/342—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
    • H01Q5/357—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using a single feed point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/3827—Portable transceivers

Definitions

  • the invention relates to a dual-mode mobile radio device with a GSM radio device and a DECT radio device for wireless connection to a GSM and a DECT mobile radio system.
  • Digital data can be exchanged between the subscribers of a mobile radio network or mobile radio system.
  • the mobile radio system can be designed in accordance with the GSM standard (radio transmission system in accordance with the recommendations of the CEPT subcommittee Group Special Mobile or Global System for Mobile Communication, GSM) or in accordance with the DECT standard (Digital European Cordless Telecommunication, DECT).
  • GSM radio transmission system in accordance with the recommendations of the CEPT subcommittee Group Special Mobile or Global System for Mobile Communication, GSM
  • DECT Digital European Cordless Telecommunication, DECT
  • the exchanged digital data can be digitized voice signals, data for fax communication or more generally data for stationary or mobile data processing systems, such as personal computers or notebooks.
  • a so-called dual mode mobile radio device can have a GSM and a DECT system.
  • the radio traffic is currently carried out with a GSM mobile radio system in the frequency band from 890 to 950 MHz with a cell size from 1 to 30 km and with a DECT mobile radio system in the frequency band from 1880 to 1900 MHz with a cell size of up to 500 meters.
  • the small cell system of the DECT mobile radio system is preferably operated inside buildings.
  • a dual-mode mobile device two antennas with different lengths are installed.
  • the advantage of using two antennas is that there is little mutual interference between the two antenna connections.
  • the optimal antenna length can also be provided for each mobile radio system.
  • the invention is based on the object of specifying a dual-mode mobile radio device in which the costs and the space required for accommodating the antennas are reduced.
  • the mobile radio device allows a cheaper device design.
  • mutual field influence when using a single antenna is excluded.
  • FIGS. 2 and 3 show the radiation characteristics in the GSM and in the DECT mobile radio system.
  • FIG. 1 shows the circuit blocks of a dual-mode mobile radio MF necessary for understanding the invention.
  • the mobile radio device MF has a GSM system GS and a DECT system DS.
  • these two systems GS and DS are accommodated, for example, on two separate modules.
  • the GSM system GS has a GSM radio device GFE.
  • the DECT system DS has a DECT radio device DFE.
  • Further circuit blocks of a mobile radio device such as the logic circuit for signal processing and control of the mobile radio device MF, a user interface with a keyboard and a display device are of secondary importance for the invention and are not shown in the drawing.
  • the dual-mode mobile radio MF has a single antenna A.
  • the antenna A is arranged, for example, between the two modules for the GSM system GS and the DECT system DS.
  • the base point of antenna A is connected via two networks, a so-called duplexer, to the GSM radio device GFE and to the DECT radio device DFE.
  • the duplexer DP has a GSM adapter circuit GAS and a DECT blocking circuit DSS.
  • the GS radio device GFE is connected to the base point of the antenna A via these two networks.
  • the duplexer DP has a DECT adapter circuit DAS and a GSM blocking circuit GSS. Is over these two networks
  • DECT radio device DFE connected to the base of antenna A.
  • the antenna adaptation of the DECT output of antenna A i.e. the GSM blocking circuit DSS and the DECT adapter circuit DAS are arranged on the module of the DECT system DS.
  • Analogue are the antenna adaptation of the GSM output of antenna A, i.e. the DECT blocking circuit DSS and the GSM adapter circuit GAS are arranged on the module of the GSM system GS.
  • the antenna A has a length of ⁇ / 2 for the GSM system.
  • the radiation characteristic of the ⁇ / 2 antenna A for the GSM system GS is shown in FIG. 2.
  • the DECT system DS For the DECT system DS, this results in a length of ⁇ for the antenna A.
  • the radiation characteristic of the ⁇ antenna A in the DECT range is shown in FIG. 3. Since the DECT mobile radio system is mainly used in closed rooms, more reflections can be expected, which compensate for the unfavorable radiation characteristics of the ⁇ antenna A.
  • the length of the antenna A of the dual-mode mobile device MF is therefore optimized for the 900 MHz range of the GSM mobile radio system, with hardly any losses being incurred in the 1900 MHz range of the DECT mobile radio system due to the spatial reflections that occur.

Abstract

The invention concerns a dual-mode mobile radio telephone (MF) having a GSM radio system (GFE) and a DECT radio system (DFE) for wireless connection to GSM and DECT mobile radio telephone systems whose wavelength ranges for the radio communication differ approximately by a factor of two. According to the invention, a single antenna (A) is provided for the two mobile radio telephone systems, the antenna length corresponding to half the wavelength of the GSM mobile radio telephone system. The antenna (A) is connected to the respective radio system (GFE, DFE) via a duplexer (DP).

Description

Dualmode-.Antenne für ein MobilfunkgerätDual-mode antenna for a mobile device
Die Erfindung betrifft ein Dual-Mode-Mobilfunkgerät mit einer GSM-Funkeinrichtung und einer DECT-Funkeinrichtung zur draht- losen Anschaltung an ein GSM- und ein DECT-Mobilfunksystem.The invention relates to a dual-mode mobile radio device with a GSM radio device and a DECT radio device for wireless connection to a GSM and a DECT mobile radio system.
Zwischen den Teilnehmern eines Mobilfunknetzeε bzw. Mobil- funksystems können digitale Daten ausgetauscht werden. Das Mobilfunksystem kann gemäß dem GSM-Standard (FunkübertragungsSystem gemäß den Empfehlungen des CEPT-Un- terausschusses Group Special Mobile oder Global System for Mobile Communication, GSM) oder gemäß dem DECT-Standard (Digital European Cordless Telecommunication, DECT) ausgebildet sein.Digital data can be exchanged between the subscribers of a mobile radio network or mobile radio system. The mobile radio system can be designed in accordance with the GSM standard (radio transmission system in accordance with the recommendations of the CEPT subcommittee Group Special Mobile or Global System for Mobile Communication, GSM) or in accordance with the DECT standard (Digital European Cordless Telecommunication, DECT).
Die ausgetauschten digitalen Daten können digitalisierte Sprachsignale, Daten zur Fax-Kommunikation oder ganz allgemein Daten für stationäre oder mobile Datenverarbeitungssysteme, wie Personal Computer oder Notebooks, sein.The exchanged digital data can be digitized voice signals, data for fax communication or more generally data for stationary or mobile data processing systems, such as personal computers or notebooks.
Zur wahlweisen Anbindung an das GSM- und das DECT-Mobilfunksystem kann ein sog. Dual-Mode-Mobilfunkgerät ein GSM- und ein DECT-System aufweisen. Der Funkverkehr erfolgt derzeit bei einem GSM- Mobilfunksystem im Frequenzband von 890 bis 950 MHz bei einer Zellgrδße von 1 bis 30 km und bei einem DECT- Mobilfunksystem im Frequenzband von 1880 bis 1900 MHz bei einer Zellgröße von bis zu 500 Metern. Das Kleinzellen- system vom DECT-Mobilfunksystem wird vorzugsweise innerhalb von Gebäuden betrieben.For optional connection to the GSM and the DECT mobile radio system, a so-called dual mode mobile radio device can have a GSM and a DECT system. The radio traffic is currently carried out with a GSM mobile radio system in the frequency band from 890 to 950 MHz with a cell size from 1 to 30 km and with a DECT mobile radio system in the frequency band from 1880 to 1900 MHz with a cell size of up to 500 meters. The small cell system of the DECT mobile radio system is preferably operated inside buildings.
Bei einem Dual-Mode-Mobilfunkgerät sind zwei Antennen mit unterschiedlichen Längen eingebaut . Der Vorteil der Verwendung von zwei Antennen liegt in der geringen gegenseitigen Beeinflussung der beiden Antennenanschaltungen. Weiter kann für jedes Mobilfunksystem die optimale Antennenlänge vorgesehen werden. Der Erfindung liegt die Aufgabe zugrunde, ein Dual-Mode-Mobilfunkgerät anzugeben, bei dem die Kosten und der Platzbedarf für die Unterbringung der Antennen reduziert sind.In a dual-mode mobile device, two antennas with different lengths are installed. The advantage of using two antennas is that there is little mutual interference between the two antenna connections. The optimal antenna length can also be provided for each mobile radio system. The invention is based on the object of specifying a dual-mode mobile radio device in which the costs and the space required for accommodating the antennas are reduced.
Diese Aufgabe wird erfindungsgemäß durch die im Patentanspruch 1 angegebenen Merkmale gelöst.This object is achieved by the features specified in claim 1.
Das erfindungsgemäße Mobilfunkgerät erlaubt ein günstigeres Gerätedesign. Darüber hinaus ist eine gegenseitige Feldbeein- flussung bei der Verwendung einer einzigen Antenne ausgeschlossen.The mobile radio device according to the invention allows a cheaper device design. In addition, mutual field influence when using a single antenna is excluded.
Im folgenden wird die Erfindung anhand eines in der Zeichnung dargestellten Ausführungsbeispieles beschrieben. Dabei zei- gen:The invention is described below with reference to an embodiment shown in the drawing. Show:
Figur 1 das erfindungεgemäße Dual-Mode-Mobilfunkgerät, und die Figuren 2 und 3 die Abstrahlcharakteristiken im GSM und im DECT-Mobilfunksystem.1 shows the dual-mode mobile radio device according to the invention, and FIGS. 2 and 3 show the radiation characteristics in the GSM and in the DECT mobile radio system.
In Figur 1 sind die für das Verständnis der Erfindung notwendigen Schaltungsblöcke eines Dual-Mode-Mobilfunkgerätes MF dargestellt.FIG. 1 shows the circuit blocks of a dual-mode mobile radio MF necessary for understanding the invention.
Zur Anbindung an das GSM- und das DECT-Mobilfunksystem weist das Mobilfunkgerät MF ein GSM-System GS und ein DECT-System DS auf. Bei einem hybriden Aufbau des Mobilfunkgeräteε MF sind diese beiden Systeme GS und DS beispielsweise auf zwei getrennten Baugruppen untergebracht. Das GSM-System GS weist eine GSM-Funkeinrichtung GFE auf. Analog hierzu weist das DECT-System DS eine DECT-Funkeinrichtung DFE auf. Weitere Schaltungsblöcke eines Mobilfunkgerätes, wie die Logikschaltung zur Signalverarbeitung und Steuerung des Mobilfunkgerä- tes MF, eine Bedienoberfläche mit Tastatur und eine Anzeigeeinrichtung sind für die Erfindung von untergeordneter Bedeutung und in der Zeichnung nicht dargestellt. Erfindungsgemäß weist das Dual-Mode-Mobilfunkgerät MF eine einzige .Antenne A auf. Die Antenne A ist beispielsweise zwischen den beiden Baugruppen für das GSM-System GS und dem DECT-System DS angeordnet.To connect to the GSM and the DECT mobile radio system, the mobile radio device MF has a GSM system GS and a DECT system DS. In the case of a hybrid construction of the mobile radio MF, these two systems GS and DS are accommodated, for example, on two separate modules. The GSM system GS has a GSM radio device GFE. Analogously to this, the DECT system DS has a DECT radio device DFE. Further circuit blocks of a mobile radio device, such as the logic circuit for signal processing and control of the mobile radio device MF, a user interface with a keyboard and a display device are of secondary importance for the invention and are not shown in the drawing. According to the invention, the dual-mode mobile radio MF has a single antenna A. The antenna A is arranged, for example, between the two modules for the GSM system GS and the DECT system DS.
Der Fußpunkt der Antenne A ist über zwei Netzwerke, einem sogenannten Duplexer, an der GSM-Funkeinrichtung GFE und an der DECT-Funkeinrichtung DFE angeschaltet. Für das GSM-System GS weist der Duplexer DP eine GSM-Anpaßschaltung GAS und einen DECT-SperrSchaltkreis DSS auf. Über diese beiden Netzwerke ist die GS -Funkeinrichtung GFE mit dem Fußpunkt der Antenne A verbunden. Auf der Seite des DECT-Systems DS weist der Duplexer DP eine DECT-Anpaßschaltung DAS und einen GSM-Sperr- Schaltkreis GSS auf . Über diese beiden Netzwerke ist dieThe base point of antenna A is connected via two networks, a so-called duplexer, to the GSM radio device GFE and to the DECT radio device DFE. For the GSM system GS, the duplexer DP has a GSM adapter circuit GAS and a DECT blocking circuit DSS. The GS radio device GFE is connected to the base point of the antenna A via these two networks. On the DECT system DS side, the duplexer DP has a DECT adapter circuit DAS and a GSM blocking circuit GSS. Is over these two networks
DECT-Funkeinrichtung DFE mit dem Fußpunkt der Antenne A verbunden.DECT radio device DFE connected to the base of antenna A.
Bei einer Weiterbildung der Erfindung sind die Antennenanpas- sung des DECT-Ausganges der Antenne A, d.h. der GSM-Sperr- schaltkreis DSS und die DECT-Anpaßschaltung DAS auf der Baugruppe des DECT-Systems DS angeordnet. Analog sind die Antennenanpassung des GSM-Ausganges der Antenne A, d.h. der DECT- Sperrschaltkreis DSS und die GSM-Anpaßschaltung GAS auf der Baugruppe des GSM-Systems GS angeordnet.In a further development of the invention, the antenna adaptation of the DECT output of antenna A, i.e. the GSM blocking circuit DSS and the DECT adapter circuit DAS are arranged on the module of the DECT system DS. Analogue are the antenna adaptation of the GSM output of antenna A, i.e. the DECT blocking circuit DSS and the GSM adapter circuit GAS are arranged on the module of the GSM system GS.
Die Antenne A weist eine Länge von λ/2 für das GSM-System auf. Die Abstrahlcharakteristik der λ/2-Antenne A für das GSM-System GS ist in Figur 2 dargestellt.The antenna A has a length of λ / 2 for the GSM system. The radiation characteristic of the λ / 2 antenna A for the GSM system GS is shown in FIG. 2.
Hieraus ergibt sich für das DECT-System DS eine Länge für die Antenne A von λ. Die AbstrahlCharakteristik der λ-Antenne A im DECT-Bereich ist in Figur 3 dargestellt. Da das DECT-Mobilfunksystem vorwiegend innerhalb geschlossener Räume Ver- endung findet, ist mit mehr Reflektionen zu rechnen, die die ungünstige Abstrahlcharakteristik der λ-Antenne A kompensieren. Die Länge der Antenne A des Dual-Mode-Mobilfunkgerätes MF ist also für den 900 MHz-Bereich des GSM-Mobilfunksystems optimiert, wobei im 1900 MHz-Bereich des DECT-Mobilfunksystems durch die auftretenden Raumreflektionen kaum Einbußen hinzunehmen sind. For the DECT system DS, this results in a length of λ for the antenna A. The radiation characteristic of the λ antenna A in the DECT range is shown in FIG. 3. Since the DECT mobile radio system is mainly used in closed rooms, more reflections can be expected, which compensate for the unfavorable radiation characteristics of the λ antenna A. The length of the antenna A of the dual-mode mobile device MF is therefore optimized for the 900 MHz range of the GSM mobile radio system, with hardly any losses being incurred in the 1900 MHz range of the DECT mobile radio system due to the spatial reflections that occur.
BezugszeichenlisteReference list
MF MobilfunkgerätMF mobile device
GS GSM-SystemGS GSM system
GFE GS -FunkeinrichtungGFE GS radio equipment
GAS GS -AnpaßschaltungGAS GS adapter circuit
DSS DECT-SperrschaltkreisDSS DECT blocking circuit
DP DuplexerDP duplexer
A AntenneA antenna
DS DECT-SystemDS DECT system
DFE DECT-FunkeinrichtungDFE DECT radio equipment
DAS DECT-AnpaßschaltungTHE DECT adapter circuit
GSS GSM-Sperrschaltkreis GSS GSM blocking circuit

Claims

Patentansprüche claims
1. Dual-Mode-Mobilfunkgerät (MF) mit einer GSM-Funkeinrichtung (GFE) und einer DECT-Funkein- richtung (DFE) zur drahtlosen Anschaltung an ein GSM- und ein DECT-Mobilfunksystem, deren Wellenlängenbereiche für den Funkverkehr sich etwa um den Faktor zwei unterscheiden, bei dem eine einzige Antenne (A) für beide Mobilfunksysteme vorgesehen ist, wobei die Antennenlänge der halben Wellen- länge des GSM- Mobilfunksystems entspricht, und die Antenne (A) über einen Duplexer (DP) mit der jeweiligen Funkeinrichtung (GFE, DFE) verbunden ist.1. Dual-mode mobile radio device (MF) with a GSM radio device (GFE) and a DECT radio device (DFE) for wireless connection to a GSM and a DECT mobile radio system, whose wavelength ranges for radio traffic are about Distinguish factor two, in which a single antenna (A) is provided for both mobile radio systems, the antenna length corresponding to half the wavelength of the GSM mobile radio system, and the antenna (A) via a duplexer (DP) with the respective radio device (GFE , DFE) is connected.
2. Dual-Mode-Mobilfunkgerät (MF) nach Anspruch 1 dadurch gekennzeichnet, daß die Netzwerke für die Antennenanpassung im GSM-Bereich (GAS, DSS) auf der Baugruppe für die GSM-Funkeinrichtung (GFE) und die Netzwerke für die Antennenanpassung im DECT-Bereich (DAS, GSS) auf der Baugruppe für die DECT-Funkeinrichtung (DFE) an- geordnet sind. 2. Dual-mode mobile device (MF) according to claim 1, characterized in that the networks for antenna adaptation in the GSM area (GAS, DSS) on the module for the GSM radio device (GFE) and the networks for antenna adaptation in DECT Area (DAS, GSS) are arranged on the module for the DECT radio device (DFE).
PCT/DE1997/001931 1996-09-04 1997-09-03 Dual-mode antenna for a mobile radio telephone WO1998010483A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19635896 1996-09-04
DE19635896.5 1996-09-04

Publications (1)

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WO1998010483A1 true WO1998010483A1 (en) 1998-03-12

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0829915A2 (en) * 1996-09-11 1998-03-18 Lk-Products Oy Antenna filtering arrangement for a dual mode radio communication device

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Publication number Priority date Publication date Assignee Title
US4792939A (en) * 1986-01-24 1988-12-20 Hitachi Denshi Kabushiki Kaisha Duplex radio communication transceiver
GB2239355A (en) * 1989-12-22 1991-06-26 Yokowo Seisakusho Kk Antenna device shared by three kinds of waves
GB2271487A (en) * 1992-10-09 1994-04-13 Maxon Systems Inc Cordless telephone
US5406296A (en) * 1992-05-11 1995-04-11 Harada Kogyo Kabushiki Kaisha Three-wave antenna for vehicles
EP0719064A2 (en) * 1994-12-23 1996-06-26 Nokia Mobile Phones Ltd. Multi-mode radiotelephone apparatus

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Publication number Priority date Publication date Assignee Title
US4792939A (en) * 1986-01-24 1988-12-20 Hitachi Denshi Kabushiki Kaisha Duplex radio communication transceiver
GB2239355A (en) * 1989-12-22 1991-06-26 Yokowo Seisakusho Kk Antenna device shared by three kinds of waves
US5406296A (en) * 1992-05-11 1995-04-11 Harada Kogyo Kabushiki Kaisha Three-wave antenna for vehicles
GB2271487A (en) * 1992-10-09 1994-04-13 Maxon Systems Inc Cordless telephone
EP0719064A2 (en) * 1994-12-23 1996-06-26 Nokia Mobile Phones Ltd. Multi-mode radiotelephone apparatus

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Title
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0829915A2 (en) * 1996-09-11 1998-03-18 Lk-Products Oy Antenna filtering arrangement for a dual mode radio communication device
EP0829915A3 (en) * 1996-09-11 2000-04-05 Lk-Products Oy Antenna filtering arrangement for a dual mode radio communication device
US6185434B1 (en) 1996-09-11 2001-02-06 Lk-Products Oy Antenna filtering arrangement for a dual mode radio communication device

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