WO2003015210A1 - Antenne radio multibande - Google Patents

Antenne radio multibande 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
Authority
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)
English (en)
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/fr

Links

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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Transceivers (AREA)

Abstract

L'invention concerne une antenne radio multibande, en particulier une antenne radio mobile intégrée à un boîtier, du type PIFA, pour le mode multibande, dont les bandes de fréquences d'émission et de réception ne sont pas identiques, qui comporte des moyens de commutation pour la commutation de fréquence de résonance entre le mode émission et le mode réception, le volume d'antenne étant réduit si l'on compare avec celui d'un ensemble de construction identique sans moyens de commutation.
PCT/DE2002/002841 2001-08-01 2002-08-01 Antenne radio multibande WO2003015210A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10137753.3 2001-08-01
DE2001137753 DE10137753A1 (de) 2001-08-01 2001-08-01 Mehrband-Funkantenne

Publications (1)

Publication Number Publication Date
WO2003015210A1 true WO2003015210A1 (fr) 2003-02-20

Family

ID=7694034

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2002/002841 WO2003015210A1 (fr) 2001-08-01 2002-08-01 Antenne radio multibande

Country Status (2)

Country Link
DE (1) DE10137753A1 (fr)
WO (1) WO2003015210A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
EP2096712A1 (fr) * 2004-07-26 2009-09-02 Kyocera Wireless Corporation Système d'antenne avec une antenne réglable en F inverse
DE102005035936A1 (de) * 2005-07-28 2007-02-08 Johnson Controls Gmbh Schaltungsanordnung, Verfahren zur Anpassung einer Antenneneinheit und Fernsteuerungsvorrichtung

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0604338A1 (fr) * 1992-12-23 1994-06-29 France Telecom Antenne large bande à encombrement réduit, et dispositf d'émission/réception correspondant
JPH10224142A (ja) * 1997-02-04 1998-08-21 Kenwood Corp 共振周波数切換え可能な逆ｆ型アンテナ
EP0892459A1 (fr) * 1997-07-08 1999-01-20 Nokia Mobile Phones Ltd. Structure d'antenne à double résonance pour plusieurs gammes de fréquences
WO2001029927A1 (fr) * 1999-10-15 2001-04-26 Siemens Aktiengesellschaft Antenne commutable
EP1113524A2 (fr) * 1999-12-30 2001-07-04 Nokia Mobile Phones Ltd. Structure d'antenne, méthode pour coupler un signal sur la structure d antenne, unité d'antenne et station mobile avec une telle structure d'antenne

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0604338A1 (fr) * 1992-12-23 1994-06-29 France Telecom Antenne large bande à encombrement réduit, et dispositf d'émission/réception correspondant
JPH10224142A (ja) * 1997-02-04 1998-08-21 Kenwood Corp 共振周波数切換え可能な逆ｆ型アンテナ
EP0892459A1 (fr) * 1997-07-08 1999-01-20 Nokia Mobile Phones Ltd. Structure d'antenne à double résonance pour plusieurs gammes de fréquences
WO2001029927A1 (fr) * 1999-10-15 2001-04-26 Siemens Aktiengesellschaft Antenne commutable
EP1113524A2 (fr) * 1999-12-30 2001-07-04 Nokia Mobile Phones Ltd. Structure d'antenne, méthode pour coupler un signal sur la structure d antenne, unité d'antenne et station mobile avec une telle structure d'antenne

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 13 30 November 1998 (1998-11-30) *

Also Published As

Publication number Publication date
DE10137753A1 (de) 2003-02-13

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