EP1114490A2 - Antenne fonctionnant dans plusieurs bandes de frequences - Google Patents

Antenne fonctionnant dans plusieurs bandes de frequences

Info

Publication number
EP1114490A2
EP1114490A2 EP99955705A EP99955705A EP1114490A2 EP 1114490 A2 EP1114490 A2 EP 1114490A2 EP 99955705 A EP99955705 A EP 99955705A EP 99955705 A EP99955705 A EP 99955705A EP 1114490 A2 EP1114490 A2 EP 1114490A2
Authority
EP
European Patent Office
Prior art keywords
antenna
frequency bands
antenna according
frequency
resonance
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP99955705A
Other languages
German (de)
English (en)
Inventor
Sheng-Gen Pan
Peter Nevermann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
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 AG filed Critical Siemens AG
Publication of EP1114490A2 publication Critical patent/EP1114490A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q11/00—Electrically-long antennas having dimensions more than twice the shortest operating wavelength and consisting of conductive active radiating elements
    • H01Q11/02—Non-resonant antennas, e.g. travelling-wave antenna
    • H01Q11/08—Helical antennas
    • 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
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/362—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith for broadside radiating helical antennas
    • 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
    • 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

Definitions

  • Antenna that can be operated with several frequency bands
  • the present invention relates to a case of several Fre ⁇ operable bands under antenna according to the preamble of claim 1, which is preferably suitable for use in Frequenzbän ⁇ countries different standards of cellular networks.
  • the cellular network of the GSM standard operates in the 900 MHz range
  • the cellular network of the PCN standard operates in the 1800 MHz range
  • the cellular network of the PCS standard operates in the 1900 MHz range. It should be noted that the frequency bands of the PCN and PCS standards overlap.
  • the mobile telephones must have one or more antennas, which must also have different resonance frequencies.
  • the resonance frequencies are available in the respective frequency ranges of the desired mobile radio networks. At these resonance frequencies, the reflection factor must be as small as possible and there must still be sufficient bandwidth so that the mobile radio telephone can be operated in the respective frequency bands of the mobile radio networks of the various standards.
  • antennas for mobile telephones are subject to severe restrictions due to the structure.
  • b isherigen antenna structures consisting of several antennas have been for example to cover two different frequency bands union under ⁇ two helix antennas or other shapes such as, for example, meander structures used.
  • these solutions require more space than, for example, a simple helical antenna and / or have a reduced performance.
  • An antenna structure is known from EP-A-747990, the essential structure of which is shown schematically in FIG. 5.
  • This antenna structure has a first antenna element 10 and a second antenna element 20.
  • the first antenna element 10 has a shape of a helix and the second antenna element 20 has a shape of a straight rod or conductor.
  • the two antenna elements 10 and 20 are connected to one another at a common feed point 30 and the second antenna element 20 is at least partially arranged within the first antenna element 10.
  • the first and second antenna elements 10 and 20 have different resonance frequencies from one another.
  • the antenna structure shown in FIG. 5 can be operated with at least two frequency bands, such as, for example, two frequency bands of mobile radio networks.
  • the antenna structure described above has considerable disadvantages.
  • the mechanical structure of the antenna structure is complex, since the antenna structure consists of the first and second antenna elements 10 and 20, the second antenna element 20 being at least partially arranged within the first antenna element 10. For this reason, a great deal of effort is required to manufacture the antenna structure.
  • the two antenna elements 10 and 20 are spatially close to one another, which leads to problems such as, for example a short circuit.
  • the antenna structural ⁇ ture is narrowband in the region of the resonance frequencies can orient what to operational problems in certain mobile networks ⁇ ren.
  • the antenna structure requires a matching network to match typically 50 ⁇ .
  • such an adaptation network causes losses in the system due to the components required for this network.
  • the present invention has been created in view of the above-mentioned problems in the prior art and its object is accordingly to provide an antenna which can be operated in several frequency bands and which has a simple and inexpensive structure and is also easy to produce.
  • an antenna which can be operated in the case of a plurality of frequency bands has at least one part which surrounds an area and at least one part which does not enclose an area.
  • the at least two parts consist of a single conductor part and are connected in series to one another. Furthermore, the at least two parts have such an interaction with one another that the antenna has at least two resonance frequencies of a definable position with a respectively high bandwidth.
  • the two parts consist of a single conductor part, only a single manufacturing process is required to manufacture the antenna and an antenna of a simple and inexpensive structure can be achieved.
  • the antenna is so broadband near a first resonance frequency that it can be used with a first target frequency band and so broadband near a second resonance frequency that it can be used with two further target frequency bands, it preferably having a nominal impedance of 50 ⁇ in the target frequency bands .
  • the resonance frequencies of the antenna can be defined with a high bandwidth at the same time in such a way that the antenna can be used in frequency bands of several mobile radio networks, such as the GSM, PCN and PCS standards.
  • FIG. 1 shows an antenna that can be operated in several frequency bands according to a first exemplary embodiment of the present invention
  • FIG. 3 shows an antenna which can be operated in the case of a plurality of frequency bands in accordance with a second exemplary embodiment of the present invention
  • the antenna according to the first exemplary embodiment of the present invention has a first antenna element 1 and a second antenna element 2.
  • the first antenna element 1 has the shape of a helix and the second antenna element 2 has the shape of a straight rod.
  • the two antenna elements 1 and 2 consist of a single conductor part, such as a wire. Furthermore, the two antenna elements are connected in series with one another and, in this exemplary embodiment of the present invention, are arranged spatially one behind the other.
  • the external dimensions of the entire antenna shown in FIG. 1 correspond to those of a helical antenna designed for monoband operation.
  • the antenna Due to the fact that the two antenna elements 1 and 2 consist of a single conductor part, the antenna is simple and compact and can continue to be manufactured in a single manufacturing process. Furthermore, the antenna as a whole can be produced both cheaply and at low cost, since the antenna consists of a single conductor part.
  • each of the two antenna elements 1 and 2 is considered on its own, it should be noted that each of the antenna elements 1 and 2 has several different resonance limits.
  • the coupling of the first and second antenna elements 1 and 2 is designed such that the antenna can be used near one of its first resonance frequencies in one of the target frequency bands, such as GSM or Global System for Mobile Communication at 900 MHz and that the antenna works so broadband near a second resonance frequency that the antenna can be used with two further target frequency bands, such as PCN or Personal Communication Network at 1800 MHz and PCS or Personal Communication System at 1900 MHz .
  • the target frequency bands such as GSM or Global System for Mobile Communication at 900 MHz
  • the antenna works so broadband near a second resonance frequency that the antenna can be used with two further target frequency bands, such as PCN or Personal Communication Network at 1800 MHz and PCS or Personal Communication System at 1900 MHz .
  • this design can take place in such a way that the antenna in the target frequency bands has a nominal impedance of 50 ⁇ at the same time, which makes it possible to operate the antenna without a matching network or with a small number of matching elements, which on the one hand achieves cost savings and on the other hand Losses caused by the components of the adaptation network in the system are avoided.
  • the aforementioned coupling of the two antenna elements is achieved as follows.
  • the helical first antenna element 1 shown in FIG. 1 makes a major contribution to a low resonance frequency of the entire antenna
  • the rod-shaped second antenna element 2 shown in FIG. 1 makes a major contribution to a high resonance frequency of the entire antenna, but also the interaction between the two antenna elements 1 and 2 must be taken into account.
  • the helical antenna element 1 mainly contributes to the setting of the resonance frequency for GSM operation at 900 MHz
  • the rod-shaped antenna element ent mainly contributes to the setting of the Resonanzfre acid sequence for the PCN and PCS operating at 1800 or 1900 MHz in, wherein the antenna at the two resonance frequencies have a high bandwidth, which ensures the reliable operation in the respective frequency bands.
  • FIG. 2 shows a graph which shows the reflection factor of an antenna according to the first exemplary embodiment of the present invention versus the frequency as it was determined by the inventors of the present invention when the coupling of the two antenna elements 1 and 2 was designed accordingly. Furthermore, the respective frequency bands of the mobile radio networks GSM, PCS and PCN are shown in the upper area of the graph for clarification.
  • the antenna has a first resonance frequency in the range of approximately 950 MHz with a bandwidth which is sufficient for operation in the mobile radio network of the GSM standard and a second resonance frequency in the range of approximately 1850 MHz has a bandwidth that is sufficient for operation in both the cellular network of the PCS standard and PCN.
  • FIG. 2 further clarifies that the resonance frequencies of the antenna differ from one another by a factor of approximately 2, which means that the resonance frequencies of the antenna differ greatly from one another.
  • the antenna according to the second exemplary embodiment of the present invention achieves the same advantages as have already been described with regard to the description of the first exemplary embodiment of the present invention, so that its detailed description is omitted here.
  • FIG. 4 shows a graph which shows the reflection factor of an antenna according to the second exemplary embodiment of the present invention versus the frequency as it was determined by the inventors of the present invention with a corresponding design of the coupling of the two antenna elements 1 and 3. Furthermore, in the upper area of the
  • the antenna has a first resonance frequency in the range of approximately 900 MHz with a bandwidth which is sufficient for operation in the mobile radio network of the GSM standard and a second resonance frequency in the range of approximately 1800 MHz has a bandwidth that is sufficient for operation in both the cellular network of the PCS standard and PCN.
  • the first antenna element has the shape of a helix.
  • the first antenna element for example in the form of a rectangular in cross section or triangular Spu ⁇ lenteils. It is essential is that the shape of the antenna elements at ⁇ is selected such that the first antenna element ⁇ encloses an area. That is, the first antenna element is generally chen GESPRO ⁇ an area umschlie- hdes part.
  • the second antenna element is in the form of a straight rod or a rod bent in a meandering manner in one plane.
  • the second antenna element for example in the form of a rod bent in a zigzag shape in one plane. It is essential that the second antenna element is selected such that the second antenna element does not enclose any surface. That is, generally speaking, the second antenna element is a part that does not enclose a surface.
  • the antenna consists of only a first and a second antenna element.
  • the first and second antenna elements in any combination.
  • a first antenna element in the form of a straight rod, a second antenna element in the form of a helix and a further antenna element in the form of a rod meandering in one plane could be formed from a single conductor part.
  • at least one part enclosing a surface and at least one part enclosing no surface must accordingly be provided, these two parts consisting of a single conductor part.
  • the coupling of the antenna elements is designed such that the antenna can be operated in the frequency bands of three different standards of mobile radio networks, it can be seen that the coupling can be designed in such a way that that the antenna can be operated in frequency bands other than those described above, if this is desired for a different application of the antenna.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Waveguide Aerials (AREA)

Abstract

L'invention concerne une antenne fonctionnant dans plusieurs bandes de fréquences. Cette antenne présente au moins un élément (1) qui entoure une surface et au moins un élément (2) qui n'entoure aucune surface. Ces deux éléments (1, 2) ou plus, respectivement constitués d'un élément conducteur unique et montés en série, ont une interaction telle que l'antenne présente au moins deux fréquences de résonance d'une position pour une largeur de bande simultanément haute.
EP99955705A 1998-09-16 1999-09-15 Antenne fonctionnant dans plusieurs bandes de frequences Withdrawn EP1114490A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19842449 1998-09-16
DE19842449 1998-09-16
PCT/DE1999/002925 WO2000016439A2 (fr) 1998-09-16 1999-09-15 Antenne fonctionnant dans plusieurs bandes de frequences

Publications (1)

Publication Number Publication Date
EP1114490A2 true EP1114490A2 (fr) 2001-07-11

Family

ID=7881188

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99955705A Withdrawn EP1114490A2 (fr) 1998-09-16 1999-09-15 Antenne fonctionnant dans plusieurs bandes de frequences

Country Status (6)

Country Link
US (2) US6563476B1 (fr)
EP (1) EP1114490A2 (fr)
JP (1) JP2002525899A (fr)
KR (1) KR20010075127A (fr)
CN (1) CN1201431C (fr)
WO (1) WO2000016439A2 (fr)

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JP2001352212A (ja) * 2000-06-08 2001-12-21 Matsushita Electric Ind Co Ltd アンテナ装置およびそれを用いた無線装置
WO2002043185A1 (fr) * 2000-11-22 2002-05-30 Siemens Aktiengesellschaft Systeme d'antenne
JP2002204120A (ja) * 2000-12-28 2002-07-19 Yokowo Co Ltd アンテナエレメント
JP4565305B2 (ja) * 2001-06-11 2010-10-20 ソニー株式会社 携帯無線端末装置
JP3892685B2 (ja) * 2001-07-26 2007-03-14 株式会社東芝 ヘリカルアンテナ及び携帯端末装置
US7091843B1 (en) * 2002-11-05 2006-08-15 Rajiv Singh Lal Functional and ornamental vehicle accessories
US6882318B2 (en) 2002-03-04 2005-04-19 Siemens Information & Communications Mobile, Llc Broadband planar inverted F antenna
US6642893B1 (en) * 2002-05-09 2003-11-04 Centurion Wireless Technologies, Inc. Multi-band antenna system including a retractable antenna and a meander antenna
US6867748B2 (en) * 2003-06-11 2005-03-15 Inpaq Technology Co., Ltd. Multi-combined multi-frequency antenna
FR2863809B1 (fr) * 2003-12-11 2006-03-31 Wavecom Dispositif de radiocommunication capable de fonctionner selon deux standards de communication
JP2006080721A (ja) * 2004-09-08 2006-03-23 Nec Corp アンテナ装置および携帯無線機
KR100638872B1 (ko) 2005-06-30 2006-10-27 삼성전기주식회사 내장형 칩 안테나
DE102007055234A1 (de) * 2007-11-20 2009-06-10 Continental Automotive Gmbh Mehrbandiges Empfangsantennenmodul
US8170680B2 (en) 2008-03-04 2012-05-01 Cardiac Pacemakers, Inc. Implantable multi-length RF antenna
US8972021B2 (en) * 2008-03-04 2015-03-03 Cardiac Pacemakers, Inc. Detachable helical antenna for implantable medical device
WO2009111012A1 (fr) * 2008-03-04 2009-09-11 Cardiac Pacemakers, Inc. Antenne rf chargée pour un dispositif implantable
US9520640B2 (en) * 2010-12-29 2016-12-13 Electro-Magwave, Inc. Electromagnetically coupled broadband multi-frequency monopole with flexible polymer radome enclosure for wireless radio
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Also Published As

Publication number Publication date
US6563476B1 (en) 2003-05-13
CN1321345A (zh) 2001-11-07
CN1201431C (zh) 2005-05-11
JP2002525899A (ja) 2002-08-13
US20030117340A1 (en) 2003-06-26
WO2000016439A2 (fr) 2000-03-23
US6888514B2 (en) 2005-05-03
WO2000016439A3 (fr) 2001-04-12
KR20010075127A (ko) 2001-08-09

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