EP1214752B1 - Antenne servant a la reception de signaux de satellites et de signaux terrestres, et dispositif de modification d'antenne - Google Patents

Antenne servant a la reception de signaux de satellites et de signaux terrestres, et dispositif de modification d'antenne Download PDF

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Publication number
EP1214752B1
EP1214752B1 EP00926895A EP00926895A EP1214752B1 EP 1214752 B1 EP1214752 B1 EP 1214752B1 EP 00926895 A EP00926895 A EP 00926895A EP 00926895 A EP00926895 A EP 00926895A EP 1214752 B1 EP1214752 B1 EP 1214752B1
Authority
EP
European Patent Office
Prior art keywords
antenna
monopole
dipole
signals
modification device
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.)
Expired - Lifetime
Application number
EP00926895A
Other languages
German (de)
English (en)
Other versions
EP1214752A1 (fr
Inventor
Ulrich Bettin
Heinz GERHÄUSER
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.)
Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
Original Assignee
Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
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Filing date
Publication date
Application filed by Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV filed Critical Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
Publication of EP1214752A1 publication Critical patent/EP1214752A1/fr
Application granted granted Critical
Publication of EP1214752B1 publication Critical patent/EP1214752B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01Q9/44—Resonant antennas with a plurality of divergent straight elements, e.g. V-dipole, X-antenna; with a plurality of elements having mutually inclined substantially straight portions
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
    • H01Q21/08—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a rectilinear path
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/32—Vertical arrangement of 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
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/32—Vertical arrangement of element
    • H01Q9/38—Vertical arrangement of element with counterpoise

Definitions

  • the present invention relates to an antenna and especially on a universal antenna for reception of satellite signals and terrestrial signals, in particular is suitable for mobile use. Further relates The present invention relates to an antenna modification device to modify an existing monopole antenna.
  • the reception field strengths of satellite signals in comparison to signals broadcast by terrestrial transmitters must be significantly lower when drafting and very much in the plastic structure of the receiving antenna Value for a maximum antenna gain in the direction of the satellite be placed.
  • the elevation angle of a receiving antenna geostationary satellites between 30 ° and 60 ° depending on the Latitude at which the receiving antenna is located.
  • the maximum gain of the receiving antenna should therefore be at 45 °.
  • Usual vertical antennas for mobile reception which as so-called rod antennas are referred to, e.g. the classic ⁇ / 4 monopoly, have a system-related, theoretical, Zero at an elevation angle of 90 °, or an angle theta of 0 °.
  • the maximum gain of these antennas at an elevation angle between 10 ° and 35 °.
  • Above an elevation angle of The antenna gain quickly decreases by 35 °, which reduces the system reserve severely reduced in the case of satellite reception becomes. However, this can lead to loss of reception. Consequently are common automotive antennas for common reception terrestrial and satellite signals are not suitable.
  • GB 2306252 A relates to a monopole type antenna, which has a plurality of conductive elements which via resistive elements with each other and with a feeding point are connected.
  • US 5307078 A relates to a three-band antenna that a center conductor, one coaxial with the center conductor arranged first sleeve and one with respect to the central conductor has coaxially arranged second sleeve.
  • US 5,173,713 A discloses an antenna that at least has two linear elements in a predetermined Angles are arranged to each other. Each of the antenna elements has at least one electrical resistance Establishment between two predetermined sections the same is arranged.
  • the object of the present invention is a Antenna for receiving satellite signals and terrestrial Create signals at the loss of reception can be avoided with satellite reception.
  • Another object of the present invention is an antenna modification device for modification existing monopoly antennas that enables to modify existing monopole antennas so that Eliminated or reduced reception losses in satellite reception could be.
  • the present invention provides an antenna for reception of satellite signals and terrestrial signals that has a monopoly that has a first end that ends with a Feed point is connected, and has a second end.
  • the antenna also has an unpowered dipole that is spaced apart from the second end of the monopoly in axial alignment is arranged to the monopoly.
  • the monopoly is a ⁇ / 4 monopoly, while the dipole has a length in a range of ⁇ / 2 - 25% and ⁇ / 2 + 25%. Furthermore, the distance between the monopoly and the dipole is preferably less than ⁇ / 10.
  • the dipole carries the arrangement of monopole and unpowered dipole as a purely passive element via a field coupling to the resulting Polar pattern, i.e. to the far field pattern, the Antenna at.
  • the resulting directional characteristic shows a Maximum profit that is in the range of an elevation angle of 45 °.
  • the antenna according to the invention is thus for reception of signals broadcast over geostationary satellites become, particularly suitable, so that reception losses can be eliminated or reduced.
  • the present invention also provides an antenna modification device to modify a monopole antenna, which has a first end connected to a feed point and has a second end, the antenna modification device has a dipole and a connecting element.
  • the connecting element serves to connect the dipole and of the monopoly such that the dipole is spaced apart from each other from the second end of the monopoly in axial alignment to the monopoly is arranged.
  • a universal antenna for mobile reception of satellites and terrestrial signals such as can be attached to a car roof, explained in more detail.
  • the antenna is preferably on a conductive Base area, for example a car roof 10, attached.
  • a monopoly 12, which is preferably a ⁇ / 4 monopoly at its base where it is attached to the car roof 10 is connected to a feed point 14.
  • Feed point 14 is, for example, a coaxial one Connection.
  • the invention is now spaced from the second end of the monopole 12 a dipole 16 in the axial Alignment to the monopoly 12, being between the Monopoly 12 and the dipole 16 a distance 18 is provided.
  • the length of the dipole is preferably between ⁇ / 2 minus 25% and ⁇ / 2 plus 25%, where ⁇ is the wavelength that the frequency is assigned to the signals to be received. In the most preferred case the length of the dipole is 16 ⁇ / 2.
  • the distance 18 between the monopole 12 and the dipole 16 is preferably less than ⁇ / 10.
  • the dipole 16 is not self-fed, but as a purely passive element, that does not have its own connection, via a field coupling to the resulting directional characteristic, which is shown in FIG. 2 is shown.
  • the antenna arrangement according to the invention has with the result that the maximum profit 20 in one Range of an elevation angle of 45 ° is as by the Arrow 22 is shown in Fig. 2. Furthermore, from FIG see that the maximum gain in the range of an elevation angle of 45 ° about 6 dBi, i.e. 6 dB compared to an isotropic Spotlight. This guarantees optimal reception of satellite signals. As can also be seen in FIG. 2, the gain of the antenna decreases towards the footprint what however due to the already high reception field strengths of the terrestrial broadcast signals at an elevation angle hit the receiving antenna between 0 ° and 20 °, acceptable is.
  • the absolute gain can as well the location of the maximum profit in relation to the base area, i.e. the elevation angle influences or optimizes it become.
  • the antenna signals at a frequency of 2.34 GHz i.e. one wavelength ⁇ of 12.8 cm should be received is the monopoly 12 for example with a length of 3.2 cm and the dipole 16 with a length of 6.4 cm.
  • the antenna is realized by the monopoly 12 and the dipole 16 is encased in a plastic sheath are, for example, for conventional monopoly automotive antennas is common. For example, the Spacing between monopole 12 and dipole 16 through plastic be assured.
  • An antenna modification device is built up from a conventional monopole antenna an antenna according to the invention for reception of satellite signals and terrestrial signals.
  • the antenna modification device according to the invention has a dipole, for example the dipole 16, which is shown in Fig. 1 corresponds.
  • the Antenna modification device a connector (not shown) to the dipole and the conventional To combine monopoly so that they refer to the above have relationship to each other described in FIG. 1.
  • at the connecting element can be, for example a receptacle or other device that is suitable for an element containing the dipole on the second end of a conventional monopoly, usually is clad with plastic.

Landscapes

  • Variable-Direction Aerials And Aerial Arrays (AREA)

Claims (9)

  1. Antenne pour la réception de signaux de satellite et de signaux terrestres, aux caractéristiques suivantes :
    un monopôle (12) avec une première extrémité reliée à un point d'alimentation (14), et une seconde extrémité ;
       caractérisée par
       un dipôle (16) non alimenté disposé à une distance de la seconde extrémité du monopôle (12) en alignement axial avec le monopôle et contribuant, par l'intermédiaire d'un couplage de champ, à la caractéristique d'alignement de l'antenne.
  2. Antenne selon la revendication 1, dans laquelle le monopôle (12) est un monopôle λ/4, λ étant la longueur d'onde des signaux à recevoir.
  3. Antenne selon la revendication 2, dans laquelle le dipôle présente une longueur dans une plage comprise entre λ/2-25% et λ/2 + 25%.
  4. Antenne selon l'une des revendications 1 à 3, dans laquelle le monopôle (12) est disposé de telle sorte que sous la première extrémité se situe une face conductrice (10).
  5. Antenne selon l'une des revendications 1 à 4, dans laquelle le point d'alimentation (14) est une connexion coaxiale.
  6. Antenne selon l'une des revendications 1 à 5, dans laquelle l'écartement entre le monopôle (12) et le dipôle (16) est inférieure à λ/10, λ étant la longueur d'onde des signaux à recevoir.
  7. Dispositif de modification d'antenne destiné à modifier une antenne à monopôle présentant une première extrémité reliée à un point d'alimentation et une seconde extrémité, caractérisé par les caractéristiques suivantes :
    un dipôle ; et
    un élément de connexion destiné à relier le dipôle et le monopôle de telle sorte que le dipôle soit disposé non-alimenté à une distance de la seconde extrémité du monopôle en alignement axial sur le monopôle et contribue, par l'intermédiaire d'un couplage de champ, à la caractéristique d'alignement de l'antenne.
  8. Dispositif de modification d'antenne selon la revendication 7 destiné à modifier une antenne à monopôle λ/4, dans lequel le dipôle présente une longueur dans une plage comprise entre λ/2 - 25% et λ/2 + 25%, λ étant la longueur d'onde des signaux à recevoir.
  9. Dispositif de modification d'antenne selon la revendication 9, dans lequel l'élément de connexion se présente de telle sorte qu'après la connexion du dipôle et du monopôle, l'écartement entre le monopôle et le dipôle est inférieur à λ/10.
EP00926895A 1999-09-16 2000-04-12 Antenne servant a la reception de signaux de satellites et de signaux terrestres, et dispositif de modification d'antenne Expired - Lifetime EP1214752B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19944505 1999-09-16
DE19944505A DE19944505C2 (de) 1999-09-16 1999-09-16 Antenne für den Empfang von Satellitensignalen und terrestrischen Signalen und Antennenmodifikationsvorrichtung
PCT/EP2000/003293 WO2001020721A1 (fr) 1999-09-16 2000-04-12 Antenne servant a la reception de signaux de satellites et de signaux terrestres, et dispositif de modification d'antenne

Publications (2)

Publication Number Publication Date
EP1214752A1 EP1214752A1 (fr) 2002-06-19
EP1214752B1 true EP1214752B1 (fr) 2003-05-28

Family

ID=7922303

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00926895A Expired - Lifetime EP1214752B1 (fr) 1999-09-16 2000-04-12 Antenne servant a la reception de signaux de satellites et de signaux terrestres, et dispositif de modification d'antenne

Country Status (5)

Country Link
US (1) US6633263B2 (fr)
EP (1) EP1214752B1 (fr)
DE (2) DE19944505C2 (fr)
HK (1) HK1046332B (fr)
WO (1) WO2001020721A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7420521B2 (en) * 2007-01-08 2008-09-02 Applied Radar Inc. Wideband segmented dipole antenna
US20080169988A1 (en) * 2007-01-16 2008-07-17 Deaett Michael A Lightweight, conformal, wideband airframe antenna
DE102009015699A1 (de) * 2008-10-30 2010-05-06 Rohde & Schwarz Gmbh & Co. Kg Breitband-Antenne

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4479130A (en) * 1981-06-05 1984-10-23 Snyder Richard D Broadband antennae employing coaxial transmission line sections
GB2148604B (en) * 1983-10-18 1988-01-06 Plessey Co Plc Monopole aerial
DE3826777A1 (de) * 1988-08-06 1990-02-08 Kathrein Werke Kg Axiale zweibereichsantenne
US5173713A (en) * 1991-01-14 1992-12-22 Laboratorie D'etudes Et De Researches Chimiques (Lerc) S.A. Three element inverted conical monopole with series inductance and resistance in each element
US5307078A (en) * 1992-03-26 1994-04-26 Harada Kogyo Kabushiki Kaisha AM-FM-cellular mobile telephone tri-band antenna with double sleeves
US5798736A (en) * 1995-03-28 1998-08-25 Mcdonnell Douglas Corporation Antenna system having a plurality of fundamental resonances
GB2306252B (en) * 1995-10-10 2000-05-10 Edward Charles Forster Self-terminated travelling wave antenna
FR2758012B1 (fr) * 1996-12-27 1999-05-28 Thomson Csf Antenne double, en particulier pour vehicule
JPH11308038A (ja) 1998-04-20 1999-11-05 Yokowo Co Ltd アンテナおよびアンテナ装置
US6337667B1 (en) * 2000-11-09 2002-01-08 Rangestar Wireless, Inc. Multiband, single feed antenna

Also Published As

Publication number Publication date
WO2001020721A1 (fr) 2001-03-22
DE19944505A1 (de) 2001-04-19
DE19944505C2 (de) 2001-10-18
HK1046332A1 (en) 2003-01-03
HK1046332B (zh) 2003-10-17
US20020089460A1 (en) 2002-07-11
US6633263B2 (en) 2003-10-14
DE50002387D1 (de) 2003-07-03
EP1214752A1 (fr) 2002-06-19

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