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EP0801435A2 - Antenne plate - Google Patents

Antenne plate Download PDF

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Publication number
EP0801435A2
EP0801435A2 EP97105206A EP97105206A EP0801435A2 EP 0801435 A2 EP0801435 A2 EP 0801435A2 EP 97105206 A EP97105206 A EP 97105206A EP 97105206 A EP97105206 A EP 97105206A EP 0801435 A2 EP0801435 A2 EP 0801435A2
Authority
EP
European Patent Office
Prior art keywords
ground reference
reference surface
segment
conductive
flat antenna
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Withdrawn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
EP97105206A
Other languages
German (de)
English (en)
Other versions
EP0801435A3 (fr
Inventor
Mehran Aminzadeh
Michael Daginnus
Manfred Burkert
Shun-Ping Chen
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.)
Fuba Automotive GmbH and Co KG
Original Assignee
Fuba Automotive GmbH and Co KG
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 Fuba Automotive GmbH and Co KG filed Critical Fuba Automotive GmbH and Co KG
Publication of EP0801435A2 publication Critical patent/EP0801435A2/fr
Publication of EP0801435A3 publication Critical patent/EP0801435A3/fr
Withdrawn legal-status Critical Current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
    • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna

Definitions

  • the invention relates to flat antennas for terrestrially radiated signals and radio connections with frequencies in the GHz range, such as L-band reception for DAB, short-range radio connections (ISM bands with 2.4 and 5.8 GHz) and in particular for mobile radio in the 900 -MHz and in the 1.8 GHz band, with the generic features specified in the preamble of the main claim.
  • frequencies in the GHz range such as L-band reception for DAB, short-range radio connections (ISM bands with 2.4 and 5.8 GHz) and in particular for mobile radio in the 900 -MHz and in the 1.8 GHz band, with the generic features specified in the preamble of the main claim.
  • the invention is based on an operating principle that i.a. was characterized in German patent application No. 195 04 577 on the basis of typical solutions from the previous state of the art: two plane elements which are electrically connected by a lateral short circuit and are plane-parallel to one another, one of which (the "ground reference area") to the outer conductor and the other (the "Area segment” with the function-defining outlines) is connected to the inner conductor of a feeding coaxial cable, virtually form a cavity resonator during operation. In the event of a resonance, a field is built up on the open side areas, which leads to radial radiation in usable sizes.
  • the ground reference surface close to a large conductive, flat surface or if the ground reference surface itself is much larger than the surface segment connected to the inner conductor, you get a radiation pattern similar to that of a monopoly, with all-round radiation in the horizontal plane (ie in the plane of the two surface elements).
  • the dimensions of the surface segment connected to the inner conductor are usually based on the measure of a quarter of the wavelength corresponding to the middle operating frequency range (distance from the side with the short-circuit connection to the opposite edge).
  • the mechanical structure that is, the arrangement of the radiator components above a relatively large conductive plane or ground plane and the necessity of such a plane in general - limits this Possible uses of this type of antenna or can represent a significant cost factor.
  • the flat antenna is arranged below the roof shell of a car, which is made of a dielectric material.
  • the surface element representing the ground reference surface rests on a sheet metal plate of larger dimensions, and underneath - "for shielding the vehicle interior against the electromagnetic field when the antenna is operating" - a metal foil is also provided in the dimensions of the roof lining.
  • the large-area metal foil is not only used to protect the vehicle occupants; in fact, it also, as a second important function, supports the sheet metal plate in influencing the field structure and contributes significantly to improving the radiation characteristics and the other operating parameters of the arrangement.
  • the use of a flat antenna of this type thus appears to be restricted to structures in which large, as flat as possible surfaces made of conductive material are available or can be implemented.
  • the present invention is derived from the question of whether it is possible to use the flat antenna even in motor vehicles with a continuously metallic body, without the antenna being designed as an attachment module and projecting visibly beyond the vehicle contours, i.e. whether they e.g. can also be arranged behind certain window panes of a vehicle.
  • the invention has for its object to reduce the mechanical dimensions of flat antennas of the type specified in the preamble of the main claim, in particular the dimensions of the ground reference surface or the ground plane and the overall height, without the function and the operating parameters of the antenna being adversely affected .
  • the invention has succeeded in maintaining the structure of the electromagnetic field above the plane of the ground reference surface, which is characteristic of the flat antenna type described here, in the form of transverse radiation similar to a monopoly, although the ground reference surface or otherwise necessary ground plane are reduced to a minimum could.
  • the antenna according to the invention can be arranged in the upper or lower edge region of the front or rear window of a car without impairing the view for the occupants. This is also benefited by the usually quite steep inclination of these windows in modern vehicles - the projection of the antenna body in the direction of view of the occupants forms a smaller area due to the inclination of the window.
  • the inclination of the panes is at the same time an essential prerequisite for the proper functioning of the antenna as a radio antenna, which largely requires all-round radiation in the horizontal radiation diagram. Up to an inclination of 40 ° to the horizontal, this condition can be met with certainty with the arrangement according to the invention.
  • the field-shaping effect according to the invention of the trough-like ground reference surface is supported in this direction by the adjacent metallic body surfaces and parts.
  • the feature according to the invention of changing the feed corresponds to the reduction in the dimensions of the ground reference area.
  • the connections to the outer conductor and to the inner conductor of the feed cable are made in the interior of the two surface elements, for example in or near the center.
  • the arrangement according to the invention presents itself as a flat module with relatively small area dimensions. If this antenna is positioned on the inside of a front or rear window in the upper or lower edge area, then the rear of the ground reference surface is visible from the inside, which is slightly convex from this perspective or tapers towards the edges.
  • the advantages of the invention are also effective if the antenna is used in a location other than in motor vehicles.
  • the reduction in the necessary ground reference area or mass level and also the overall comparatively small external dimensions allow the formation of a compact, relatively versatile module that can also be manufactured inexpensively.
  • FIG. 1 shows the already mentioned antenna according to US Pat. No. 4,835,541.
  • the antenna consists of the sheet metal strip 1 bent into an isosceles "U" and of the sheet metal plate 2.
  • Each of the two U legs has an operating frequency range of 800 up to 900 MHz - the dimensions 7.62 x 8.71 cm, the dimension between the leg surfaces is 12.7 mm and the sheet metal plate measures 25.4 x 33.18 cm.
  • the feed cable 3 is connected by the outer conductor in point 4 to the U-leg resting on the sheet metal plate and by the inner conductor in feed point 5 to the leg above.
  • Below the sheet metal plate 2 there is the metal foil 6, which is intended to shield the interior of the vehicle, and above the roof shell 7 made of plastic.
  • the film 6 has the same dimensions as the underlying roof lining that completes the structure.
  • FIG. 2 illustrates the principle of the present invention.
  • the ground plane is reduced here to the trough-shaped ground reference surface 8, which consists of sheet metal or a plastic shell metallized on the concave side and at the same time serves as a housing part.
  • the surface segment 10 With the conductive material of the shell, the surface segment 10 is connected via the short circuit 9.
  • the shell is in turn galvanically and mechanically connected to ground 11.
  • the conductor part is designated by 12, which connects the surface segment 10 to the inner conductor of the feed cable 3 via the edge opposite the short circuit.
  • the conductor part 12 can also be designed as an extended and right-angled cable inner conductor.
  • the antenna is provided with a dielectric cover or hood 13.
  • Figure 3 shows - also schematically - a practical design for mounting behind the front or rear window of a car.
  • the approximately trapezoidal contour of the ground reference surface and housing part 8 is not a condition, but has arisen, among other things, from a design point of view.
  • the conductive material of the shell and ground reference surface 8 is largely connected to the mass 11 via the flange 14, here the edge zone of the roof sheet metal shell or the roof spar, and protrudes behind the pane 15 via the edge 16 of the pane border into the window area.
  • the conductor part 12 has a length of 18 mm, and the distance of the surface segment 10 from the ground reference surface 8 is in its Edge area about 10 mm.
  • the distance can be further reduced by extending the conductor part 12, which represents an inductance;
  • the conductor part 12 represents an inductance
  • all dimensions, proportions and parameters of the antenna depend on a number of specific factors and conditions of the respective application (with sometimes conflicting tendencies), such as frequency range and required bandwidth, adjustment to further networks as well as the influence of the materials involved and surrounding constructions and structures, and they must in any case be optimized by individual design and coordination.

Landscapes

  • Waveguide Aerials (AREA)
  • Details Of Aerials (AREA)
EP97105206A 1996-04-09 1997-03-27 Antenne plate Withdrawn EP0801435A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19614068A DE19614068A1 (de) 1996-04-09 1996-04-09 Flachantenne
DE19614068 1996-04-09

Publications (2)

Publication Number Publication Date
EP0801435A2 true EP0801435A2 (fr) 1997-10-15
EP0801435A3 EP0801435A3 (fr) 1998-08-19

Family

ID=7790838

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97105206A Withdrawn EP0801435A3 (fr) 1996-04-09 1997-03-27 Antenne plate

Country Status (3)

Country Link
US (1) US5818394A (fr)
EP (1) EP0801435A3 (fr)
DE (1) DE19614068A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1091444A2 (fr) * 1999-10-08 2001-04-11 ZENDAR S.p.A. Antenne plane pour véhicules à moteur
EP1445825A2 (fr) 2003-02-07 2004-08-11 Sony Ericsson Mobile Communications Japan, Inc. Radiotéléphone portable

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19824414A1 (de) * 1998-05-30 1999-12-02 Volkswagen Ag Antenne bzw. Antennenanordnung für ein Kraftfahrzeug
DE19828122A1 (de) * 1998-06-25 1999-12-30 Fuba Automotive Gmbh Antennen aus flächigen Elementen
DE29818430U1 (de) * 1998-10-15 1999-05-12 Wilhelm Karmann GmbH, 49084 Osnabrück Antenneneinheit
DE19922699C2 (de) 1999-05-18 2001-05-17 Hirschmann Electronics Gmbh Antenne mit wenigstens einem Vertikalstrahler
US6211831B1 (en) * 1999-06-24 2001-04-03 Delphi Technologies, Inc. Capacitive grounding system for VHF and UHF antennas
IT248292Y1 (it) * 1999-12-13 2002-12-16 Zendar Spa Antenna planare a microstrip, per autoveicoli.
DE10025130A1 (de) * 2000-05-20 2001-11-22 Volkswagen Ag Integration von Antennen in Karosseriebauteilen, diein Mischbauweise hergestellt sind
US6441792B1 (en) 2001-07-13 2002-08-27 Hrl Laboratories, Llc. Low-profile, multi-antenna module, and method of integration into a vehicle
US6670921B2 (en) 2001-07-13 2003-12-30 Hrl Laboratories, Llc Low-cost HDMI-D packaging technique for integrating an efficient reconfigurable antenna array with RF MEMS switches and a high impedance surface
US6545647B1 (en) 2001-07-13 2003-04-08 Hrl Laboratories, Llc Antenna system for communicating simultaneously with a satellite and a terrestrial system
US6433756B1 (en) 2001-07-13 2002-08-13 Hrl Laboratories, Llc. Method of providing increased low-angle radiation sensitivity in an antenna and an antenna having increased low-angle radiation sensitivity
US6739028B2 (en) 2001-07-13 2004-05-25 Hrl Laboratories, Llc Molded high impedance surface and a method of making same
US20070211403A1 (en) * 2003-12-05 2007-09-13 Hrl Laboratories, Llc Molded high impedance surface
DE102006039357B4 (de) * 2005-09-12 2018-06-28 Heinz Lindenmeier Antennendiversityanlage zum Funkempfang für Fahrzeuge
DE102007017478A1 (de) * 2007-04-13 2008-10-16 Lindenmeier, Heinz, Prof. Dr. Ing. Empfangsanlage mit einer Schaltungsanordnung zur Unterdrückung von Umschaltstörungen bei Antennendiversity
DE102008031068A1 (de) * 2007-07-10 2009-01-15 Lindenmeier, Heinz, Prof. Dr. Ing. Antennendiversityanlage für den relativ breitbandigen Funkempfang in Fahrzeugen
DE102007039914A1 (de) * 2007-08-01 2009-02-05 Lindenmeier, Heinz, Prof. Dr. Ing. Antennendiversityanlage mit zwei Antennen für den Funkempfang in Fahrzeugen
DE102008003532A1 (de) * 2007-09-06 2009-03-12 Lindenmeier, Heinz, Prof. Dr. Ing. Antenne für den Satellitenempfang
EP2209221B8 (fr) * 2009-01-19 2019-01-16 Fuba Automotive Electronics GmbH Installation de réception destinée à la sommation de signaux d'antennes phasés
DE102009011542A1 (de) * 2009-03-03 2010-09-09 Heinz Prof. Dr.-Ing. Lindenmeier Antenne für den Empfang zirkular in einer Drehrichtung der Polarisation ausgestrahlter Satellitenfunksignale
DE102009023514A1 (de) * 2009-05-30 2010-12-02 Heinz Prof. Dr.-Ing. Lindenmeier Antenne für zirkulare Polarisation mit einer leitenden Grundfläche

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4070676A (en) * 1975-10-06 1978-01-24 Ball Corporation Multiple resonance radio frequency microstrip antenna structure
DE4339162A1 (de) * 1993-11-16 1995-05-18 Lindenmeier Heinz Funkantennenanordnung für den Dezimeterwellenbereich auf einem Kraftfahrzeug
DE4403643A1 (de) * 1994-02-05 1995-08-10 Kolbe & Co Hans Antennenanordnung bei Kraftfahrzeugen

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3972050A (en) * 1975-04-24 1976-07-27 The United States Of America As Represented By The Secretary Of The Navy End fed electric microstrip quadrupole antenna
DE3410415A1 (de) * 1984-03-21 1985-09-26 Gerhard Prof. Dr.-Ing. 8012 Ottobrunn Flachenecker Aktive antenne in der heckscheibe eines kraftfahrzeugs
CA1263745A (fr) * 1985-12-03 1989-12-05 Nippon Telegraph & Telephone Corporation Antenne a microruban en court-circuit
US4835541A (en) * 1986-12-29 1989-05-30 Ball Corporation Near-isotropic low-profile microstrip radiator especially suited for use as a mobile vehicle antenna
DE3738513A1 (de) * 1987-11-13 1989-06-01 Dornier System Gmbh Mikrostreifenleiterantenne
DE3738707C2 (de) * 1987-11-14 1997-11-27 Daimler Benz Aerospace Ag Antennenanordnung
JP2870940B2 (ja) * 1990-03-01 1999-03-17 株式会社豊田中央研究所 車載アンテナ
US5355142A (en) * 1991-10-15 1994-10-11 Ball Corporation Microstrip antenna structure suitable for use in mobile radio communications and method for making same
JPH07122930A (ja) * 1993-10-26 1995-05-12 Matsushita Electric Ind Co Ltd 円偏波平面アンテナ
DE29502253U1 (de) * 1995-02-11 1995-04-06 Fuba Hans Kolbe & Co, 31134 Hildesheim Flachantenne
DE19504577A1 (de) * 1995-02-11 1996-08-14 Fuba Automotive Gmbh Flachantenne
US5689271A (en) * 1996-05-03 1997-11-18 Trimble Navigation Limited Method and apparatus for civilian receiver operation with P(Y) code in satellite positioning system receiver

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4070676A (en) * 1975-10-06 1978-01-24 Ball Corporation Multiple resonance radio frequency microstrip antenna structure
DE4339162A1 (de) * 1993-11-16 1995-05-18 Lindenmeier Heinz Funkantennenanordnung für den Dezimeterwellenbereich auf einem Kraftfahrzeug
DE4403643A1 (de) * 1994-02-05 1995-08-10 Kolbe & Co Hans Antennenanordnung bei Kraftfahrzeugen

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1091444A2 (fr) * 1999-10-08 2001-04-11 ZENDAR S.p.A. Antenne plane pour véhicules à moteur
EP1091444A3 (fr) * 1999-10-08 2002-04-17 ZENDAR S.p.A. Antenne plane pour véhicules à moteur
EP1445825A2 (fr) 2003-02-07 2004-08-11 Sony Ericsson Mobile Communications Japan, Inc. Radiotéléphone portable
EP1445825A3 (fr) * 2003-02-07 2010-03-03 Sony Ericsson Mobile Communications Japan, Inc. Radiotéléphone portable

Also Published As

Publication number Publication date
EP0801435A3 (fr) 1998-08-19
DE19614068A1 (de) 1997-10-16
US5818394A (en) 1998-10-06

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