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WO2009065652A1 - Dispositif radar - Google Patents

Dispositif radar Download PDF

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Publication number
WO2009065652A1
WO2009065652A1 PCT/EP2008/062718 EP2008062718W WO2009065652A1 WO 2009065652 A1 WO2009065652 A1 WO 2009065652A1 EP 2008062718 W EP2008062718 W EP 2008062718W WO 2009065652 A1 WO2009065652 A1 WO 2009065652A1
Authority
WO
WIPO (PCT)
Prior art keywords
radar
plates
lens
antenna
beams
Prior art date
Application number
PCT/EP2008/062718
Other languages
German (de)
English (en)
Inventor
Juergen Hasch
Joerg Hilsebecher
Uwe Wostradowski
Christian Waldschmidt
Christiane Kuhnert
Thomas Hansen
Joachim Selinger
Stephan Schulteis
Original Assignee
Robert Bosch Gmbh
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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Priority to EP08804631A priority Critical patent/EP2218140A1/fr
Publication of WO2009065652A1 publication Critical patent/WO2009065652A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/02—Refracting or diffracting devices, e.g. lens, prism
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/02—Refracting or diffracting devices, e.g. lens, prism
    • H01Q15/04—Refracting or diffracting devices, e.g. lens, prism comprising wave-guiding channel or channels bounded by effective conductive surfaces substantially perpendicular to the electric vector of the wave, e.g. parallel-plate waveguide lens
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/06—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using refracting or diffracting devices, e.g. lens
    • H01Q19/062—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using refracting or diffracting devices, e.g. lens for focusing

Definitions

  • the invention relates to a radar device, a method for providing radar beams, a computer program and a computer program product.
  • Radar sensors are u. a. used in motor vehicles to prevent road accidents.
  • a TR module is an antenna designed as a transmitter / reveiver module, which is suitable for transmitting and receiving electromagnetic waves.
  • Radar antenna are often arranged on such radar antennas focusing elements, so-called. Stielstrahler or Polyrods, which are typically injection molded plastic parts. Pivoting these focusing elements is not possible for the individual radar antenna.
  • Object localization in azimuth ie an angle in the horizontal direction, by triangulation, wherein a triangle mesh is formed to be used.
  • a large bandwidth of the individual radar sensors is necessary in order to obtain a sufficient angular resolution.
  • an adjustable phase assignment of radar antennas is used. By virtue of the phase dividers necessary for this, however, high losses occur, which leads to inefficient radar sensors, since an undesirably high power consumption of the radar sensors can result.
  • a third possibility is a mechanical pivoting of the antenna, which however leads to the use of an error-prone and not wear-free mechanism.
  • a module unit for a radar antenna arrangement with integrated high-frequency chip is known from the document DE 10 2006 009 012 Al.
  • a focusing element is arranged in a beam path of the radar antenna array in front of at least one antenna element, with which a reinforced illumination of the high-frequency chip is achieved.
  • the radar antenna arrangement comprises a mounting device, with the focusing elements of different antenna characteristics can be attached to the module unit.
  • Subject of the document DE 10 2005 056 756 A1 is an antenna arrangement for a radar sensor, in which a first part of an antenna is arranged on a chip which comprises at least a part of a transmitting and receiving unit of the radar sensor. A second radiation-coupled part is arranged at a distance from the first part above the chip.
  • the first part comprises at least one exciter / receiver element and the second part comprises a resonator element arranged on a carrier.
  • this integrated circuit includes a diplex mixer for determining a frequency offset between the first high-frequency signal and a reflected second high-frequency signal, and a transceiver for transmitting and receiving said high-frequency signal signals.
  • this integrated circuit includes a
  • Adjustment means coupled between the diplex mixing means and the transceiver and adapted to adjust the impedance of the transceiver.
  • a multi-beam radar sensor is described in the document DE 199 39 834 Al. The latter has at least two transmitting / receiving elements on a support with a focusing body, this focusing body being assigned to each transmitting / receiving element for prefocusing a beam path.
  • this radar sensor comprises a holder for the focusing body and a dielectric lens, which is arranged in the beam path of the transmitting / receiving element and the focusing body.
  • EP 840 140 A1 discloses an antenna apparatus comprising a primary radiator for radiating a radio wave beam, a movable reflection element for reflecting the radio wave beam, and a lens for converging the radio wave beam reflected by the reflection element to reduce a divergence angle of the radio wave beam.
  • the reflection element is arranged within a beam path of the radio wave beam between the lens and the primary radiator.
  • the radar device has a lens for forming radar bars, which is formed from a number of plates arranged side by side.
  • the radar antenna for which the radar beams are to be formed with the lens formed of the plates is adapted to transmit and / or receive radar beams. Further, the lens for determining a direction of the radar beams receiving the radar antenna is formed. In an embodiment it can be provided that with the plates of the lens, a diffraction of waves of the radar beams is made. In general, the plates of the lens are adapted to form the radar beams, the plates forming the radar beams together.
  • the plates of the lens have a metallic property.
  • a plate has a flat, plate-shaped base body, wherein the base body has a suitably shaped cross-sectional area in the order of magnitude
  • a plate on at least one side at least partially coated with metallic material, usually completely with metallic material. It can also be provided that the plates - A -
  • metallic material for example a metal or a metallic compound which comprises at least one metallic element.
  • the lens of the radar device is usually to be positioned such that the plates are arranged directly in front of the radar antenna, so that radar rays emitted by the radar antenna directly and without detour reach the plates and are molded together by them. Radar beams to be received are also formed by the plates of the lens and reach the radar antenna without detours.
  • At least one plate is movable in at least one spatial direction relative to the at least one radar antenna, for example, rotatable, and thus adjustable in position and / or orientation relative to the at least one radar antenna.
  • it is provided for such an adjustability of the at least one plate that it can be pivoted with respect to at least one angle relative to the at least one radar antenna, for example in the horizontal and / or vertical direction.
  • the lens comprises the at least one plate, usually a plurality of plates, it is also possible to move the at least one plate independently of a movement of at least one other plate of the lens.
  • the radar device has at least one actuator, which is designed, for example, as a piezoelectric element.
  • a movement of the at least one plate can also be controlled and thus controlled and / or regulated on the basis of an electrostatic charge of this at least one plate and a force resulting therefrom.
  • the radar device has at least two plates
  • these at least two plates can be moved by at least one piezoelectric element and / or on the basis of their electrostatic charge relative to each other and thereby inter alia be spaced relative to each other.
  • a variably adjustable distance between two plates has a value in the order of one wavelength of the radar beams used.
  • Two juxtaposed adjacent plates may also be oriented at an angle to each other. In general, surfaces of the juxtaposed plate are oriented parallel to each other. Depending on the application, the plates can, for example, be oriented at an acute angle to one another.
  • a surface of the at least one plate of the lens may be oriented parallel to a propagation direction of the radar beams.
  • the radar device presented here can have at least one radar antenna.
  • the radar device may further comprise at least one control element adapted to control and thus to control and / or regulate the movement or position of the at least one plate of the lens relative to the radar antenna. This can at least one control element with a
  • Arithmetic unit as another possible component of the radar device interact or include such a computing unit.
  • the invention further relates to a method of providing radar beams in which the radar beams are formed with a lens formed of a number of juxtaposed plates.
  • an influence of radar beams which cooperate in design with at least one radar antenna is suitable.
  • a direction of the radar beams can be determined with the lens.
  • the plates of the lens usually have a metallic property.
  • the lens of the radar device has at least two plates, it is provided that a distance between these at least two plates is changed. Furthermore, a position of the at least one plate relative to the at least one radar antenna can be controlled.
  • the invention further relates to a computer program with program code means in order to carry out all the steps of a described method when the computer program is executed on a computer or a corresponding arithmetic unit, in particular in a radar device according to the invention.
  • the computer program product according to the invention with program code means which are stored on a computer-readable data carrier is designed to carry out all the steps of a described method when the computer program is executed on a computer or a corresponding computing unit, in particular in a control unit according to the invention.
  • the invention provides for the use of at least one metallic plate of the lens for beam shaping of at least one radar antenna designed, for example, as a radar sensor.
  • the at least one metallic plate of the lens can also be used for a
  • Radiation direction determination of at least one radar antenna can be used.
  • a main lobe of the radar beams can be pivoted or rotated and thus moved in the azimuth or an angle in the horizontal direction as well as in the elevation or an angle in the vertical direction, in which case no phase splitter is required and no mechanical rotation of the radar antenna is made.
  • This not only the phase divider, which are inherently lossy today, but also the cost of several TR modules or the otherwise required complex mechanics can be saved.
  • the energy consumption and the weight of a radar device can be reduced in an application of the invention.
  • the radar device comprises a radar antenna embodied as a patch antenna or as a transmitting and / or receiving radar element, which, however, can also be in the form of any directional radar antenna, such as a horn antenna or a Vivaldi antenna.
  • the piezoelectric elements are typically arranged respectively at the upper and lower edges of a plate.
  • two adjacent plates can be connected to one another via at least one piezoelectric element.
  • the plates typically having metallic properties, may be suitably positioned upon deflection by an electric field provided, for example, by a conductive foil on a surface of a base of a plate.
  • an electric field provided, for example, by a conductive foil on a surface of a base of a plate.
  • Other possibilities for the deflection of the plates represent any suitable actuators.
  • the invention can u. a. be used for radar sensors, so that a directional resolution is possible for such radar sensors.
  • the proposed radar device is, for example, suitable for vehicles or motor vehicles and can be arranged on such a vehicle.
  • the at least one radar antenna radar beams are emitted and reflected by possibly located in the vicinity of the vehicle objects and received.
  • emission and / or reception by the lens for example, can be improved depending on the direction.
  • dynamic quantities such as location, speed or acceleration of an object can thus be determined more accurately.
  • Figure 1 shows a schematic representation of a first embodiment of an inventive
  • Figure 2 shows a schematic representation of a second embodiment of a radar device according to the invention in carrying out a first step of a
  • FIG. 3 shows the second device from FIG. 2 when carrying out a second step of the method according to the invention.
  • the first embodiment of a radar arrangement 2 shown diagrammatically in FIG. 1 comprises a lens 3 which has four plates 4, the plates 4 having metallic properties and being arranged parallel to one another at an equidistant spacing 6 from each other.
  • Each of these plates 4 comprises a rectangular base body 8 with an elliptical cutout 10.
  • this radar device 2 presented here has a radar antenna 12, whose base in the figure 1 presented here perpendicular to the main bodies 8 of the plates 4 of Lenses 3 is oriented. Furthermore, it is provided within this radar device 2 that the ellipsenformigen cutouts 10 of the plates 4 of the radar antenna 12 facing away and opposite straight edges of the plates 4 are facing away.
  • the plates 4 with the metallic, plate-shaped base bodies 8 can be moved during operation of the radar device 2 relative to each other and relative to the radar antenna 12 and thus positioned. It can u. a. the distance 6 between two plates 4 are changed. In this embodiment, the distance 6 has a value in the order of one wavelength of the radar beams used here.
  • the plates 4 in operation of the radar device 2 together form radar beams which are emitted from the radar antenna 12 in an emission direction 14.
  • the plates 4 are adapted to form radar beams, which move in the direction of arrival 16 to the radar antenna 12, suitable for the radar antenna 12.
  • FIGS 2 and 3 show a second embodiment of a radar assembly 20 according to the invention with a lens 21, wherein in each case three plates 22, 24, 26 of the lens 21 are shown in different positions. These plates 22, 24, 26 are shown schematically along a section to their surfaces and thus to their plate-like basic bodies of the plates 22, 24, 26.
  • actuators arranged, wherein each two first piezo elements 28, 30 between first, upper edges of adjacent plates 22, 24, 26 and second piezo elements 32nd , 34 are disposed between second lower edges of adjacent plates 22, 24, 26.
  • the actuators designed as piezo elements 28, 30, 32, 34 are arranged outside a relevant beam path of radar beams to be emitted and / or to be received for a radar antenna not shown here.
  • FIG. 2 shows the lens 21 of the radar arrangements 20 in a first operating situation 36, in which the piezoelements 28, 30, 32, 34 are set in such a way that two plates 22, 24, 26 each have a first distance 38 , All of the piezoelectric elements 28, 30, 32, 34 have the same extent, so that the plates 22, 24, 26 are arranged parallel to one another.
  • the lens 21 of the radar arrangement 20 is shown in a second operating situation 40, which results from the first operating situation 36 by changing an expansion, in this case by reducing the extent of all the piezoelements 28, 30, 32, 34.
  • the plates 22, 24, 26 continue to be arranged in parallel to each other in an equal way, wherein two adjacent plates 22, 24, 26 now have a second reduced distance 42 to each other, which is smaller than the first distance 38.
  • FIG. 3 shows the second embodiment of the radar arrangement 20 in a third operating situation 44 of the lens 21, in which the upper piezoelements 28, 30 have a greater extent between the upper edges of adjacent plates 22, 24, 26 than the second piezoelements 32, 34 which between lower edges of adjacent plates 22, 24, 26 are arranged.
  • a third distance 46 between the first, upper edges of adjacent plates 22, 24, 26 is greater than a fourth distance 48 between lower, second edges of adjacent plates 22, 24, 26.
  • Each two adjacent plates 22, 24, 26 are now under oriented at an acute angle to each other.

Landscapes

  • Aerials With Secondary Devices (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

L'invention concerne un dispositif radar (2) qui présente une lentille (3) pour former des faisceaux radar pour une antenne radar (12), sachant que la lentille (3) est constituée d'un certain nombre de plaques (4) disposées en juxtaposition. D'après le procédé selon l'invention pour fournir des faisceaux radar, les faisceaux radar sont formés avec une lentille (3) qui est constituée d'un certain nombre de plaques (4) disposées en juxtaposition. L'invention concerne en outre un programme informatique et un produit programme informatique.
PCT/EP2008/062718 2007-11-22 2008-09-24 Dispositif radar WO2009065652A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08804631A EP2218140A1 (fr) 2007-11-22 2008-09-24 Dispositif radar

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200710056215 DE102007056215A1 (de) 2007-11-22 2007-11-22 Radareinrichtung
DE102007056215.4 2007-11-22

Publications (1)

Publication Number Publication Date
WO2009065652A1 true WO2009065652A1 (fr) 2009-05-28

Family

ID=39929967

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/062718 WO2009065652A1 (fr) 2007-11-22 2008-09-24 Dispositif radar

Country Status (3)

Country Link
EP (1) EP2218140A1 (fr)
DE (1) DE102007056215A1 (fr)
WO (1) WO2009065652A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2576463A (en) * 1947-12-30 1951-11-27 Bell Telephone Labor Inc Metallic lens antenna
US2712067A (en) * 1946-04-08 1955-06-28 Bell Telephone Labor Inc Metallic lens directive antenna systems
WO1994011920A1 (fr) * 1992-11-10 1994-05-26 Stig Anders Petersson Lentille de guide d'ondes et son procede de fabrication
WO1997022158A1 (fr) * 1995-08-31 1997-06-19 The Government Of The United States Of America, Represented By The Secretary Of The Navy Antenne reseau a commande de phase et a lentille ferromagnetique commandee en tension
DE19736089C1 (de) * 1997-08-20 1998-12-24 Bosch Gmbh Robert Metallplattenlinse
EP1624317A1 (fr) * 2004-08-05 2006-02-08 Robert Bosch Gmbh Détecteur radar pour véhicules motorisés avec un lobe secondaire dirigé vers la surface de la route

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10145129A (ja) 1996-11-01 1998-05-29 Honda Motor Co Ltd アンテナ装置
DE19939834A1 (de) 1999-08-21 2001-02-22 Bosch Gmbh Robert Mehrstrahliger Radarsensor mit einer Halterung für einen Fokussierkörper
DE10355796B4 (de) 2003-11-28 2016-10-13 Robert Bosch Gmbh Integrierte Schaltung zur Abstands- und/oder Geschwindigkeitsmessung von Objekten
DE102006009012A1 (de) 2005-11-29 2007-05-31 Robert Bosch Gmbh Moduleinheit für eine Radar-Antennenanordnung mit integriertem HF-Chip
DE102005056756A1 (de) 2005-11-29 2007-05-31 Robert Bosch Gmbh Antennenanordnung für einen Radar-Sensor

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2712067A (en) * 1946-04-08 1955-06-28 Bell Telephone Labor Inc Metallic lens directive antenna systems
US2576463A (en) * 1947-12-30 1951-11-27 Bell Telephone Labor Inc Metallic lens antenna
WO1994011920A1 (fr) * 1992-11-10 1994-05-26 Stig Anders Petersson Lentille de guide d'ondes et son procede de fabrication
WO1997022158A1 (fr) * 1995-08-31 1997-06-19 The Government Of The United States Of America, Represented By The Secretary Of The Navy Antenne reseau a commande de phase et a lentille ferromagnetique commandee en tension
DE19736089C1 (de) * 1997-08-20 1998-12-24 Bosch Gmbh Robert Metallplattenlinse
EP1624317A1 (fr) * 2004-08-05 2006-02-08 Robert Bosch Gmbh Détecteur radar pour véhicules motorisés avec un lobe secondaire dirigé vers la surface de la route

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
E.JEHAMY G.LANDRAC M.NEY S.PINNEL B.DELLA: "A Compact Constrained Metal Plate Lens for Anti-Collision Radar at 76 GHz", INTERNATIONAL ITG CONFERENCE ON ANTENNAS (INICA 2003), 17 September 2003 (2003-09-17) - 19 September 2003 (2003-09-19), Berlin, XP002503448 *
SAMUEL SILVER (ED.): "Microwave antenna theory and design", 1949, PETER PEREGRINUS LTD, LONDON, UK, XP002503449 *

Also Published As

Publication number Publication date
EP2218140A1 (fr) 2010-08-18
DE102007056215A1 (de) 2009-05-28

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