EP1812809A1 - Systeme radar utilise en particulier pour mesurer la distance et/ou la vitesse - Google Patents

Systeme radar utilise en particulier pour mesurer la distance et/ou la vitesse

Info

Publication number
EP1812809A1
EP1812809A1 EP05779856A EP05779856A EP1812809A1 EP 1812809 A1 EP1812809 A1 EP 1812809A1 EP 05779856 A EP05779856 A EP 05779856A EP 05779856 A EP05779856 A EP 05779856A EP 1812809 A1 EP1812809 A1 EP 1812809A1
Authority
EP
European Patent Office
Prior art keywords
radar system
antenna
dipole
frequency
patch
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Withdrawn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
EP05779856A
Other languages
German (de)
English (en)
Inventor
Klaus VOIGTLÄNDER
Matthias Karl
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.)
Robert Bosch GmbH
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
Publication of EP1812809A1 publication Critical patent/EP1812809A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q25/00—Antennas or antenna systems providing at least two radiating patterns
    • H01Q25/002—Antennas or antenna systems providing at least two radiating patterns providing at least two patterns of different beamwidth; Variable beamwidth antennas
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/88—Radar or analogous systems specially adapted for specific applications
    • G01S13/93—Radar or analogous systems specially adapted for specific applications for anti-collision purposes
    • G01S13/931—Radar or analogous systems specially adapted for specific applications for anti-collision purposes of land vehicles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/27—Adaptation for use in or on movable bodies
    • H01Q1/32—Adaptation for use in or on road or rail vehicles
    • H01Q1/3208—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used
    • H01Q1/3233—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used particular used as part of a sensor or in a security system, e.g. for automotive radar, navigation systems
    • 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
    • H01Q5/20—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands
    • H01Q5/28—Arrangements for establishing polarisation or beam width over two or more different wavebands
    • 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
    • H01Q9/065—Microstrip dipole antennas
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/88—Radar or analogous systems specially adapted for specific applications
    • G01S13/93—Radar or analogous systems specially adapted for specific applications for anti-collision purposes
    • G01S13/931—Radar or analogous systems specially adapted for specific applications for anti-collision purposes of land vehicles
    • G01S2013/9315—Monitoring blind spots

Definitions

  • Radar system in particular for distance and / or speed measurement
  • the invention relates to a radar system, in particular for distance and / or speed measurement in motor vehicles, which is based on the use of
  • a pulse Doppler radar system for distance or speed measurement in a motor vehicle.
  • a multiplier or mixer is provided there in order to supply the transmitting antenna with a signal which corresponds to twice the frequency of a reference oscillator.
  • the frequency doubling is done there in order to use a reference oscillator with lower frequency and thus more stable behavior.
  • the antenna characteristic changing by harmonic excitation of the same antenna in different frequency ranges is used to evaluate different solid angle ranges around an object, can be different without changing the hardware
  • Frequency generation and modulation can be realized at lower frequencies with little effort and stability. All that is necessary is a frequency multiplier that can be implemented with active or passive circuits.
  • the required amplifiers and mixers can either be switched in frequency or are advantageously designed broadband without switching.
  • the mixer can also be used with simple and thus inexpensive subharmonic mixer concepts.
  • Beam angle with higher order (from perpendicular to wire / patch). In automotive systems for all-round visibility can therefore be viewed at the lower frequency forward, while at the higher frequency in addition also the side space is covered. With optimized design and phase position any desired direction can be adjusted.
  • the antenna arrangement can also by a
  • FIG. 1 shows a block diagram for a multiple frequency radar system
  • FIG. 2 shows a broadband layer antenna for use in the radar system according to FIG
  • FIG. 4 shows a view of the antenna arrangement according to FIG. 2 with the patch removed
  • FIG. 5 shows an antenna characteristic when excited with the fundamental wave
  • FIG. 6 shows an antenna characteristic under excitation with the third harmonic
  • a reference oscillator 1 which is modulated by a baseband modulator 2, is connected to the transmitting antenna 5 via a switchable frequency multiplier 3 followed by an amplifier 4.
  • LNA Low Noise Amplifier
  • the frequency ranges in which the radar system according to the invention operates are harmoniously selected to each other similar to the allocations in amateur radio with the bands 3.5,
  • the frequency generation and the modulation are advantageously carried out at low frequencies (fundamental). Only the frequency multiplier 3 and the mixer 8 and the amplifier must be designed for high-frequency signals. They can either be switchable in frequency, or are advantageously designed broadband without switching.
  • the radar system can operate in either pulsed mode, CW (Continuous Wave), FMCW (Freq Modulated CW) mode or mixed mode.
  • CW Continuous Wave
  • FMCW Freq Modulated CW
  • mixed mode For pulse operation, a controlled switch is necessary in the transmission train and a similar switch in the reception train, which is delayed relative to the switch in the transmission train for the duration of the radar pulse for a given distance zone.
  • Suitable as a transmitting and / or receiving antenna is a broadband layer antenna with a transmitting and / or receiving dipole, which is preceded by an electrically coupled patch element at a predetermined distance to the dipole.
  • FIG. 2 shows the basic one
  • the patch 10 a rectangular sheet, is located parallel to the lamination of the antenna assembly 11 at a distance of about 0.1 times the fundamental wavelength at 26 GHz of the transmitted radiation above the flat dipole 12 on the stack.
  • the distance is not limited to this measure, - A -
  • the patch 10 is for example on the device housing, not shown, freely above the dipole
  • the dipole 12 consists of two separate, symmetrical, rectangular metal surfaces which are applied to a dielectric substrate 13, such as a printed circuit board, a ceramic or a softboard material.
  • the dipole halves each have a length of about one quarter of the fundamental wavelength. The wavelength is not evaluated in air, but effectively loaded by the dielectric.
  • Each individual dipole half is connected to a signal feed line 14 (open two-wire line
  • the two signal leads 14 are arranged in parallel and thus form a differential input. They run on the surface of the substrate layer 13 and are for example printed or etched. On the substrate layer
  • a radiation shielding, metallic ground plane 15 is applied, which has 12 recesses only in the region of the signal leads 14 and the dipole.
  • the dipole 12 and the patch 10 are arranged parallel to each other and the two signal leads 14 are perpendicular thereto.
  • the field vectors of the electric field of the dipole 12, the patch 10 and the leads 14 are parallel to each other and point in the same direction.
  • the peripheral chamber strips 17 have a distance of one quarter of the wavelength of the transmitted radiation to the dipole 12. Radiation emitted into the substrate 13 is reflected at the chamber strip 17 and returned in the correct phase.
  • the resonant length of the patch 10 is from left to right. Unlike usual patch antennas, the patch here is longer than wide. The resonant length is half a wavelength on the fundamental wave. When excited to harmonics of this fundamental, about 26 GHz, the radiation angle changes with higher order. The resonant Length of the dipole and / or the patch element are then greater than half the operating wavelength. In motor vehicle systems with all-round visibility, it is therefore possible to look forward when excited in a low frequency range, ie distance measurements to objects in the direction perpendicular to the antenna excitation surface are possible, while at higher harmonics of the fundamental frequency, additional lateral angular ranges are also evaluated. This is advantageous, in particular, for parking aids or when determining the roadway distance. With optimized design and phase position any desired direction can be adjusted.
  • the antenna arrangement can be formed by a plurality of basic elements (dipole / patch) in the performance of the antenna characteristic. It can too
  • Antenna characteristics of different mutually harmonic frequency ranges are linked to form a common evaluation.
  • the evaluation profile is stored on excitation at the fundamental frequency, in order then to be correlated with a current evaluation profile at a higher harmonic frequency.
  • the antenna characteristic of the previously presented antenna with respect to the fundamental wave that is to say at approximately 26 GHz, is shown in FIG. 5.
  • the patch radiates perpendicularly to the patch surface to the front (z-direction).
  • the profit compared to the spherical radiator is in the z-direction 8.18dBi.
  • this direction is occupied by a zero and the radiation is offset by an angle determined by the harmonic number N.
  • Figure 6 shows the antenna characteristic in the excitation of the third harmonic at about 78 GHz.
  • both patch 10 and dipole 12 are biconical.
  • the dipole 12 is biconical and the patch is rectangular.
  • the patch 10 is biconical and the dipole 12 is rectangular.

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Security & Cryptography (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Waveguide Aerials (AREA)

Abstract

Une excitation harmonique d'une antenne se produit dans un système radar à des domaines de fréquence différentes. La caractéristique se transformant de manière conditionnelle est ensuite utilisée dans différents parties à angles solides, ce qui permet d'évaluer un objet.
EP05779856A 2004-11-11 2005-09-14 Systeme radar utilise en particulier pour mesurer la distance et/ou la vitesse Withdrawn EP1812809A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004054466A DE102004054466A1 (de) 2004-11-11 2004-11-11 Radarsystem insbesondere zur Entfernungs- und/oder Geschwindigkeitsmessung
PCT/EP2005/054572 WO2006051015A1 (fr) 2004-11-11 2005-09-14 Systeme radar utilise en particulier pour mesurer la distance et/ou la vitesse

Publications (1)

Publication Number Publication Date
EP1812809A1 true EP1812809A1 (fr) 2007-08-01

Family

ID=35335194

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05779856A Withdrawn EP1812809A1 (fr) 2004-11-11 2005-09-14 Systeme radar utilise en particulier pour mesurer la distance et/ou la vitesse

Country Status (5)

Country Link
US (1) US7688252B2 (fr)
EP (1) EP1812809A1 (fr)
CN (1) CN100570399C (fr)
DE (1) DE102004054466A1 (fr)
WO (1) WO2006051015A1 (fr)

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* Cited by examiner, † Cited by third party
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DE102007060770A1 (de) * 2007-12-17 2009-06-18 Robert Bosch Gmbh Antennenanordnung für einen Radar-Transceiver und Schaltungsanordnung zum Speisen einer Antennenanordnung eines solchen Radar-Transceivers
CN102830397B (zh) * 2012-09-03 2014-09-03 西北工业大学 基于勒让德基带信号的距离、速度探测方法
CN102841348B (zh) * 2012-09-03 2014-06-18 西北工业大学 基于傅里埃基带信号的距离、速度探测方法
CN102841349B (zh) * 2012-09-03 2014-06-18 西北工业大学 基于拉盖尔基带信号的距离、速度探测方法
CN102830396B (zh) * 2012-09-03 2014-09-03 西北工业大学 基于切比雪夫基带信号的距离、速度探测方法
US10591592B2 (en) 2015-06-15 2020-03-17 Humatics Corporation High-precision time of flight measurement systems
US10422870B2 (en) 2015-06-15 2019-09-24 Humatics Corporation High precision time of flight measurement system for industrial automation
CA2989702A1 (fr) * 2015-06-15 2016-12-22 Humatics Corporation Systeme de mesure haute precision de temps de vol
AU2016371057A1 (en) 2015-12-17 2018-07-19 Humatics Corporation Radio-frequency localization techniques and associated systems, devices, and methods
CN111542764B (zh) 2018-03-13 2023-09-19 轨迹人有限责任公司 确定运动球自旋轴的系统和方法
DE102018204494B3 (de) * 2018-03-23 2019-08-14 Robert Bosch Gmbh Erzeugung synthetischer Radarsignale
EP3832800B1 (fr) * 2018-07-30 2024-08-28 Sony Group Corporation Dispositif d'antenne et dispositif de communication
CN111290035B (zh) * 2020-03-25 2025-04-29 深圳迈睿智能科技有限公司 微波多普勒探测模块及设备
EP4083664A4 (fr) * 2019-12-24 2024-01-24 Shenzhen Merrytek Technology Co., Ltd Module et dispositif de détection doppler à micro-ondes
EP4376220A3 (fr) * 2020-02-04 2024-07-31 Aptiv Technologies AG Dispositif radar
CN111290034B (zh) * 2020-03-25 2025-04-29 深圳迈睿智能科技有限公司 高增益微波多普勒探测模块
CN111290036B (zh) * 2020-03-25 2025-04-29 深圳迈睿智能科技有限公司 高增益微波多普勒探测模块
US12212048B2 (en) * 2020-10-01 2025-01-28 Shenzhen Merrytek Technology Co., Ltd. Microwave-doppler detecting module and device thereof
US12080415B2 (en) 2020-10-09 2024-09-03 Humatics Corporation Radio-frequency systems and methods for co-localization of medical devices and patients
CN115841755B (zh) * 2023-02-27 2023-07-25 深圳市顺禾电器科技有限公司 一种车辆碰撞预警方法、装置、电子设备及存储介质

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JP2000206241A (ja) * 1999-01-13 2000-07-28 Honda Motor Co Ltd レ―ダ装置
JP3759333B2 (ja) * 1999-05-28 2006-03-22 三菱電機株式会社 パルスドップラレーダ装置
EP1245059B1 (fr) * 1999-07-30 2006-09-13 Volkswagen Aktiengesellschaft Detecteur radar pour la surveillance de l'environnement d'un vehicule a moteur
EP1253441B1 (fr) * 2000-01-28 2010-04-07 Hitachi, Ltd. Dispositif de mesure de distance
DE10011263A1 (de) 2000-03-08 2001-09-13 Bosch Gmbh Robert Objektdetektionssystem
FI113220B (fi) * 2000-06-12 2004-03-15 Filtronic Lk Oy Monikaista-antenni
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Also Published As

Publication number Publication date
US20080198065A1 (en) 2008-08-21
CN100570399C (zh) 2009-12-16
WO2006051015A1 (fr) 2006-05-18
US7688252B2 (en) 2010-03-30
DE102004054466A1 (de) 2006-06-08
CN101057158A (zh) 2007-10-17

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