EP1350122A2 - Dispositif de production de signaux hyperfrequence - Google Patents

Dispositif de production de signaux hyperfrequence

Info

Publication number
EP1350122A2
EP1350122A2 EP01991668A EP01991668A EP1350122A2 EP 1350122 A2 EP1350122 A2 EP 1350122A2 EP 01991668 A EP01991668 A EP 01991668A EP 01991668 A EP01991668 A EP 01991668A EP 1350122 A2 EP1350122 A2 EP 1350122A2
Authority
EP
European Patent Office
Prior art keywords
frequency
photodiode
lasers
radiation
laser beams
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Withdrawn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
EP01991668A
Other languages
German (de)
English (en)
Inventor
Reinhard Meschenmoser
Bernhard Schwaderer
Wolfgang Ehrlinger
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 EP1350122A2 publication Critical patent/EP1350122A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/03—Details of HF subsystems specially adapted therefor, e.g. common to transmitter and receiver
    • G01S7/032—Constructional details for solid-state radar subsystems
    • 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
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/35—Details of non-pulse systems

Definitions

  • the present invention describes a device for generating microwave signals, in particular for use in a distance and speed sensor in a motor vehicle.
  • two laser sources are operated, the imitated radiation of which differ by a fixed wavelength difference.
  • the two lasers are arranged so that the emitted laser beams are spatially superimposed.
  • a photodiode is arranged in this area in which the two laser beams interfere. This photodiode generates an electrical output signal from the overlay product of the two laser beams.
  • This photodiode generates an electrical output signal from the overlay product of the two laser beams, which has the beat frequency of the two superimposed laser beams.
  • the frequency difference between the two lasers is chosen so that the frequency; the resulting beat is in the range of the microwave signals.
  • the essence of the present invention is to provide a device for generating microwave signals, in particular for use in a motor vehicle.
  • the microwave signal is generated by means of the emitted radiation from the two lasers, which irradiate a common photodiode.
  • the frequency difference of the beat frequency generated by the two lasers is advantageously in the range between 50 GHz and 100 GHz.
  • the two lasers are operated in an injection-locking mode by the two Laser the radiation from another or more other laser sources is injected.
  • the device is advantageously operated in a motor vehicle, in particular as a microwave generator for a distance and speed sensor.
  • Fig.l is a block diagram of a preferred embodiment. Description of the embodiment
  • Fig.l shows a preferred embodiment of the device according to the invention.
  • the master laser 1 generates a frequency-stable output radiation. This is divided into two partial beams in a power divider 2 and fed to the two laser sources 3 and 4.
  • the two laser sources 3, 4 are advantageously implemented in the form of two laser diodes. It should be pointed out at this point that the master laser 1 and the power divider 2 do not necessarily have to be present according to the invention. If the two laser sources 3, 4 emit a sufficiently frequency-stable output signal without the master laser 1, the master laser 1 and the power divider 2 can be dispensed with. These two laser sources 3, 4 each in turn generate an output radiation 5, 6.
  • the two output beams 5, 6 of the laser sources 3, 4 differ in their frequencies by the frequency amount that at the output of the photodiode 7 is the frequency of the microwave signal to be generated should be generated. If, for example, the microwave signal to be generated should have a frequency of 76 gigahertz, then the frequencies of the output radiations 5,6 of the two laser sources 3,4 must differ by exactly this value, that is to say by a frequency difference of 76 gigahertz, so that due to the mixture of the two beams 5,6, which corresponds mathematically to a multiplication, due to the non-linearity of the photodiode 7, the desired microwave output frequency of 76 gigahertz is produced.
  • These two radiation beams 5, 6 of the two laser sources 3, 4 are spatially aligned such that an area exists in which the two radiation beams 5, 6 overlap.
  • a photodiode 7 is attached, which by two radiation beams 5, 6 is irradiated simultaneously.
  • the photodiode must be selected so that its bandwidth enables detection of the differential frequency, but frequencies which are much higher than the differential frequency cannot be resolved. Due to the non-linearity of the photodiode 7, an electrical output signal with the desired microwave frequency, which has the frequency difference of the two radiation beams 5, 6, arises from the superimposed optical input signal.
  • the output of this photodiode 7 is a high frequency filter 8, which advantageously used as, band-pass filter may be embodied passed.
  • This filter 8 only allows the microwave signals to pass that are in the desired output frequency band to be generated. Substantially higher or lower frequencies are filtered out of the input signal of the filter 8.
  • the microwave signal is amplified in a high-frequency amplifier 9 and fed to a further processing device 10.
  • the further processing device 10 is advantageously a device for transmitting and receiving microwave radiation.
  • the device described, comprising electrical and optical components can also be produced on a single substrate as a monolithic semiconductor chip.
  • this device is mounted in a housing which is provided in particular for speed and distance control in a motor vehicle, the device according to the invention being able to serve as a frequency generator.

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optical Radar Systems And Details Thereof (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Electronic Switches (AREA)

Abstract

La présente invention concerne un dispositif de production de signaux hyperfréquence, notamment destiné à être utilisé dans un détecteur de distance et de vitesse d'un véhicule automobile. A cet effet, on fait fonctionner deux sources lasers dont les rayons émis se distinguent par une différence de longueur d'onde fixe. Les deux lasers sont placés de telle façon que les rayons lasers émis se superposent spatialement. Une photodiode qui est placée dans la zone où les deux rayons interfèrent, génère un signal de sortie électrique à partir du produit de superposition des deux rayons lasers. Ce signal de sortie électrique présente la différence des fréquences des deux rayons lasers superposés. On sélectionne la différence des fréquences des deux lasers de telle façon que la fréquence du rayon hyperfréquence se situe dans la zone du faisceau radar produit.
EP01991668A 2000-12-29 2001-12-27 Dispositif de production de signaux hyperfrequence Withdrawn EP1350122A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10065721 2000-12-29
DE10065721 2000-12-29
PCT/DE2001/004894 WO2002054098A2 (fr) 2000-12-29 2001-12-27 Dispositif de production de signaux hyperfrequence

Publications (1)

Publication Number Publication Date
EP1350122A2 true EP1350122A2 (fr) 2003-10-08

Family

ID=7669423

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01991668A Withdrawn EP1350122A2 (fr) 2000-12-29 2001-12-27 Dispositif de production de signaux hyperfrequence

Country Status (5)

Country Link
US (1) US7389197B2 (fr)
EP (1) EP1350122A2 (fr)
JP (1) JP2004517323A (fr)
DE (1) DE10163581A1 (fr)
WO (1) WO2002054098A2 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060140644A1 (en) * 2004-12-23 2006-06-29 Paolella Arthur C High performance, high efficiency fiber optic link for analog and RF systems
US9800018B2 (en) * 2015-02-20 2017-10-24 Hrl Laboratories, Llc Chip-scale power scalable ultraviolet optical source
KR102087192B1 (ko) 2019-04-30 2020-03-10 한국과학기술원 펄스 레이저를 이용한 저-지터 디지털 클럭 신호 생성 시스템, 그리고 마이크로파 생성 시스템

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4216474A (en) 1978-12-26 1980-08-05 International Telephone And Telegraph Corporation Pulse frequency modulator and compressor for staircase FM radar systems
GB2250134B (en) * 1983-06-30 1992-10-14 Standard Telephones Cables Ltd Local oscillator arrangement for imaging radar
US4948257A (en) * 1987-09-14 1990-08-14 Tsi Incorporated Laser optical measuring device and method for stabilizing fringe pattern spacing
US5216478A (en) * 1989-03-31 1993-06-01 Canon Kabushiki Kaisha Doppler velocity meter
JP3125509B2 (ja) 1993-03-09 2001-01-22 ソニー株式会社 カセットテープ駆動装置
JPH07104948A (ja) 1993-10-05 1995-04-21 Nissin Electric Co Ltd 情報記憶装置
US5710651A (en) * 1995-12-13 1998-01-20 California Institute Of Technology Remote millimeter-wave antenna fiber optic communication system using dual optical signal with millimeter-wave beat frequency
US5677697A (en) * 1996-02-28 1997-10-14 Hughes Electronics Millimeter wave arrays using Rotman lens and optical heterodyne
JP3548463B2 (ja) * 1999-07-29 2004-07-28 ペンタックス株式会社 マルチビーム走査光学装置の同期信号検出方法及び検出装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO02054098A3 *

Also Published As

Publication number Publication date
US20040070385A1 (en) 2004-04-15
WO2002054098A3 (fr) 2003-08-07
DE10163581A1 (de) 2002-07-04
US7389197B2 (en) 2008-06-17
WO2002054098A2 (fr) 2002-07-11
JP2004517323A (ja) 2004-06-10

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