EP0102977A1 - Dispositif de surveillance locale a radar doppler - Google Patents

Dispositif de surveillance locale a radar doppler

Info

Publication number
EP0102977A1
EP0102977A1 EP19830900839 EP83900839A EP0102977A1 EP 0102977 A1 EP0102977 A1 EP 0102977A1 EP 19830900839 EP19830900839 EP 19830900839 EP 83900839 A EP83900839 A EP 83900839A EP 0102977 A1 EP0102977 A1 EP 0102977A1
Authority
EP
European Patent Office
Prior art keywords
oscillator
detector
antenna
microstrip
diode
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Withdrawn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
EP19830900839
Other languages
German (de)
English (en)
Inventor
Ian Simpson
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.)
Hoermann Warnsysteme GmbH
Original Assignee
Hoermann 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 Hoermann GmbH filed Critical Hoermann GmbH
Publication of EP0102977A1 publication Critical patent/EP0102977A1/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Withdrawn legal-status Critical Current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

Definitions

  • the invention relates to a device for room surveillance by means of Doppler radar, comprising a microwave oscillator, a transceiver antenna and a detector.
  • a known device of this type ("Electronics Newspaper” Feb. 1980, p.8) contains a Gunn-Oszilla gate in cavity technology, a diode mixer and a planar transmit / receive antenna.
  • a major disadvantage of this known design is its large space requirement and weight, which is essentially due to the oscillator designed in cavity technology.
  • Another disadvantage is the considerable manufacturing costs, to which the connections to be provided between the cavity oscillator and the antenna (usually designed as hollow lines) also make a significant contribution.
  • the invention is therefore based on the object, while avoiding these disadvantages, of providing a device for space monitoring by means of Doppler radar, which is particularly simple and cost-saving
  • the oscillator, antenna, detector and the connecting lines of these elements are constructed in microstrip construction (microstrip or stripline) and are arranged on the same carrier material.
  • FIGS. 1 and 2 To explain what is to be understood in the context of the present application by "microstrip construction", reference is first made to FIGS. 1 and 2.
  • Fig.1 shows the construction method used in Anglo-American
  • insulating plates 1 and 2 which have on their outside a conductive layer 1a or 2a made of metal, which are usually at ground potential.
  • a conductor 3 in the form of a thin metal strip is sandwiched between the insulating plates 1 and 2 and serves as a microwave line.
  • FIG. 2 shows the so-called “microstrip construction”.
  • only one insulating plate 4 is provided, which is provided on one side with a conductive layer 4a, which is usually held at ground potential, and which carries the conductor 5, which is intended to guide the microwaves, on the other side.
  • microstrip design is understood to mean both the designs shown in FIGS. 1 and 2.
  • all the essential components of the device used for space monitoring namely the oscillator, antenna, detector and their connecting lines, are designed in a microstrip design and arranged on the same carrier material.
  • the insulating plate 4 in the construction according to FIG. 2) or one of the two insulating plates 1, 2 (in the construction according to FIG. 1) serves as the carrier material.
  • the oscillator contains a GaAs field-effect transistor.
  • a GaAs field-effect transistor Such an oscillator has significant advantages over a Gunn oscillator in cavity technology. It has a high efficiency and accordingly a lower power consumption. The harmonic content and the resulting signal distortion are smaller.
  • the temperature stability of a GaAs-FET oscillator in planar design can be greater than that of an oscillator in cavity technology. Weight and space requirements are much smaller.
  • Another embodiment of the device according to the invention uses an oscillator with a Gunn diode, which is likewise constructed in a microstrip design.
  • This variant also has in Ver same as an oscillator made in cavity technology, essential advantages in terms of space requirements, weight, production and operational reliability.
  • any planar antenna designed in microstrip construction can be used as an antenna within the scope of the invention.
  • a microstrip antenna In comparison to known horn antennas, such as those used in devices for space monitoring using Doppler radar, such a microstrip antenna is not only distinguished by its flat, space-saving design and particularly simple manufacture. It also has the advantage that any desired antenna characteristics can be achieved in a simple manner by appropriate design and arrangement of the individual microstrip elements. This advantage is particularly important in the case of devices for room monitoring, since a good adaptation of the antenna to the room to be monitored is of essential importance for an optimal function.
  • planar antenna designed in microstrip construction is that it is particularly simple with this construction, a circular or elliptical polarization to achieve the antenna beam. As a result, a mutual influence of devices arranged opposite one another in the space to be monitored can be reduced in a simple manner.
  • the detector of the device according to the invention which is designed in microstrip construction.
  • An expedient configuration of the invention provides that the FET-Os zillator also forms the detector.
  • Another variant uses a diode detector, in particular a Schottky junction diode, as the detector.
  • FIG. 3 shows in a very schematic form the main components of the device for space monitoring according to the invention.
  • an insulating plate 6 which corresponds to the insulating plate 2 or 4 of the embodiments according to FIGS. 1 and 2 are an oscillator 7, an antenna 8 and a connecting section 9 - all in microstrip design on the same carrier material (insulating plate 6) - arranged.
  • the details of possible embodiments of the oscillator 7, the antenna 8 and the connecting section 9 (which can also contain a detector) are explained in more detail below with the aid of a few examples.
  • 4 shows an exemplary embodiment of the oscillator
  • a GaAs field effect transistor (FET) 10 the connections of which are designated G, D and S in the usual way.
  • the feedback takes place via a dielectric resonator 11, the dimensions of which determine the oscillator frequency.
  • the source connections S end in a piece of microstrip line, the length and impedance of which produce the optimal coupling to the resonator 11.
  • the dielectric resonator 11 is located in the vicinity of the line 12 connected to the gate connection. In this way, a feedback between source S and gate G is established.
  • the line 12 connected to the gate is terminated by an impedance formed by L 1 and R 2 , which prevents self-excitation of the FET.
  • the line 13 connected to the drain connection leads to the output.
  • C 1 is a coupling capacitor.
  • the supply voltage is supplied via a low-pass filter formed by L 2 and C 2 .
  • the inductance L 3 represents a high impedance for the oscillator frequency, so that most of the power reaches the output 14 of the oscillator via the capacitor C 1 .
  • the resistor R 1 ensures that when the bias voltage V is applied, the drain terminal D is always positively biased against the gate G. This results in a limitation of the current flowing through the drain connection when switching on.
  • FIGS. 5 and 6 A further exemplary embodiment of an oscillator 7 which can be used in the device according to the invention in a microstrip design is illustrated in FIGS. 5 and 6.
  • This oscillator uses a Gunn diode 15 which is arranged in the insulating plate 6. With their existing on the underside of the insulating plate 6 to the Gunn diode 15 is connected to a metal cap 16, which serves as a heat sink that dissipates the heat developed and at the same time produces a good ground connection of the Gunn diode.
  • the diode is supplied with power via a low-pass filter 17 implemented in printed circuit technology on the insulating plate 6.
  • the oscillator also includes a dielectric resonator 11 and a capacitor 18 which is arranged in the line 20 leading to the output 19.
  • the FET oscillator forms gate 21 is also the essential element of the detector.
  • the oscillator 21 feeds the antenna 22 with microwave power.
  • the reflected signals shifted by the Doppler frequency pass from the antenna 22 back to the oscillator 21 and cause one in the oscillator
  • FIG. 8 Another exemplary embodiment of a suitable detector is shown in FIG. 8.
  • the essential element of this detector is a diode 24, which is connected to a branch 25, via which the microwave power supplied by the oscillator 26 is divided between the two antennas 27 and 28.
  • the entire connecting lines between the oscillator 26 and the antennas 27, 28 are arranged in a microstrip design.
  • FIG. 1 Another embodiment of a detector (for generating an output signal corresponding to the difference between the transmission and reception frequency) is illustrated in FIG.
  • a Schottky junction diode 29 is used as the detector. It is connected directly to the microstrip line 30 which is connected to the antenna and the oscillator.
  • the other connection of the Schottky junction diode 29 stands out with a printed circuit led low-pass filter 31 in connection, which passes the Doppler signals, but suppresses the microwaves generated by the oscillator.
  • the double output signal can be picked up at terminals A, B.
  • An inductor 32 prevents microwaves from reaching port A and thereby impairing the efficiency of the detector.
  • Fig.10 shows an embodiment of a usable in the device according to the invention, formed in micro stripe design antenna. It is arranged on an insulating plate 33, which also forms the support for the oscillator and the detector.
  • the antenna contains two antenna elements 34, 35, which each consist of strip-like conductors pointing in the opposite direction and are fed with microwave energy via a common connection 36 from the oscillator (not shown).
  • FIG. 11 shows a further exemplary embodiment of an antenna constructed in microstrip design, in which the individual strips of the two antenna elements 37 and 38 are offset from one another by 90 °. In this way a circular polarization of the antenna beam can be achieved.
  • FIG. 12 shows an exemplary embodiment in which the components of the monitoring device are arranged in a somewhat different way on the insulating plate 39 serving as a common carrier material than in the case of
  • the oscillator 7 and the connecting section 9 (containing a detector diode and lines for power distribution) are provided approximately in the middle of the insulating plate 39.
  • An antenna 40 or 41 is arranged on each side of this circuit group, the antenna elements of these antennas being offset from one another by 90 °, so that a circular or elliptical polarization of the antenna beam can be achieved.

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Waveguide Aerials (AREA)

Abstract

Dans un dispositif de surveillance locale à radar Doppler, l'oscillateur, l'antenne, le détecteur et les conduites de connexion de ces éléments sont formés selon une construction en microbandes et agencés sur le même matériau de support. On obtient ainsi une construction plate et qui occupe peu de place, de fabrication simple et un appareil ayant un fonctionnement très fiable.
EP19830900839 1982-03-12 1983-03-08 Dispositif de surveillance locale a radar doppler Withdrawn EP0102977A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3209094 1982-03-12
DE19823209094 DE3209094A1 (de) 1982-03-12 1982-03-12 Vorrichtung zur raumueberwachung mittels doppler-radar

Publications (1)

Publication Number Publication Date
EP0102977A1 true EP0102977A1 (fr) 1984-03-21

Family

ID=6158112

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19830900839 Withdrawn EP0102977A1 (fr) 1982-03-12 1983-03-08 Dispositif de surveillance locale a radar doppler

Country Status (3)

Country Link
EP (1) EP0102977A1 (fr)
DE (1) DE3209094A1 (fr)
WO (1) WO1983003309A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3322304A1 (de) * 1983-06-21 1985-01-03 Siemens AG, 1000 Berlin und 8000 München Streifenleitungsdopplerradar
FR2575554B1 (fr) * 1984-12-28 1987-01-23 Radiotechnique Compelec Module hyperfrequence pour radar doppler dans la bande k
US4742354A (en) * 1986-08-08 1988-05-03 Hughes Aircraft Company Radar transceiver employing circularly polarized waveforms
DE3821215C2 (de) * 1988-06-23 1993-11-18 Deutsche Aerospace Geschwindigkeits-Wegstrecken-Sensor für Kraftfahrzeuganordnungen
DE3840449A1 (de) * 1988-12-01 1990-06-07 Telefunken Systemtechnik Anordnung zur messung der horizontalen und/oder vertikalen geschwindigkeitskomponente eines relativ zu einem zweiten objekt bewegten ersten objekts
DE59309609D1 (de) * 1993-08-09 1999-07-01 Siemens Ag Dopplerradarmodul in Mikrostreifenleitungstechnik
JP2003084058A (ja) * 2001-09-10 2003-03-19 Hitachi Ltd 誘電体共振器型発振器及びそれを用いた送受信モジュール
DE102017223471A1 (de) * 2017-12-20 2019-06-27 Robert Bosch Gmbh Vorrichtung zum Aussenden und Empfangen elektromagnetischer Strahlung

Family Cites Families (18)

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Publication number Priority date Publication date Assignee Title
DE7400469U (de) * 1974-04-04 Jungblut H Elektronisches Haus- und Raumschutzgerät
US3671868A (en) * 1970-01-21 1972-06-20 Bendix Corp Superregenerative microwave receiver
FR2177564B1 (fr) * 1972-03-29 1974-08-02 Nathan Guy
FR2231062B1 (fr) * 1973-05-22 1977-11-10 Tacussel Maurice
FR2280240B1 (fr) * 1974-07-26 1977-01-07 Lignes Telegraph Telephon Circuit micro-onde integre a fonctions multiples
JPS52139396A (en) * 1976-05-17 1977-11-21 Hitachi Ltd Doppler radar
DE2638906A1 (de) * 1976-08-28 1978-03-02 Philips Patentverwaltung Ghz-antennenanlage fuer ein doppler-radar im x-band
FR2386049A1 (fr) * 1977-03-30 1978-10-27 Tacussel Marc Radar miniaturise de detection de mouvement
GB1534210A (en) * 1977-11-29 1978-11-29 Standard Telephones Cables Ltd Microwave circuit
JPS5491079U (fr) * 1977-12-09 1979-06-27
JPS54111799A (en) * 1978-02-21 1979-09-01 Mitsubishi Electric Corp Doppler radar unit
JPS54118193A (en) * 1978-03-06 1979-09-13 Mitsubishi Electric Corp Doppler radar device
US4255730A (en) * 1978-10-24 1981-03-10 Hitachi, Ltd. Microwave integrated circuit device
DE2846705C2 (de) * 1978-10-26 1986-07-31 Hitachi, Ltd., Tokio/Tokyo Mikrowellen-Schaltungsanordnung verkoppelt mit einem Hohlleiter
JPS5598380A (en) * 1979-01-22 1980-07-26 Nissan Motor Co Ltd Doppler radar for short distance
FR2453507A1 (fr) * 1979-04-06 1980-10-31 Besse Jean Circuit d'antenne, en particulier pour radar de surveillance volumetrique
FR2476878A1 (fr) * 1980-02-25 1981-08-28 Esteban Michel Detecteur a effet doppler
DE3011238A1 (de) * 1980-03-22 1981-10-01 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Mikrowellen-sende-empfaenger, insbesondere fuer ein doppler-radar-system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8303309A1 *

Also Published As

Publication number Publication date
DE3209094A1 (de) 1983-09-22
WO1983003309A1 (fr) 1983-09-29

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

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STAA Information on the status of an ep patent application or granted ep patent

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Effective date: 19840215

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Inventor name: SIMPSON, IAN