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WO1999035510A1 - Detecteur de radar a bandes multiples - Google Patents

Detecteur de radar a bandes multiples Download PDF

Info

Publication number
WO1999035510A1
WO1999035510A1 PCT/US1999/000357 US9900357W WO9935510A1 WO 1999035510 A1 WO1999035510 A1 WO 1999035510A1 US 9900357 W US9900357 W US 9900357W WO 9935510 A1 WO9935510 A1 WO 9935510A1
Authority
WO
WIPO (PCT)
Prior art keywords
signal
ghz
signal detection
detection device
frequency
Prior art date
Application number
PCT/US1999/000357
Other languages
English (en)
Inventor
David C. Oliva
Philip E. Thistlethwaite
Anthony Mirabelli
Original Assignee
Cobra Electronics Corp.
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 Cobra Electronics Corp. filed Critical Cobra Electronics Corp.
Priority to AU21078/99A priority Critical patent/AU2107899A/en
Publication of WO1999035510A1 publication Critical patent/WO1999035510A1/fr

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
    • G01S7/021—Auxiliary means for detecting or identifying radar signals or the like, e.g. radar jamming signals
    • G01S7/022—Road traffic radar detectors

Definitions

  • the present invention relates generally to the detection of speed monitoring signals and traffic warning signals to warn, or otherwise advise, travelers of various speed detection devices and traffic hazards in their particular vicinity.
  • the detector includes a signal detection means, a traffic alert means, and a local oscillator shutdown means and/or a local oscillator frequency shifting means.
  • the detector includes a signal detection means.
  • the signal detection means is capable of detecting signals along multiple predetermined frequency bands. It is contemplated that the detector further comprises a traffic alert means.
  • This traffic alert means includes a visual display, an audible, or both.
  • the radar/laser detector comprises a local oscillator shutdown means.
  • This local oscillator shutdown means is activated when the unit detects a radar detector detecting gun. These detecting guns are used by others to determine which travelers are employing speed monitoring device detection equipment.
  • the local oscillator shutdown means will turn the oscillator to a momentary idle mode so that the radar/laser detector will go undetected by a detecting gun.
  • FIGURE 1 is a simplified block electrical diagram of an embodiment of a detector in accordance with the present invention.
  • the radar/laser detector of the present invention includes a signal detection means, a traffic alert means, and a local oscillator shutdown means and/or a local oscillator frequency shifting means.
  • the signal detection means is designed to differentiate between signals having multiple predetermined frequencies .
  • the signal detection means is contemplated to identify preferably six bands comprising: X band at 10.525 GHz ⁇ 25 MHz, VG-2 at 11.4 GHz - 11.7 GHz, traffic warning signals at 24.07 GHz, 24.11 GHz, and 24.23 GHz, railroad warning signals at 24.11 and 24.19 GHz, K band at 24.150 GHz ⁇ 100 MHz, Ka band at 33.4 to 36.0 GHz, and lasers at 300 THz to 375 THz .
  • the detector 10 includes a signal detection means 12 having a plurality of frequency monitor circuits 14j . _ N operably connected between a signal receiver 16 and a detector circuit 18.
  • Each monitor circuit 14 1-N includes a wide band IF amplifier 20 operably connected between an input mixer 22 and an output mixer 24.
  • Connected to the input mixer 22 of each monitor circuit 14 1 _ N is a preselected local oscillator reference signal 28 ! _ N and an output from the signal receiver 16.
  • the local oscillator reference signal 28 ⁇ is provided by a selectable filter and switch bank 26 receiving from a comb frequency generator 30 a comb of frequencies .
  • the comb frequency generator 30 is responsive to an oscillator signal 31 produced by a master oscillator 32 having a precise frequency and a low level of noise .
  • the comb of frequencies produced by the comb frequency generator 30 in response to oscillator signal 31 include discrete steps ⁇ of a reference frequency f, that is f, f + l ⁇ ,f + 2 ⁇ , f + 3 ⁇ , f + 4 ⁇ , ..., etc.
  • each step ⁇ is a 500 MHz increment.
  • the switch 26 is controlled by a select input 58 for passing desired components of the comb of frequencies to the input mixers 22 X . N of the monitor circuits 14 1 _ N .
  • the input mixer 22 of each monitor circuit 14 X _ N provides a difference or intermediate frequency 34 comprising the difference between the output of the signal receiver 16 and the local oscillator reference signal 28.
  • the IF amplifier 20 produces an amplified output 36 received by the output mixer 24.
  • the output mixer 24 receives a swept local oscillator signal 38 from a frequency generator 39.
  • the output mixer 24 provides a difference or intermediate frequency output 40 comprising the difference between amplifier output 36 and the swept local oscillator signal 38.
  • the outputs 40 of the monitor circuits 14 are received by the detector circuit 18 having a narrow band IF amplifier 42 and one or more detectors 44.
  • the IF amplifier 42 amplifies and passes the outputs 40 to the detectors 48 for determining whether a signal having specific characteristics has been received at signal input 16. If desired, the detectors 48 can check for both input signal characteristics and codes .
  • the detectors 44 are operably coupled to an alert means 50 having an audible alarm 52 and a visual alarm 54. Accordingly, the detectors 44 enable the alarms upon detection of a speed monitoring signal or traffic warning signal . Also responsive to the output of at least one detector 44 is a control block 56 for disabling the comb frequency generator 30 or, in another embodiment, shifting the frequency outputs of the comb frequency generator 30.
  • monitor circuit l ⁇ is configured for identifying X-band signals over a selectable detection frequency range.
  • the switch bank 26 is configured, via select input 58, to assert one of a selectable set of discrete frequencies as local oscillator reference signal 28,. By providing for the selection of discrete frequencies, the frequency range monitored by circuit 14] . is likewise adjusted for avoiding unwanted or noisy frequencies .
  • the local oscillator reference signal 28j has a frequency equal to the center frequency of the desired detection frequency range plus the center frequency of the wide band IF amplifier 20j .
  • the reference local oscillator reference signal 28 preferably has a frequency of about 12.500 GHz for a selected detection range of about 10.250 GHz to about 10.750 GHz and IF amplifier 20j . having a center frequency of 2 GHz (i.e., 2GHz + (10.750GHz + 10.25GHz) /2 ) .
  • the input mixer 22 provides intermediate signal 34 in response to the selected local oscillator reference input signal 28i and the input signal provided by receiver 16.
  • receiver 16 includes a conventional antenna having filters for preventing signals at unwanted frequencies from being passed to the input mixer 22j .
  • the antenna can include other filters for preventing outward radiation from the antenna of internally generated radio frequency signals.
  • the wide band IF amplifier 20j amplifies and passes to the output mixer 24 l t via output path 36j, intermediate frequency signal 34 1 within a bandwidth centered around a preselected center frequency.
  • IF amplifier 20 x has a bandwidth of about 500 MHz with a center frequency of about 2 GHz.
  • Output mixer 24 provides a monitor circuit output 40i in response to the IF amplifier output 36 1 and signal 38 x from local oscillator 39 x that is swept about the same center frequency as provided by IF amplifier 20 ⁇
  • the swept local oscillator 39 has a center frequency of about 2 GHz and is preferably swept by about +/-250Mhz for ensuring reception of X-band over the entire spectrum of X-band.
  • the monitor circuit output 40 1 is received, via 10.7 MHz narrow band IF amplifier 42, by detector 44 x for enabling alarms 52 and 54 upon detection of a signal over the detected frequency range.
  • this portion of the detector 10 is preferably configured for identifying K-band signals over a selectable detection frequency range.
  • switch bank 26 is configured to assert a selected discrete frequency from comb generator 30 as local oscillator reference input signal 28 2 .
  • reference signal 28 2 preferably has a frequency of about 26.000 GHz for a selected detection range of about
  • the wide band IF amplifier 20 2 amplifies and passes to output mixer 24 2 , via output path 36 2 , intermediate frequency signal 34 2 generated by input mixer 22 2 and within a 500 MHz bandwidth centered around the preferred center frequency of about 2 GHz.
  • Output mixer 24 2 generates monitor circuit output 40 2 in response to the IF amplifier output 36 2 and signal 38 2 from local oscillator 39 2 that is swept by about +/- 250 MHz about the same 2 GHz center frequency as that of wide band IF amplifier 20 2 . Accordingly, reception is provided over the entire K-band spectrum. Monitor circuit output 40 2 is received by detector 44 2 , via narrow band IF amplifier 42. Upon detection of an appropriate signal over the detected frequency range (e.g., 23.750 GHz to 24.250 GHz), detector 44 2 enables alarms 52 and 54.
  • an appropriate signal over the detected frequency range (e.g., 23.750 GHz to 24.250 GHz)
  • detector 44 2 Upon detection of an appropriate signal over the detected frequency range (e.g., 23.750 GHz to 24.250 GHz), detector 44 2 enables alarms 52 and 54.
  • monitor circuit 14 N can be configured for identifying Ka- band signals within one or more selected signal detection frequency ranges.
  • switch bank 26 can be configured to provide one or more discrete frequencies from comb generator 30 as reference input 28 N .
  • reference input 28 2 provides: 1) a frequency of about
  • Wide band IF amplifier 20 N passes to output mixer 24 N , via path 36 N , intermediate frequency signal 34 N generated by input mixer 22 2 and having a bandwidth centered around the preferred center frequency of about 2 GHz with about a 500 MHz bandwidth.
  • Mixer 24 2 generates output 40 N in response to the IF amplifier output 36 N and signal 38 N received from local oscillator 39 N that is swept by about +/- 250 MHz around the matching 2 GHz center frequency of IF amplifier 20 2 . Accordingly, reception is provided over the entire Ka-band spectrum.
  • Monitor circuit output 40 N is received by detector 44 2 wherein alarms 52 and 54 are enabled upon detection of an appropriate signal over the detected frequency range .
  • the traffic alert means 50 comprises audible alarm 52, visual alarm 54, or both.
  • the traffic alert means 50 is designed to warn travelers of the presence of a speed monitoring device or a potential or actual traffic hazard.
  • the signal detection means 12 senses the presence of one of a plurality of predetermined signals, the traffic alert means 50 is activated to notify the traveler that a signal has been received.
  • the traffic alert means can include bell -type alarms or the like and/or light emitting diodes or the like.
  • the traffic alert means can also be used to inform the traveler of the strength of the signal received.
  • block 56 can provide a local oscillator shutdown means that is activated when VG-2 frequencies are detected by one of the detection circuits 14.
  • VG-2 frequencies are employed by detecting guns to detect the presence of a radar detector in a traveler's vehicle.
  • This local oscillator shutdown means will momentarily idle the oscillator 32 or frequency generator 30 so that the radar/laser detector will go undetected by the detecting gun.
  • the traffic alert means is activated via feedback path 60. This function insures that the traveler is warned of the presence of a radar detector detecting gun.

Landscapes

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

Abstract

Ce dispositif de détection de signaux (10) servant à déterminer la présence d'une ou de plusieurs fréquences de signal dans une pluralité de fréquences prédéterminées de signal prédéterminées est pourvu d'un oscillateur (32). Cet oscillateur (32), qui fonctionne sur une fréquence prédéterminée distincte, est pourvu d'un mécanisme de détection de signaux (18) et d'un dispositif (50) avisant un voyageur de la présence d'une ou de plusieurs fréquences prédéterminées de signal. Le mécanisme de détection de signaux (18) est à même de faire la distinction entre plusieurs fréquences prédéterminées différentes.
PCT/US1999/000357 1998-01-07 1999-01-07 Detecteur de radar a bandes multiples WO1999035510A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU21078/99A AU2107899A (en) 1998-01-07 1999-01-07 Multiple-band radar detector

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US7063398P 1998-01-07 1998-01-07
US60/070,633 1998-01-07
US22600299A 1999-01-06 1999-01-06
US09/226,002 1999-01-06

Publications (1)

Publication Number Publication Date
WO1999035510A1 true WO1999035510A1 (fr) 1999-07-15

Family

ID=26751351

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1999/000357 WO1999035510A1 (fr) 1998-01-07 1999-01-07 Detecteur de radar a bandes multiples

Country Status (2)

Country Link
AU (1) AU2107899A (fr)
WO (1) WO1999035510A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014010070A (ja) * 2012-06-29 2014-01-20 Furuno Electric Co Ltd レーダ受信機、及びこれを備えたレーダ装置
WO2019242794A1 (fr) * 2018-06-22 2019-12-26 Tu Dresden Dispositif radar et procédé de fonctionnement d'un dispositif radar

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4196393A (en) * 1977-10-28 1980-04-01 Glar Ban Company Microwave signal detector
US4906999A (en) * 1989-04-07 1990-03-06 Harrah David G Detection system for locating aircraft
US4961074A (en) * 1987-12-23 1990-10-02 B.E.L-Tronics Limited Multiband radar detector
US5239296A (en) * 1991-10-23 1993-08-24 Black Box Technologies Method and apparatus for receiving optical signals used to determine vehicle velocity
US5268689A (en) * 1992-03-06 1993-12-07 Yupiteru Industries Co., Ltd. Multi-band microwave detector
US5389930A (en) * 1992-04-14 1995-02-14 Yupiteru Industries Co., Ltd. Power saving type multi-band microwave detector
US5446923A (en) * 1994-03-03 1995-08-29 B.E.L.-Tronics Limited Mixer using fundamental frequency or second or third harmonic frequencies of a local oscillator for maximized resultant frequency mixer product
US5461383A (en) * 1993-07-19 1995-10-24 Yupiteru Industries Co., Ltd. Wideband microwave detector

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4196393A (en) * 1977-10-28 1980-04-01 Glar Ban Company Microwave signal detector
US4961074A (en) * 1987-12-23 1990-10-02 B.E.L-Tronics Limited Multiband radar detector
US4906999A (en) * 1989-04-07 1990-03-06 Harrah David G Detection system for locating aircraft
US5239296A (en) * 1991-10-23 1993-08-24 Black Box Technologies Method and apparatus for receiving optical signals used to determine vehicle velocity
US5268689A (en) * 1992-03-06 1993-12-07 Yupiteru Industries Co., Ltd. Multi-band microwave detector
US5389930A (en) * 1992-04-14 1995-02-14 Yupiteru Industries Co., Ltd. Power saving type multi-band microwave detector
US5461383A (en) * 1993-07-19 1995-10-24 Yupiteru Industries Co., Ltd. Wideband microwave detector
US5446923A (en) * 1994-03-03 1995-08-29 B.E.L.-Tronics Limited Mixer using fundamental frequency or second or third harmonic frequencies of a local oscillator for maximized resultant frequency mixer product

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014010070A (ja) * 2012-06-29 2014-01-20 Furuno Electric Co Ltd レーダ受信機、及びこれを備えたレーダ装置
WO2019242794A1 (fr) * 2018-06-22 2019-12-26 Tu Dresden Dispositif radar et procédé de fonctionnement d'un dispositif radar
US11953583B2 (en) 2018-06-22 2024-04-09 Technische Universität Dresden Radar assembly and method for operating a radar assembly

Also Published As

Publication number Publication date
AU2107899A (en) 1999-07-26

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