FR2233668A1 - Electromagnetic microwave surveillance barrier - frontal dimensions are small and receiver element structure is simplified - Google Patents

Electromagnetic microwave surveillance barrier - frontal dimensions are small and receiver element structure is simplified

Info

Publication number
FR2233668A1
FR2233668A1 FR7321660A FR7321660A FR2233668A1 FR 2233668 A1 FR2233668 A1 FR 2233668A1 FR 7321660 A FR7321660 A FR 7321660A FR 7321660 A FR7321660 A FR 7321660A FR 2233668 A1 FR2233668 A1 FR 2233668A1
Authority
FR
France
Prior art keywords
plane
surveillance
barrier
receiver
polarising
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.)
Granted
Application number
FR7321660A
Other languages
French (fr)
Other versions
FR2233668B1 (en
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.)
Radiotechnique Compelec RTC SA
Original Assignee
Radiotechnique Compelec RTC SA
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 Radiotechnique Compelec RTC SA filed Critical Radiotechnique Compelec RTC SA
Priority to FR7321660A priority Critical patent/FR2233668A1/en
Publication of FR2233668A1 publication Critical patent/FR2233668A1/en
Application granted granted Critical
Publication of FR2233668B1 publication Critical patent/FR2233668B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/02—Waveguide horns
    • H01Q13/025—Multimode horn antennas; Horns using higher mode of propagation
    • H01Q13/0258—Orthomode horns
    • 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
    • G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
    • G01S13/75—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors
    • 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
    • G01S7/024—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00 using polarisation effects
    • G01S7/025—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00 using polarisation effects involving the transmission of linearly polarised waves
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2491—Intrusion detection systems, i.e. where the body of an intruder causes the interference with the electromagnetic field

Abstract

Method of establishing a microwave surveillance barrier by actuating a transmitter which directs a beam determining the location of the supervised zone. The receiver is selectively sensitive to electromagnetic waves rectilinearly polarised in a given plane, the transmitter generates a rectilinear polarised wave whose polarisation plane is perpendicular to the plane corresponding to the maximum sensitivity of the receiver and the electromagnetic beam of waves is emitted in the direction of a fixed polarising reflector which deflects the beam in the direction of the transmitter and the receiver whilst simultaneously causing a considerable rotation of the polarising plane of the reflected wave with respect to the polarising plane of the incident wave.
FR7321660A 1973-06-14 1973-06-14 Electromagnetic microwave surveillance barrier - frontal dimensions are small and receiver element structure is simplified Granted FR2233668A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7321660A FR2233668A1 (en) 1973-06-14 1973-06-14 Electromagnetic microwave surveillance barrier - frontal dimensions are small and receiver element structure is simplified

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7321660A FR2233668A1 (en) 1973-06-14 1973-06-14 Electromagnetic microwave surveillance barrier - frontal dimensions are small and receiver element structure is simplified

Publications (2)

Publication Number Publication Date
FR2233668A1 true FR2233668A1 (en) 1975-01-10
FR2233668B1 FR2233668B1 (en) 1978-02-10

Family

ID=9120945

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7321660A Granted FR2233668A1 (en) 1973-06-14 1973-06-14 Electromagnetic microwave surveillance barrier - frontal dimensions are small and receiver element structure is simplified

Country Status (1)

Country Link
FR (1) FR2233668A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0073511A2 (en) * 1981-08-31 1983-03-09 Nec Corporation Satellite broadcasting receiver
FR2667694A1 (en) * 1990-10-05 1992-04-10 Mainardi Jacques Method and system for identifying a given object or point, a polariser-reflector device designed especially for implementing the method, and various applications of the said method of identification
EP0704714A1 (en) * 1994-09-27 1996-04-03 CHL Netherlands B.V. Microwave passing sensor having a special reflector

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR990098A (en) * 1948-07-06 1951-09-17 Stin Method of detection by electromagnetic waves of a selected object located among other analogues and apparatus for its implementation

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR990098A (en) * 1948-07-06 1951-09-17 Stin Method of detection by electromagnetic waves of a selected object located among other analogues and apparatus for its implementation

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0073511A2 (en) * 1981-08-31 1983-03-09 Nec Corporation Satellite broadcasting receiver
EP0073511A3 (en) * 1981-08-31 1985-05-22 Nec Corporation Satellite broadcasting receiver
FR2667694A1 (en) * 1990-10-05 1992-04-10 Mainardi Jacques Method and system for identifying a given object or point, a polariser-reflector device designed especially for implementing the method, and various applications of the said method of identification
EP0704714A1 (en) * 1994-09-27 1996-04-03 CHL Netherlands B.V. Microwave passing sensor having a special reflector
NL9401570A (en) * 1994-09-27 1996-05-01 Chl Netherlands Bv Microwave pass sensor with special reflector.

Also Published As

Publication number Publication date
FR2233668B1 (en) 1978-02-10

Similar Documents

Publication Publication Date Title
US3745575A (en) Method of detecting subsurface objects
US3882503A (en) Wave detection apparatus
US3879719A (en) Flat beam intruder detection device
FR2233668A1 (en) Electromagnetic microwave surveillance barrier - frontal dimensions are small and receiver element structure is simplified
GB1489554A (en) Method for classifying timber
US2990544A (en) Radar antenna system providing improved resolution
GB1339955A (en) Apparatus for detecting an object by reflection of radiation
GB1270806A (en) Improvements relating to aerial arrangements
SU463273A3 (en) The method of acoustic control of the surface density of materials
US2850728A (en) Radio navigation aiding devices
US3939342A (en) Device for measuring an angular deviation by heterodyne detection
US2593071A (en) Object motion indicating system
GB1374948A (en) Intrusion detection system
JPS57125868A (en) Side looking aperture radar
GB1430550A (en) Systems for the transmission of positional information
US3945005A (en) Surveillance radar
US2958863A (en) Radio direction finders
US2958080A (en) Scanning system for detecting a radiant object in a field of like radiation
GB1365475A (en) Intrusion dtection system
US2981946A (en) Antenna feed system
JPS5517464A (en) Artificial radar signal generator
JPS5242395A (en) Radar unit
GB1351107A (en) Range sensitive devices
JPS5235595A (en) Moving object detection system
GB984144A (en) Improvements in or relating to luneberg lens reflectors for electromagnetic waves

Legal Events

Date Code Title Description
ST Notification of lapse