IT991535B - Dispositivo per la trasmissione di radiazioni elettromagnetiche - Google Patents

Dispositivo per la trasmissione di radiazioni elettromagnetiche

Info

Publication number
IT991535B
IT991535B IT7050872A IT7050872A IT991535B IT 991535 B IT991535 B IT 991535B IT 7050872 A IT7050872 A IT 7050872A IT 7050872 A IT7050872 A IT 7050872A IT 991535 B IT991535 B IT 991535B
Authority
IT
Italy
Prior art keywords
transmission
electromagnetic radiations
radiations
electromagnetic
Prior art date
Application number
IT7050872A
Other languages
English (en)
Original Assignee
Elliott Brothers London Ltd
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 Elliott Brothers London Ltd filed Critical Elliott Brothers London Ltd
Application granted granted Critical
Publication of IT991535B publication Critical patent/IT991535B/it

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00—Secret communication
    • H04K1/02—Secret communication by adding a second signal to make the desired signal unintelligible
    • 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
    • G01S13/76—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein pulse-type signals are transmitted
    • G01S13/78—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein pulse-type signals are transmitted discriminating between different kinds of targets, e.g. IFF-radar, i.e. identification of friend or foe
    • 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
    • G01S7/36—Means for anti-jamming, e.g. ECCM, i.e. electronic counter-counter measures
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00—Secret communication
    • H04K1/10—Secret communication by using two signals transmitted simultaneously or successively
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K3/00—Jamming of communication; Counter-measures
    • H04K3/80—Jamming or countermeasure characterized by its function
    • H04K3/82—Jamming or countermeasure characterized by its function related to preventing surveillance, interception or detection
    • H04K3/827—Jamming or countermeasure characterized by its function related to preventing surveillance, interception or detection using characteristics of target signal or of transmission, e.g. using direct sequence spread spectrum or fast frequency hopping
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K2203/00—Jamming of communication; Countermeasures
    • H04K2203/30—Jamming or countermeasure characterized by the infrastructure components
    • H04K2203/32—Jamming or countermeasure characterized by the infrastructure components including a particular configuration of antennas

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar Systems Or Details Thereof (AREA)
IT7050872A 1971-11-09 1972-11-08 Dispositivo per la trasmissione di radiazioni elettromagnetiche IT991535B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5204771 1971-11-09

Publications (1)

Publication Number Publication Date
IT991535B true IT991535B (it) 1975-08-30

Family

ID=10462445

Family Applications (1)

Application Number Title Priority Date Filing Date
IT7050872A IT991535B (it) 1971-11-09 1972-11-08 Dispositivo per la trasmissione di radiazioni elettromagnetiche

Country Status (3)

Country Link
DE (1) DE2254785A1 (it)
FR (1) FR2159375B1 (it)
IT (1) IT991535B (it)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2622419C3 (de) * 1976-05-20 1980-09-11 Messerschmitt-Boelkow-Blohm Gmbh, 8000 Muenchen Einrichtung zur Verhinderung absichtlicher Störungen von drahtlosen Ortungsund Kommandoübertragungssystemen durch Aussendung systemunabhängiger Signale
DE3248544C2 (de) * 1982-12-29 1984-11-22 Siemens AG, 1000 Berlin und 8000 München System zur Informationsübertragung mittels Infrarotstrahlung

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2463502A (en) * 1942-05-21 1949-03-08 Tung Sol Lamp Works Inc Method and system of secret communication
US2426992A (en) * 1942-05-27 1947-09-09 Sperry Gyroscope Co Inc Glide path transmitter
US2476337A (en) * 1943-01-22 1949-07-19 Sperry Corp Secret radio communication
US2792493A (en) * 1950-01-05 1957-05-14 Westinghouse Electric Corp Secrecy transmission system

Also Published As

Publication number Publication date
FR2159375A1 (it) 1973-06-22
DE2254785A1 (de) 1973-05-17
FR2159375B1 (it) 1976-06-04

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