FR2367377A1 - Modulateurs de frequence pour systemes de transmission a faisceaux hertziens - Google Patents

Modulateurs de frequence pour systemes de transmission a faisceaux hertziens

Info

Publication number
FR2367377A1
FR2367377A1 FR7630685A FR7630685A FR2367377A1 FR 2367377 A1 FR2367377 A1 FR 2367377A1 FR 7630685 A FR7630685 A FR 7630685A FR 7630685 A FR7630685 A FR 7630685A FR 2367377 A1 FR2367377 A1 FR 2367377A1
Authority
FR
France
Prior art keywords
oscillators
transmission systems
modulators
frequency modulators
surface wave
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
FR7630685A
Other languages
English (en)
Other versions
FR2367377B1 (fr
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to FR7630685A priority Critical patent/FR2367377A1/fr
Priority to GB41437/77A priority patent/GB1539482A/en
Publication of FR2367377A1 publication Critical patent/FR2367377A1/fr
Priority to US05/961,482 priority patent/US4271504A/en
Application granted granted Critical
Publication of FR2367377B1 publication Critical patent/FR2367377B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation

Landscapes

  • Transmitters (AREA)
  • Transceivers (AREA)
  • Radio Relay Systems (AREA)

Abstract

Ces modulateurs de fréquence utilise des oscillateurs à ondes élastiques de surface. Chaque modulateur comporte deux oscillateurs à ondes élastiques de surface dont les fréquences centrales sont décalées. Les oscillateurs sont à commande par tension continue appliquée à une entrée de commande. Ces entrées sont alimentées en opposition de phase par le signal modulant Les sorties des oscillateurs sont mélangées dans un mélangeur dont le signal de sortie est appliqué à un filtre passe-bande centré sur la valeur correspondant au décalage des fréquences. Le filtre délivre le signal modulé en fréquence autour de cette valeur. Ces modulateurs sont notamment utilisables dans les systèmes de transmission à faisceaux hertziens.
FR7630685A 1976-10-07 1976-10-07 Modulateurs de frequence pour systemes de transmission a faisceaux hertziens Granted FR2367377A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR7630685A FR2367377A1 (fr) 1976-10-07 1976-10-07 Modulateurs de frequence pour systemes de transmission a faisceaux hertziens
GB41437/77A GB1539482A (en) 1976-10-07 1977-10-05 Frequency modulators for use in microwave links
US05/961,482 US4271504A (en) 1976-10-07 1978-11-17 Frequency modulators for use in microwave links

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7630685A FR2367377A1 (fr) 1976-10-07 1976-10-07 Modulateurs de frequence pour systemes de transmission a faisceaux hertziens

Publications (2)

Publication Number Publication Date
FR2367377A1 true FR2367377A1 (fr) 1978-05-05
FR2367377B1 FR2367377B1 (fr) 1979-06-01

Family

ID=9178675

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7630685A Granted FR2367377A1 (fr) 1976-10-07 1976-10-07 Modulateurs de frequence pour systemes de transmission a faisceaux hertziens

Country Status (3)

Country Link
US (1) US4271504A (fr)
FR (1) FR2367377A1 (fr)
GB (1) GB1539482A (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4684853A (en) * 1985-08-13 1987-08-04 Emhart Industries, Inc. Garage door opener using transmitter with SAW oscillator modulator
CA1279899C (fr) * 1985-08-13 1991-02-05 Notifier Company Systeme de securite a emetteur d'ondes acoustiques de surface

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3249897A (en) * 1963-03-26 1966-05-03 Theodore R Trilling Frequency modulator having voltage variable capacitance means
GB1451664A (en) * 1973-06-06 1976-10-06 Nat Res Dev Surface acoustic wave oscillators
US3855548A (en) * 1973-10-18 1974-12-17 Rockwell International Corp Ultra high frequency single mode oscillation controlled by a surface acoustic wave crystal
GB1483735A (en) * 1973-11-09 1977-08-24 Secr Defence Acoustic wave oscillator

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NEANT *

Also Published As

Publication number Publication date
US4271504A (en) 1981-06-02
FR2367377B1 (fr) 1979-06-01
GB1539482A (en) 1979-01-31

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Legal Events

Date Code Title Description
ST Notification of lapse