FR2357114A1 - Microwave radio link repeater system - has three frequency changer stages which reduce special filtering requirement - Google Patents

Microwave radio link repeater system - has three frequency changer stages which reduce special filtering requirement

Info

Publication number
FR2357114A1
FR2357114A1 FR7619974A FR7619974A FR2357114A1 FR 2357114 A1 FR2357114 A1 FR 2357114A1 FR 7619974 A FR7619974 A FR 7619974A FR 7619974 A FR7619974 A FR 7619974A FR 2357114 A1 FR2357114 A1 FR 2357114A1
Authority
FR
France
Prior art keywords
frequency
stages
radio link
repeater system
changer
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Withdrawn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
FR7619974A
Other languages
French (fr)
Inventor
Philippe Legendre
Bernard Peleta
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.)
Thales SA
Original Assignee
Thomson CSF 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 Thomson CSF SA filed Critical Thomson CSF SA
Priority to FR7619974A priority Critical patent/FR2357114A1/en
Priority to IT50015/77A priority patent/IT1079953B/en
Priority to SE7707479A priority patent/SE7707479L/en
Priority to DE19772729371 priority patent/DE2729371A1/en
Priority to JP7769777A priority patent/JPS533717A/en
Priority to NO772305A priority patent/NO772305L/en
Publication of FR2357114A1 publication Critical patent/FR2357114A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations
    • H04B7/165—Ground-based stations employing angle modulation

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Radio Relay Systems (AREA)
  • Braking Arrangements (AREA)
  • Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)

Abstract

The radio link repeater system consists of a receiver and transmitter operating in the Gigahertz region with a frequency separation of several Megahertz. The receiver is connected to a frequency changer fed from a mixer oscillator (7). The amplified intermediate frequency is fed to a second changer stage (4) whose oscillator (5) has a frequency which is the same as the difference between the relay receive and transmit frequencies. The second intermediate frequency is further converted in a third mixer (6) driven from the oscillator (7) common to the first mixer stage. Apart from bandpass filtering in the last two frequency-changer stages, no special filtering arrangements are required.
FR7619974A 1976-06-30 1976-06-30 Microwave radio link repeater system - has three frequency changer stages which reduce special filtering requirement Withdrawn FR2357114A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
FR7619974A FR2357114A1 (en) 1976-06-30 1976-06-30 Microwave radio link repeater system - has three frequency changer stages which reduce special filtering requirement
IT50015/77A IT1079953B (en) 1976-06-30 1977-06-28 REPEATER FOR HERTZIAN BEAM
SE7707479A SE7707479L (en) 1976-06-30 1977-06-28 RADIO TRANSMISSION COVER
DE19772729371 DE2729371A1 (en) 1976-06-30 1977-06-29 RELAY POINT FOR A DIRECT RADIO CONNECTION
JP7769777A JPS533717A (en) 1976-06-30 1977-06-29 Radio link repeater
NO772305A NO772305L (en) 1976-06-30 1977-06-29 RADIO LINK RELESTATION.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7619974A FR2357114A1 (en) 1976-06-30 1976-06-30 Microwave radio link repeater system - has three frequency changer stages which reduce special filtering requirement

Publications (1)

Publication Number Publication Date
FR2357114A1 true FR2357114A1 (en) 1978-01-27

Family

ID=9175069

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7619974A Withdrawn FR2357114A1 (en) 1976-06-30 1976-06-30 Microwave radio link repeater system - has three frequency changer stages which reduce special filtering requirement

Country Status (6)

Country Link
JP (1) JPS533717A (en)
DE (1) DE2729371A1 (en)
FR (1) FR2357114A1 (en)
IT (1) IT1079953B (en)
NO (1) NO772305L (en)
SE (1) SE7707479L (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2619478A1 (en) * 1987-08-10 1989-02-17 Rousselie Jacques Retransmitter with direct amplification for extending the zone of coverage of a radio section

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2619478A1 (en) * 1987-08-10 1989-02-17 Rousselie Jacques Retransmitter with direct amplification for extending the zone of coverage of a radio section

Also Published As

Publication number Publication date
DE2729371A1 (en) 1978-01-05
IT1079953B (en) 1985-05-16
NO772305L (en) 1978-01-02
SE7707479L (en) 1977-12-31
JPS533717A (en) 1978-01-13

Similar Documents

Publication Publication Date Title
MX9702721A (en) Wide band radio-frequency converter having multiple use of intermediate frequency translators.
EP0398688A3 (en) Procedure for forming frequencies of a digital radio telephone
FR2357114A1 (en) Microwave radio link repeater system - has three frequency changer stages which reduce special filtering requirement
CA1263148C (en) Radio transmitter-receiver system for increasing or decreasing communication channels
DE3566338D1 (en) Improvements in multicoupler systems
JPS5642437A (en) Radio receiver
JPS56144642A (en) Vhf-uhf tuner
US3025516A (en) Frequency control system for radio identification apparatus
GB1309339A (en) Television receiver
GB1504517A (en) Signal separation arrangements
JPS5731235A (en) Receiving system
JPS56103514A (en) Filter circuit
EP0100145A3 (en) Electrical filter comprising resonant circuits
JPS5639643A (en) Receiver
JPS572135A (en) Radio telephone system
GB613902A (en) Improvements in and relating to repeater systems for high frequency electric waves
KR0140677B1 (en) Satellite broadcasting repeater
JPS5521616A (en) Signal unit in audio band
JPS5526737A (en) Direct repeater
GB563520A (en) Improvements in or relating to electrical apparatus including networks suitable for use for dual signal transmission
SU429499A1 (en) DEVICE FOR SYNCHRONIZATION UHF-AUTOGENERATORS
GB1324679A (en) Radio receivers
JPS5568746A (en) Signal reception system
FR2232166A1 (en) Signal processing cct. - uses signals which are delivered by chrominance band-pass amplifier in T.V. receiver
JPS55133151A (en) Mobile radio callout reception system

Legal Events

Date Code Title Description
ST Notification of lapse