JPS5526737A - Direct repeater - Google Patents

Direct repeater

Info

Publication number
JPS5526737A
JPS5526737A JP9946878A JP9946878A JPS5526737A JP S5526737 A JPS5526737 A JP S5526737A JP 9946878 A JP9946878 A JP 9946878A JP 9946878 A JP9946878 A JP 9946878A JP S5526737 A JPS5526737 A JP S5526737A
Authority
JP
Japan
Prior art keywords
filter
circulator
frequency
output
amplifier
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
JP9946878A
Other languages
Japanese (ja)
Other versions
JPS5733732B2 (en
Inventor
Takuro Oguchi
Masaji Honma
Toshio Kikuchi
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP9946878A priority Critical patent/JPS5526737A/en
Publication of JPS5526737A publication Critical patent/JPS5526737A/en
Publication of JPS5733732B2 publication Critical patent/JPS5733732B2/ja
Granted 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Superheterodyne Receivers (AREA)
  • Radio Relay Systems (AREA)

Abstract

PURPOSE:To obtain a simple and miniature circuit constitution and also to reduce its power consumption, by reducing the number of stages of amplifiers to half by making use of branching filter circuits. CONSTITUTION:This device consists of 1st and 2nd branching filter circuits 11 and 13, amplifier 12, and frequency shift circuit 14. After passing through filter 15 and circulator 16, received wave (f1) is amplified 12 and then inputted to mixer 19 by way of circulator 17 and filter 18 and mixer 19 shifts it to frequency (f2) by the output of frequency shift oscillator 20 and then sends its output via filter 21 to circulator 16, whose output is reflected by filter 15 turning to frequency (f1) and then inputted to amplifier 12. Next, the output of amplifier 12 is supplied to circulator 17, where it is reflected by filter 18 tuning to (f1) and outputted (frequency f2) from transmitting antenna 10 via filter 22.
JP9946878A 1978-08-17 1978-08-17 Direct repeater Granted JPS5526737A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9946878A JPS5526737A (en) 1978-08-17 1978-08-17 Direct repeater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9946878A JPS5526737A (en) 1978-08-17 1978-08-17 Direct repeater

Publications (2)

Publication Number Publication Date
JPS5526737A true JPS5526737A (en) 1980-02-26
JPS5733732B2 JPS5733732B2 (en) 1982-07-19

Family

ID=14248134

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9946878A Granted JPS5526737A (en) 1978-08-17 1978-08-17 Direct repeater

Country Status (1)

Country Link
JP (1) JPS5526737A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0085940A2 (en) * 1982-02-04 1983-08-17 Nec Corporation Service channel signal transmission system
EP0118997A2 (en) * 1983-02-10 1984-09-19 Fujitsu Limited Direct relay equipment
EP1821428A1 (en) * 2004-11-25 2007-08-22 Kabushiki Kaisha Kobe Seiko Sho Wireless communication apparatus

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0085940A2 (en) * 1982-02-04 1983-08-17 Nec Corporation Service channel signal transmission system
EP0118997A2 (en) * 1983-02-10 1984-09-19 Fujitsu Limited Direct relay equipment
US4764979A (en) * 1983-02-10 1988-08-16 Fujitsu Limited Direct relay equipment
EP1821428A1 (en) * 2004-11-25 2007-08-22 Kabushiki Kaisha Kobe Seiko Sho Wireless communication apparatus
EP1821428A4 (en) * 2004-11-25 2010-01-06 Kobe Steel Ltd Wireless communication apparatus

Also Published As

Publication number Publication date
JPS5733732B2 (en) 1982-07-19

Similar Documents

Publication Publication Date Title
KR900004119A (en) LNB for simultaneous reception of C / ku-band satellite broadcasting
JPS5526737A (en) Direct repeater
JPS5627507A (en) Loop antenna unit
JPS5642437A (en) Radio receiver
JPS56103514A (en) Filter circuit
JPS5631235A (en) Active antenna system
JPS5514777A (en) Tuner
JPS5776935A (en) Tuner
JPS55137707A (en) Multistage amplifier of microwave band
FR2441292A1 (en) Short to long wave converter for radio receiver - has separate mixer and local oscillator for long waves and selected signal fed to amplifier
JPS55105408A (en) Reception frequency converting device
JPS5745703A (en) Output frequency stabilizing circuit for microwave oscillator
KR890004512A (en) Low noise frequency converter for both C-band and Ku-band of satellite broadcasting
JPS54136760A (en) Alarming device for washer
JPS55160872A (en) Doppler speedometer
JPS53131738A (en) Branching circuit
JPS5772434A (en) Communication system
JPS54101215A (en) Heterodyne relay unit of hot standby type
JPS57111150A (en) Radio communication system
JPS5711506A (en) Mixing circuit
JPS6420717A (en) Synchronizing signal generator
JPS5793703A (en) Frequency converter
JPS57204616A (en) Filter circuit
JPS5485624A (en) Direct-shift repeating installation
JPS5467471A (en) Electronic watch with receiver