JPS5526737A - Direct repeater - Google Patents
Direct repeaterInfo
- 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
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.
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)
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 |
-
1978
- 1978-08-17 JP JP9946878A patent/JPS5526737A/en active Granted
Cited By (5)
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 |
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