ES450224A1 - Radio-relay systems - Google Patents
Radio-relay systemsInfo
- Publication number
- ES450224A1 ES450224A1 ES450224A ES450224A ES450224A1 ES 450224 A1 ES450224 A1 ES 450224A1 ES 450224 A ES450224 A ES 450224A ES 450224 A ES450224 A ES 450224A ES 450224 A1 ES450224 A1 ES 450224A1
- Authority
- ES
- Spain
- Prior art keywords
- additional signals
- signals
- fed
- directions
- coupling
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/54—Circuits using the same frequency for two directions of communication
- H04B1/58—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
-
- 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
- H04B7/15528—Control of operation parameters of a relay station to exploit the physical medium
- H04B7/15535—Control of relay amplifier gain
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Radio Relay Systems (AREA)
- Amplifiers (AREA)
- Transmitters (AREA)
- Circuits Of Receivers In General (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Abstract
Improvements in circuits for coupling and decoupling additional signals in directional radio transmission installations, especially repetitive stations by coupling and uncoupling said signals in the system devices, which normally serve for the transmission of wider modulation bands and in which additional signals are fed in the receiver mixers of both directions by modulation of their heterodyne oscillators, characterized in that additional signals obtained in the receivers of both directions by demodulation of corresponding partial bands in the intermediate frequency path, are fed to an electronic hybrid terminal circuit, in which the counter phase of parts of the same frequency and the same phase of one direction is effected, and the additional signal of the opposite direction is obtained in pure form. (Machine-translation by Google Translate, not legally binding)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19752533711 DE2533711C2 (en) | 1975-07-28 | Circuit for coupling and decoupling additional signals in radio relay systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES450224A1 true ES450224A1 (en) | 1977-09-01 |
Family
ID=5952642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES450224A Expired ES450224A1 (en) | 1975-07-28 | 1976-07-28 | Radio-relay systems |
Country Status (12)
| Country | Link |
|---|---|
| JP (1) | JPS597248B2 (en) |
| BE (1) | BE844601A (en) |
| DK (1) | DK337276A (en) |
| ES (1) | ES450224A1 (en) |
| FI (1) | FI63139C (en) |
| FR (1) | FR2320010A1 (en) |
| GB (1) | GB1557193A (en) |
| IE (1) | IE44371B1 (en) |
| IT (1) | IT1067158B (en) |
| LU (1) | LU75151A1 (en) |
| NL (1) | NL172201C (en) |
| NO (1) | NO142645C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59126839U (en) * | 1983-02-08 | 1984-08-27 | 長屋産業株式会社 | Teitsuke Skabar |
-
1976
- 1976-06-11 LU LU75151A patent/LU75151A1/xx unknown
- 1976-06-24 GB GB26226/76A patent/GB1557193A/en not_active Expired
- 1976-07-02 IE IE1463/76A patent/IE44371B1/en unknown
- 1976-07-12 FR FR7621296A patent/FR2320010A1/en active Granted
- 1976-07-16 JP JP51084920A patent/JPS597248B2/en not_active Expired
- 1976-07-16 NO NO762504A patent/NO142645C/en unknown
- 1976-07-27 IT IT25727/76A patent/IT1067158B/en active
- 1976-07-27 DK DK337276A patent/DK337276A/en unknown
- 1976-07-27 FI FI762144A patent/FI63139C/en not_active IP Right Cessation
- 1976-07-28 ES ES450224A patent/ES450224A1/en not_active Expired
- 1976-07-28 BE BE169313A patent/BE844601A/en unknown
- 1976-07-28 NL NLAANVRAGE7608353,A patent/NL172201C/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| NO142645C (en) | 1980-09-24 |
| NL172201B (en) | 1983-02-16 |
| FR2320010B1 (en) | 1980-11-28 |
| NL7608353A (en) | 1977-02-01 |
| FI63139C (en) | 1983-04-11 |
| JPS5216120A (en) | 1977-02-07 |
| JPS597248B2 (en) | 1984-02-17 |
| NO142645B (en) | 1980-06-09 |
| DE2533711B1 (en) | 1976-12-02 |
| FR2320010A1 (en) | 1977-02-25 |
| FI762144A7 (en) | 1977-01-29 |
| BE844601A (en) | 1976-11-16 |
| AU1570176A (en) | 1976-11-11 |
| LU75151A1 (en) | 1977-01-25 |
| NL172201C (en) | 1983-07-18 |
| IE44371L (en) | 1977-01-28 |
| NO762504L (en) | 1977-01-31 |
| IT1067158B (en) | 1985-03-12 |
| DE2533711A1 (en) | 1976-12-02 |
| IE44371B1 (en) | 1981-11-04 |
| DK337276A (en) | 1977-01-29 |
| FI63139B (en) | 1982-12-31 |
| GB1557193A (en) | 1979-12-05 |
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