GB1330838A - Transmission systems - Google Patents
Transmission systemsInfo
- Publication number
- GB1330838A GB1330838A GB1330838DA GB1330838A GB 1330838 A GB1330838 A GB 1330838A GB 1330838D A GB1330838D A GB 1330838DA GB 1330838 A GB1330838 A GB 1330838A
- Authority
- GB
- United Kingdom
- Prior art keywords
- common
- line
- common point
- band
- mid
- 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
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/46—Networks for connecting several sources or loads, working on different frequencies or frequency bands, to a common load or source
Landscapes
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
1330838 R.F. couplings MARCONI CO Ltd 6 Nov 1970 [19 Dec 1969] 62153/69 Heading H4A [Also in Division M1] Each one of a plurality of transmitters or receivers is connected through a bandpass filter and a transmission line to a common point, from which a further transmission line is taken to a common load, such as an aerial. Each filter has a different pass band, and the line from it to the common point has a length which is equivalent to an odd number (including unity) of quarterwavelengths at the mid-band operating frequency of the associated transmitter or receiver. The line from the common point to the common load has a length which is equivalent to an odd number (including unity) of quarter-wavelengths at the mid-frequency of the overall operating frequency band of the system. The lines, which may be coaxial cables, each have a characteristic impedance Z 1 equal to kZ 0 , where k is between 0À35 and 0À60, and Z 0 is the impedance of the common load. A formula is given for determining a preferred value of k.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB6215369 | 1969-12-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1330838A true GB1330838A (en) | 1973-09-19 |
Family
ID=10487913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1330838D Expired GB1330838A (en) | 1969-12-19 | 1969-12-19 | Transmission systems |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1330838A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4602229A (en) * | 1983-12-30 | 1986-07-22 | Motorola, Inc. | Resonant bandpass T filter and power splitter |
| US4980661A (en) * | 1989-03-31 | 1990-12-25 | Litton Systems, Inc. | Diplexer for coupling RF signals, as well as a DC sawtooth signal, to an antenna |
| US5281934A (en) * | 1992-04-09 | 1994-01-25 | Trw Inc. | Common input junction, multioctave printed microwave multiplexer |
-
1969
- 1969-12-19 GB GB1330838D patent/GB1330838A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4602229A (en) * | 1983-12-30 | 1986-07-22 | Motorola, Inc. | Resonant bandpass T filter and power splitter |
| US4980661A (en) * | 1989-03-31 | 1990-12-25 | Litton Systems, Inc. | Diplexer for coupling RF signals, as well as a DC sawtooth signal, to an antenna |
| US5281934A (en) * | 1992-04-09 | 1994-01-25 | Trw Inc. | Common input junction, multioctave printed microwave multiplexer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |