GB803435A - Improvements in or relating to electric direction couplers - Google Patents
Improvements in or relating to electric direction couplersInfo
- Publication number
- GB803435A GB803435A GB31649/55A GB3164955A GB803435A GB 803435 A GB803435 A GB 803435A GB 31649/55 A GB31649/55 A GB 31649/55A GB 3164955 A GB3164955 A GB 3164955A GB 803435 A GB803435 A GB 803435A
- Authority
- GB
- United Kingdom
- Prior art keywords
- conductors
- terminals
- section
- pairs
- ratio
- 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
- H03H7/48—Networks for connecting several sources or loads, working on the same frequency or frequency band, to a common load or source
Landscapes
- Measurement Of Resistance Or Impedance (AREA)
Abstract
803,435. Directional coupling circuits. TELEFONAKTIEBOLAGET L. M. ERICSSON. Nov. 4, 1955 [Nov. 4, 1954], No. 31649/55. Class 40 (8). A directional coupler comprises two conductors each having a number of spaced-apart sections 111, 4111, Fig. 10 (a theoretical diagram), juxtaposed in pairs and connected by loops of equal electrical length, the loops in one conductor connecting the end of each section with the beginning of the next posterior section and in the other conductor connecting the end of each section with the beginning of the next anterior section. The conductors are parts of transmission lines, e.g. the internal conductors of a piar of coaxial lines. It is stated in the Specification that the ratio of the distributed magnetic and electric coupling between the conductors with the above arrangement is - 1 and that, if the four pairs of terminals of the coupler are correctly terminated, no coupling exists between pairs of terminals at the same extremity of the coupler. In one construction (Fig. 4) the inner conductors 11, 41 of coaxial sockets 13, 43 are wound in opposite senses in the grooves of a dielectric core, the conductors crossing each other twice in each loop. Strips 12 of insulating material are provided between the conductors at the crossing points. The outer conductors of the coaxial sockets 13, 43 may be connected to a shield surrounding the windings (Fig. 6, not shown) or to a conductor extending along the axis of the dielectric core (Fig. 7, not shown). In another construction (Fig. 8) the two conductors are wound in the same sense on adjacent formers which are surrounded by an earthed conductor 17. The degree of mismatch between a generator and a load connected respectively to terminals 43, 43, Fig. 4, may be determined by measuring the voltages at the terminals 13, 13. The ratio of the voltages gives the reflection coefficient of the load as a function of frequency. In the modified circuit of Fig. 3 whichincludes a source 2, a load 3, two directional couplers 5, 5<SP>1</SP>, meters 6<SP>1</SP>, 7 and matched terminations 10, the expression giving the reflection coefficient in terms of the ratio of the measured voltages includes no frequency terms. A brief mathematical discussion of the circuits is given in the Specification.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE803435X | 1954-11-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB803435A true GB803435A (en) | 1958-10-22 |
Family
ID=20342651
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB31649/55A Expired GB803435A (en) | 1954-11-04 | 1955-11-04 | Improvements in or relating to electric direction couplers |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR1135082A (en) |
GB (1) | GB803435A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1147638B (en) * | 1961-04-28 | 1963-04-25 | Siemens Ag | Directional coupler for coupling or decoupling high-frequency alternating voltages |
-
1955
- 1955-11-02 FR FR1135082D patent/FR1135082A/en not_active Expired
- 1955-11-04 GB GB31649/55A patent/GB803435A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1147638B (en) * | 1961-04-28 | 1963-04-25 | Siemens Ag | Directional coupler for coupling or decoupling high-frequency alternating voltages |
Also Published As
Publication number | Publication date |
---|---|
FR1135082A (en) | 1957-04-24 |
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