Wide band directional coupler
US4311974A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 9, 1980 |
| Grant date | Jan 19, 1982 |
| Priority date | — |
| Expiry date | Jun 9, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H7/482
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A directional coupler for sampling energy traversing a CATV system of the type wherein wide band television signals are extracted from a coaxial transmission line situated at points located at varying distances from the line amplifier. The coupler includes a voltage sensing transformer in shunt with the center and outer conductors of the cable and a current sensing transformer in series with the center conductor. The transformers are wound to provide the coupler with a relatively low tap value. Windings in the shunt transformer are used to internally boost the impedance at the input to the series transformer to maximize return losses and directivity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.