Bi-directional signal coupler method and apparatus
US6426970B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 20, 1998 |
| Grant date | Jul 30, 2002 |
| Priority date | — |
| Expiry date | Oct 20, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/583
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A bi-directional signal coupler is incorporated into a transmission/reception communication system and is used for the transmission and reception of signals over a single transmission medium. The bi-directional signal coupler includes a primary nulling device for removing a signal to be transmitted through the bi-directional signal coupler from a signal to be received into the bi-directional signal coupler. The primary removing device provides an output signal representative of the signal to be received plus the signal to be transmitted wherein a level of the signal to be transmitted is removed to a first extent relative to a level of the signal to be received. At least one additional secondary device is provided for removing the signal to be transmitted from the signal to be received in a successive manner. The at least one additional secondary removing device operates upon the output signal of the primary removing device and is disposed for successively providing a further reduction in the level of the signal to be transmitted relative to the level of the signal to be received. A method of bi-directional signal coupling is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.