Compact diplexer
US5793265A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 30, 1997 |
| Grant date | Aug 11, 1998 |
| Priority date | — |
| Expiry date | May 30, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H7/46
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A diplexer for use in communication of telephony and high-speed data transmission, including television, comprises two filters, each of which is constructed with plural stages in the form of a ladder network, one of the filters being a high-pass filter and the other of the filters being a low-pass filter. The filter components, inductors and capacitors, are located on one or opposed sides of a dielectric substrate. The filter components are arranged to minimize interference between signals traveling in the low-pass filter and the high-pass filter. In the case of a parallel branch of the ladder network in each of the filters, wherein the parallel branch comprises a resonant circuit of inductor and capacitor, the branches of the respective filters are located at opposite parts of the array of the filter components. Inductors are constructed as toroids and, in an embodiment of the invention wherein inductors are located on a top side of the substrate with the capacitors being located on the bottom side of the substrate, the toroids are mounted on the substrate with the toroidal planes being perpendicular to a plane of the substrate and wherein the inductors of three successive stages …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.