Substrate-type non-reciprocal circuit element and integrated circuit having multiple ground surface electrodes and co-planar electrical interface
US6437654B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 19, 1998 |
| Grant date | Aug 20, 2002 |
| Priority date | — |
| Expiry date | Nov 19, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2924/0002
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A substrate-type non-reciprocal circuit element comprises a substrate, a ferrite embedded in the substrate, a central electrode formed on the ferrite at one principal surface of the substrate, a plurality of signal conductors formed on the one principal surface of the substrate to extend from the central electrode into a plurality of different outward directions, a first ground electrode formed on the one principal surface of the substrate, separately from the central electrode and the plurality of signal conductors, and a second ground electrode formed on the other principal surface of the substrate and electrically connected to the first ground electrode. Thus, the substrate-type non-reciprocal circuit element can be easily electrically connected to a measurement machine, to enable to precisely and easily measure an electrical characteristics with a good repeatability. In addition, the substrate-type non-reciprocal circuit element can be connected to an electric circuit such as a receiver circuit and a transmitter circuit with a low transmission loss and a low variation in the transmission loss.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.