Variable capacitance module and matching circuit module
US8390392B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 28, 2011 |
| Grant date | Mar 5, 2013 |
| Priority date | — |
| Expiry date | Sep 28, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H7/38
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
In a variable capacitance module capable of achieving necessary variable capacitance ranges, a variable capacitance circuit includes a variable capacitance element and fixed capacitance elements. A first variable capacitance element and a first fixed capacitance element are connected in series, and the series circuit thereof and a second fixed capacitance element are connected in parallel. Accordingly, with reference to the capacitance of the second fixed capacitance element, the range of the combined capacitance of the variable capacitance circuit is provided by a step size of capacitance based on the combined capacitance of the variable capacitance element and the first fixed capacitance element. The first and second fixed capacitance elements are defined by inner-layer flat-plate electrodes in a laminated substrate, and the variable capacitance element is defined by an MEMS element mounted on a top surface of the laminated substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.