Antenna device and radio communication apparatus
US8754826B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 2, 2011 |
| Grant date | Jun 17, 2014 |
| Priority date | — |
| Expiry date | Nov 25, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q1/521
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An antenna device that includes an antenna having a single feed and a shunt circuit. The shunt circuit includes a first shunt matching circuit causing impedance, viewed from a main path connecting the antenna and a radio frequency circuit, to be substantially infinite with respect to all frequency ranges handled by the antenna, and a second shunt matching circuit providing a predetermined impedance characteristic with respect to a first subset of the frequency ranges handled by the antenna. Each of the first and second shunt matching circuits are selectively connected to the main path, and a selection controller of the antenna device controls selection of which of the first and second shunt matching circuits are connected to the main path.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.