Apparatus for controlling impedance in adaptive tuning antenna circuit
US8872720B2 · kind B2 · utility
5Cited by
1References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 13, 2010 |
| Grant date | Oct 28, 2014 |
| Priority date | — |
| Expiry date | Aug 2, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/0458
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An apparatus for controlling impedance in an adaptive tuning antenna circuit is disclosed, wherein a matching unit is connected to an output terminal where a coupler outputs a coupled power of a transmission signal, a controller adjusts an impedance of the matching unit to cause the reflected power outputted by the coupler to be minimized, and the controller adjusts an impedance of a tuner to allow a combined impedance of the tuner and an antenna to be equal to the impedance of the matching unit but with opposite phases, thereby adjusting the impedance of the antenna in the optimal state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.