Apparatus and methods for tuning antenna impedance using transmitter and receiver parameters
US6993297B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 12, 2002 |
| Grant date | Jan 31, 2006 |
| Priority date | — |
| Expiry date | Jan 22, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/504
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
According to some embodiments of the present invention, an impedance transformation circuit is provided for use with a transmitter, a receiver, and an antenna. The transmitter may provide transmission signals for transmission by the antenna. The antenna may provide received signals having an associated signal parameter to the receiver. The impedance transformation circuit includes an impedance adjusting circuit and a controller. The impedance adjusting circuit is connected between the antenna, the receiver, and the transmitter. The impedance adjusting circuit is configured to change an impedance difference presented between at least one of: 1) the transmitter and the antenna, and 2) the antenna and the receiver, in response to a control signal. The controller generates the control signal to change the presented impedance difference in response to a signal parameter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.