Transfer unit for radio frequency signals and method for alternatively using an electrical antenna or a magnetic antenna with a classic antenna tuner
US8982007B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 4, 2009 |
| Grant date | Mar 17, 2015 |
| Priority date | — |
| Expiry date | Jul 1, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H7/38
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A transfer unit for transferring a radio frequency signal between a classical antenna tuner and an antenna where the transfer unit comprises a switch for alternatively selecting a first direct route for the radio frequency signal between the tuner and the antenna or a second route via a reactive element; said reactive element comprising a variable serial capacitance and a shunt inductance connected to system earth; and where a control unit controls the switch and is adapted to select the first route when the frequency is above a predetermined value and otherwise select the second route. The variable serial capacitance comprises a set of capacitors organized as a set of binary weighted parallel capacitance values, and the transfer unit further comprises switches to engage or disengage each capacitor from the reactive element to increase or decrease the resulting capacitance as the radio frequency is decreased or increased. The control unit can use a subset of the capacitors for one range of frequencies and a different subset of the capacitors for a different range of frequencies. The control unit can alternatively measure the radio frequency by means of a sensor or receive frequency…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.