Re-configurable impedance matching and harmonic filter system
US7567782B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 28, 2006 |
| Grant date | Jul 28, 2009 |
| Priority date | — |
| Expiry date | Jun 13, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/0067
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Methods and apparatus are provided to enable a transceiver (200) or transmitter including a single PA line-up (210) to transmit signals having frequencies in two or more different frequency bands, and/or having two or more different modulation types, and/or having two or more different RF power levels. The single PA line-up includes at least one variable matching circuit (216) and a variable harmonic filter (240) to tune match and tune filter communication signals prior to transmission. The variable matching circuit and the variable harmonic filter each include at least one variable capacitive element (2160 and 2400) that switches ON/OFF depending on whether a low frequency signal or a high frequency signal is being transmitted. Each variable capacitive element includes separate direct current and radio frequency terminals to enable the single PA line-up to change signal modulation and/or RF power levels in addition to frequencies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.