Quadrature radio frequency amplifier output network
US7773959B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 25, 2007 |
| Grant date | Aug 10, 2010 |
| Priority date | — |
| Expiry date | Dec 17, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/336
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The present invention provides a quadrature RF amplifier output network that includes a quadrature RF combiner and impedance transformation circuitry. The output network is coupled between a quadrature RF amplifier and an antenna, or other downstream circuitry to optimize net RF power transfer and improve overall power efficiency. The quadrature RF combiner phase-shifts and combines quadrature RF signals from the quadrature RF amplifier into a single combined RF signal that feeds the impedance transformation circuitry. The impedance transformation circuitry transforms an impedance that is presented to the output of the quadrature RF amplifier output network into a desired quadrature impedance that is presented to the outputs of the quadrature RF amplifier. Termination circuitry is coupled to the quadrature RF combiner to capture improperly phased signals, reflected signals, or imbalanced signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.