Dual-path amplifier having reduced harmonic distortion
US11522500B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 6, 2019 |
| Grant date | Dec 6, 2022 |
| Priority date | — |
| Expiry date | Mar 17, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K2201/09227
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An embodiment of a dual-path amplifier includes a power splitter connected to first and second power amplifiers respectively connected to first and second transmission lines connected to a power combiner having a phase-offset deficit at the second harmonic frequency 2f0, where the first and second transmission lines are designed to provide a complementary phase offset at 2f0 substantially equal to the phase-offset deficit such that the two amplified signals will be combined at the power converter with a total phase offset at 2f0 of about 180 degrees in order to reduce harmonic distortion in the amplified output signal, without substantially diminishing the output power at the fundamental frequency f0. In certain PCB-based implementations, the transmission lines include metal traces and lumped elements providing different impedance transformations that achieve the complementary phase offset, where the metal traces may have significantly different physical and electrical characteristics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.