Broadband predistortion linearizer with automatic temperature compensation for microwave amplifiers
US5576660A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 5, 1995 |
| Grant date | Nov 19, 1996 |
| Priority date | — |
| Expiry date | May 5, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/198
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A predistortion linearizer for microwave power amplifiers has a linear channel and a non-linear channel. Both channels are made up of the same units. Each channel includes a variable phase-shifter, a variable attenuator and an amplifier. Each channel can further include a fixed attenuator. The two channels are coupled at their ends by couplers each introducing a phase-shift of 90.degree. so that the total phase-shift is 180.degree.. Because the components of the two channels are the same, any variations with the frequency or the amplitude of the signal or with the operating temperature cancel out. The linearizer has applications in telecommunications and in particular in multicarrier systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.