System and method for measuring residual phase noise of a frequency mixer
US11095376B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 27, 2020 |
| Grant date | Aug 17, 2021 |
| Priority date | — |
| Expiry date | Nov 27, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B17/104
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Residual noise of a frequency mixer is detected. A reference clock is used to generate a first radio frequency (RF) signal, a second RF signal and a third RF signal. The first RF signal and the second RF signal serve as input to the frequency mixer. The reference clock is used to generate a third RF signal. The reference clock is also used to control timing in a detector device. A second frequency mixer mixes an output of the DUT with the third RF signal to produce an input signal for a detector device. Mixing the output of the DUT with the third RF signal cancels at least some of the phase noise within the output signal of the DUT that results from phase noise in the first RF signal and from phase noise in the second RF signal. The detector device detects residual phase noise existing within the input signal for the detector device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.