Methods and apparatuses for measuring the distance to a passive intermodulation source
US10498465B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 2019 |
| Grant date | Dec 3, 2019 |
| Priority date | — |
| Expiry date | Feb 28, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/08
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
According to methods of performing measurements to determine a distance to a passive-intermodulation (“PIM”) source, a first RF signal comprising a first frequency and a second RF signal comprising a second frequency may be applied to a device under test. A reference signal comprising a higher-order intermodulation-product of the first frequency and the second frequency may also be generated. An output signal from the device under test and the reference signal may be digitized and a calibration measurement may be applied. A phase difference between the device under test output and the reference signal may be determined. A plurality of phase differences may be determined for multiple first frequencies, and from the plurality of phase differences, a delay may be calculated, which may be multiplied by the velocity of propagation on the medium connecting the device under test to the test equipment to determine a distance to the PIM source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.