Correction of transmission line induced phase and amplitude errors in reflectivity measurements
US11215655B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 12, 2015 |
| Grant date | Jan 4, 2022 |
| Priority date | — |
| Expiry date | Apr 6, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/4004
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Various examples of methods and systems are disclosed for correction of phase and amplitude errors that occur in transmission lines connecting transmitter/receiver devices to measurement fixtures. In one example, a method is described that includes using time domain processing to determine a phase shift from the measurement fixture that can occur between calibration measurements and measurements of the specimen under test. In another example, a method is described that includes frequency-domain processing of the signals to obtain both phase and amplitude corrections. Including these phase and amplitude corrections in the calibration procedure can reduce or minimize the errors induced in the measurements when the transmission line(s) experience either temperature changes or physical deflections, among other things.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.