Cable length correction
US7948248B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 6, 2008 |
| Grant date | May 24, 2011 |
| Priority date | — |
| Expiry date | Oct 8, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R17/06
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A transmission line impedance compensation method includes the step of providing a measurement device that is adapted to source a test signal having a frequency to a device under test and to determine a corresponding impedance of the device under test using an auto-balanced bridge technique. A first transmission line, a second transmission line, a third transmission line, and a fourth transmission line are connected to said measurement device. An end of the first transmission line is connected to an end of second transmission line. An end of third transmission line is connected to an end of fourth transmission line. A combined phase delay of the connected first and second transmission lines, and a combined phase delay of the connected third and fourth transmission lines, are measured by the measuring device. The device under test is connected to the first transmission line, the second transmission line, the third transmission line, and the fourth transmission line after measuring the phase delays. The corresponding impedance of the device under test is determined based on both of the phase delays.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.