RF interferometer
US4758776A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 29, 1986 |
| Grant date | Jul 19, 1988 |
| Priority date | — |
| Expiry date | Sep 29, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R27/06
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An RF interferometer is provided in which a power source is connected via first and second directional couplers to a load or device under test. The second coupler is connected to a second detector sampling power incident on the load. The first coupler is connected to a first detector arranged to detect power arising from vector combinations of source voltage and load-reflected voltage. The first coupler is also connected to a three position switch disposed to present any one of three reflecting arrangements to coupled source power. The reflecting arrangements consist of a short-circuited first waveguide, an open circuited second waveguide and a directional coupler having two ports remote from the switch connected together by a third waveguide. Operation of the switch furnishes three different vector combinations of source and load-reflected voltage for measurement by the first detector. This is equivalent to the result achieved by a six-port reflectometer, but with reduced dependence on the frequency stability of components.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.