Six-port reflectometer
US4641082A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 25, 1985 |
| Grant date | Feb 3, 1987 |
| Priority date | — |
| Expiry date | Apr 25, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P3/16
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A six-port reflectometer has first and second directional couplers, a first waveguide and a third directional coupler providing a series connection from a source to a test device. The first coupler is connected to two detectors. The second coupler is connected to a third detector and to a fourth waveguide having two ports connected via a waveguide and a further port connected to an absorber. The third coupler is connected to a detector and a reflector. The second waveguide and the reflector receive radiation coupled by the second and third couplers respectively. The third and fourth couplers provide equivalent transmission paths. Equal path lengths are traversed by signals leaving the second coupler and returning to it from the reflector and the fourth coupler respectively. With broad-band couplers and waveguides, this arrangement gives broad-band performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.