Large diameter RF rotary coupler used with a passive RF sensor
US7782159B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 8, 2006 |
| Grant date | Aug 24, 2010 |
| Priority date | — |
| Expiry date | Mar 8, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P1/068
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A rotary coupler comprises a stator 1 having a first face 3a and a rotor 2 having a second face 4a, the first and second faces 3a, 4a being spaced apart from and facing each other. A first electrically conducting track 5 is provided on the first face 3a of the stator 1 which forms a transmission line and has spaced apart ends A, B and a second electrically conducting track 6 is provided on the second surface 4a of the rotor 2 also forming a transmission line and having spaced apart ends C, D. One end A of the first track 5, in use, is connected to signal generating means and the other end B of the first track is connected to earth through a resistor substantially equal to the characteristic impedance of the transmission line. The first track 5 extends along a generally circular arc substantially around the first face 3a of the stator 1, the first track 5 having a length substantially equal to an integer number of wavelengths of the signal produced, in use, by the signal generating means. The second track (6) extends along a generally circular arc partially around the second face 4a of the rotor 2, the second track 6 having a length substantially equal to one quarter of the waveleng…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.