Polarization rotationer
US6720840B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 15, 2002 |
| Grant date | Apr 13, 2004 |
| Priority date | — |
| Expiry date | Aug 15, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P1/065
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A waveguide structure that has two rotating parts changes the polarization of a radio frequency signal in two steps or one step. The waveguide structure includes input and output waveguides and a polarization rotator. The output waveguide includes two cavities corresponding to two polarizations. The rotator includes cut-away portions of a rectangular shape which are rotated with respect to each other and the first wave guide by predetermined angles. When the second waveguide is rotated from one cavity to another, the rotator is also rotated, thereby changing the polarization of the signals passing through the waveguide. In addition, if the rotator and the second waveguide are interlocked, then the number of steps required to accomplish the polarization change can be reduced to one, because rotation of the second waveguide will cause the rotation of the polarization rotator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.