Meanderline polarization twister
US4786914A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 25, 1985 |
| Grant date | Nov 22, 1988 |
| Priority date | — |
| Expiry date | Jan 25, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q15/248
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A polarization twister for twisting the polarization of a wide angle incident electromagnetic wave is described. Specifically, the polarization twister includes a reflector for reflecting the wide angle incident electromagnetic wave, a dielectric substrate having a longitudinal axis, a spacer bonded on a first side thereof to the dielectric substrate and on a second side thereof to the reflector, and an array of meanderline conductive strips etched on the dielectric substrate. Each meanderline conductive strip has an axis extending at a 45.degree. angle with respect to the longitudinal axis of the dielectric substrate. In operation, the meanderline conductive strips serve to advance the phase of a parallel component of an incident E-field vector, and delay the phase of the perpendicular component thereof. Accordingly, the reflected field has its polarization twisted 90.degree. from the incident polarization.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.