Microwave phase modulation with liquid crystals
US5194972A · kind A · utility
11Cited by
7References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 18, 1992 |
| Grant date | Mar 16, 1993 |
| Priority date | — |
| Expiry date | Feb 18, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q21/0043
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A liquid crystal is used as the phase modulating medium in a microwave phase modulating cell (20). Applied electric and/or magnetic fields transverse to the direction of wave propagation create a birefringence that changes the velocity of wave propagation and the index of refraction of the medium. The phase modulating cell (20) is used singly or in arrays to direct microwave beams.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.