Half wave plate
US4841260A · kind A · utility
0Cited by
5References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 14, 1987 |
| Grant date | Jun 20, 1989 |
| Priority date | — |
| Expiry date | Jan 14, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P5/04
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A microwave device including a half wave plate for a microwave power combiner, attenuator or variable coupler divider having a circular waveguide portion and a pair of cavities disposed opposite to one another and each coupled to a plurality of slots formed in a wall between said cavities and said circular waveguide. The half wave plate is used to obtain a phase shift in the signals provided to one end of the circular waveguide and is preferably mounted for rotary motion about the center axis of the circular waveguide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.