Double layer circularly polarized antenna with single feed
US5703601A · kind A · utility
32Cited by
3References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 9, 1996 |
| Grant date | Dec 30, 1997 |
| Priority date | — |
| Expiry date | Sep 9, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q9/0428
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A circularly polarized antenna is described having a ground plane and spa conductive patches parallel to it forming lower and upper cavities. The lower cavity is excited by a coax introduced at an impedance matching point in the ground plane, and the upper cavity is energized by apertures in the middle patch. The sides of the lower cavity from which radiation does not emanate are shorted to the ground plane, and the sides of the upper cavity from which radiation does not emanate as shorted to the middle patch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.