Broad beam monofilar helical antenna for circularly polarized radio waves
US6166709A · kind A · utility
4Cited by
9References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 12, 1999 |
| Grant date | Dec 26, 2000 |
| Priority date | — |
| Expiry date | Jul 12, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q1/362
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A broad beam helical antenna contains a monofilar winding of a constant helical diameter and large valued pitch angle. The diameter of the helical antenna is defined such that its circumference is slightly less than one wavelength of the circular polarized radio waves. The pitch angle lies in a relatively high range on the order of 18.degree. to 24.degree.. These parameters provide a generally uniform gain over a relatively wide beam angle on the order of 60.degree. off boresight. Such gain-uniformity facilitates maintaining a link between a satellite and mobile platform-mounted communication equipment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.