Conical spiral antenna
US4675690A · kind A · utility
14Cited by
10References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 25, 1984 |
| Grant date | Jun 23, 1987 |
| Priority date | — |
| Expiry date | May 25, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K1/16
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A photoresist-type chemical etching process is used to define a computer-generated flat pattern of conductors as if a complex conical spiral had been cut apart along a straight line through the apex and laid flat. The substrate in the shape of a circular sector is bent into a cone and the radial edges are joined in a seam. The split turns of the spiral are electrically interconnected across the seam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.