Method of forming a helical waveguide using a deposit screen
US5030329A · kind A · utility
5Cited by
1References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 17, 1989 |
| Grant date | Jul 9, 1991 |
| Priority date | — |
| Expiry date | Mar 17, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P11/002
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method for forming a helical waveguide uses a deposit screen such as tape to prevent the deposit of unwanted material between the turns of the helix. The waveguide is formed by electroplating of nickel on a mandrel. The mandrel has raised portions similar to a screw on which the waveguide is formed. The deposit screen is placed in the recessed areas between the raised areas on the mandrel to prevent the mandrel from being plated in these areas. This prevents the turns of the helix from touching each other. The resultant helix is easily removed without damage to the waveguide or mandrel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.