Conductive rubber antennas having improved physical and electrical properties
US4246217A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 30, 1978 |
| Grant date | Jan 20, 1981 |
| Priority date | — |
| Expiry date | Oct 30, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q1/00
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A radio antenna is made of conductive rubber. Uncured rubber is doped with conductive high structure carbon black in proportions greater than normally required to attain the desired volume resistivity. The doped rubber is milled at high shear until the standard deviation of volume resistivity is reduced below a predetermined value in the finished antennas. A copper-containing metallic stud is embedded in at least one end of the uncured antennas and is bonded to the rubber by vulcanization during curing of the rubber. The antenna has improved physical properties, uniformity of volume resistivity, and reduced resistivity variation with stress.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.