Gimballed antenna
US4926188A · kind A · utility
2Cited by
10References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 21, 1986 |
| Grant date | May 15, 1990 |
| Priority date | — |
| Expiry date | May 21, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q1/005
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A modified subterranean antenna structure for use in boreholes that pivotally balances a separate core member within the hollow interior of a fixed winding member in order to filter out mechanically induced vibrations from the core. The mechanical natural resonant frequency of the core is reduced and becomes less than the lowest electromagnetic signal frequency intended to be transmitted to and received by the subterranean antenna. In this way, mechanically induced vibrations will not create mechanically generated frequency signals sympathetic to the frequencies chosen for the antenna communication band frequencies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.