Electromagnetic energy shield
US4684954A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 19, 1985 |
| Grant date | Aug 4, 1987 |
| Priority date | — |
| Expiry date | Aug 19, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q15/002
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A radome shutter structure for preventing the transmission of electromagnetic energy within a selected frequency range and for permitting the transmission of energy outside such frequency range during a first mode of operation and for permitting the transmission of electromagnetic energy over a relatively wide frequency range which includes such selected frequency range during a second mode of operation. The structure includes an insulative substrate having a symmetrical array of metallized regions, each region preferably in the form of a Jerusalem Cross having discontinuous arms interconnected by diode elements which are placed in a conductive state in the first mode of operation and in a non-conductive state in the second mode of operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.