Band-pass filter for electromagnetic radiation
US5166826A · kind A · utility
7Cited by
3References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 25, 1991 |
| Grant date | Nov 24, 1992 |
| Priority date | — |
| Expiry date | Oct 25, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P1/20
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
In a band-pass filter for electromagnetic radiation comprising a membrane having periodically arranged slot structure elements formed therein each consisting of at least three slots of equal length extending from a common point in radial symmetry, the membrane with the slot elements has a thickness of 33 to 500 .mu.m and the ratio of the membrane thickness to the grating constant which defines the periodic arrangement of the slot structure elements is larger than 1, thereby achieving optimum blocking characteristics for the filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.