Tunable notch filter
US11788887B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 24, 2021 |
| Grant date | Oct 17, 2023 |
| Priority date | — |
| Expiry date | Mar 24, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J2003/1247
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A tunable notch filter for operation in reflection mode comprises an antenna layer positioned on a transmissive substrate and a mirror layer positioned on a support substrate. The antenna layer and the mirror layer are positioned on opposite sides of a gap and facing each other, the gap having a gap distance. The notch filter is tuned by adjusting the gap distance between the antenna layer and the mirror layer. Tuning the notch filter to a selected state can cause the filter to selectively attenuate the reflection of at least some electromagnetic radiation that is incident on the transmissive substrate and enters the notch filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.