Frequency selective microwave devices using narrowband metal materials
US6473048B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 9, 2001 |
| Grant date | Oct 29, 2002 |
| Priority date | — |
| Expiry date | Jul 9, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q19/065
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A microwave device operating at a selected frequency band or group of selected frequency bands of interest includes a resonant bulk material having one or more conductivity bandwidths corresponding to the selected frequency band or group of selected frequency bands of interest. The resonant bulk material exhibits conductive properties at a frequency or frequencies within the one or more conductivity bandwidths and non-conductive properties at all other frequencies, and includes a narrowband metal material having a Lorentz resonance frequency or frequencies within the selected frequency band or group of selected frequency bands of interest. In a preferred embodiment, the resonant bulk material includes lossy material particles arranged for absorbing radiation at the frequency or frequencies within the one or more conductivity bandwidths; and a resonant coating of the narrowband metal material coating around the lossy material particles, the coating having a Lorentz resonance frequency or frequencies within the selected frequency band or group of selected frequency bands of interest. Alternatively, the resonant bulk material can be used to construct wave guiding or wave scattering de…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.