Tunable dual-band ferroelectric antenna
US6329959A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 16, 2000 |
| Grant date | Dec 11, 2001 |
| Priority date | — |
| Expiry date | Jun 16, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q21/30
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A multilayer tunable ferroelectric antenna assembly that includes two superimposed substrate layers. A first substrate layer consists of a low dielectric material carrying on one face an electrically ground plane, and on its opposite face an electrically conductive patch serving as an active feeder-resonator. A second substrate includes a ferroelectric material having one face positioned on top of the feeder-resonator and carrying on the opposite face an electrically conductive patch acting as a director. The upper director patch is fed through capacitve coupling of energy from the feeder-resonator. Application of bias voltage between the director and the feeder-resonator changes the permittivity of the ferroelectric substrate, thereby causing a shift in resonance frequency. A radiation null, corresponding to energy absorption, could be tuned into the resonance frequency at which the antenna is previously exhibiting a radiation characteristic. This provides the antenna a means to behave either as a radiator or an absorber at particular frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.