Systems and methods for generating and transmitting ULF/VLF signals
US10122475B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 14, 2017 |
| Grant date | Nov 6, 2018 |
| Priority date | — |
| Expiry date | Nov 14, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B13/02
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A system for generating and transmitting ULF/VLF signals comprises a plurality of MEMS transmitter devices arranged in an array. Each transmitter device includes a first ground plane; a beam coupled to the first ground plane by an anchor, such that the beam extends over and is spaced apart from the first ground plane; an electret coupled to the beam and spaced apart from the first ground plane; an electrical bias drive coupled to the beam to generate a stress on the beam; and a second ground plane spaced above the beam. The system also comprises a vibration drive stage operatively coupled to each transmitter device. The vibration drive stage synchronically drives each transmitter device such that each electret vibrates in a substantially perpendicular direction with respect to the first and second ground planes. Each electret also vibrates at substantially the same modulated frequency to generate and transmit ULF/VLF signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.