Electronically reconfigurable microwave lens and shutter using cascaded frequency selective surfaces and polyimide macro-electro-mechanical systems
US6822622B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 29, 2002 |
| Grant date | Nov 23, 2004 |
| Priority date | — |
| Expiry date | Jul 29, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q15/002
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A radio frequency reconfigurable lens is provided. In particular, a lens comprising at least two opposed frequency selective surface sheets is provided. A relative phase shift may be imparted to an incident radio frequency wave by varying the distance between at least some of the unit cells of a first of the FSS sheets and adjacent unit cells on a second of the FSS sheets. In order to provide a desired phase taper across the width of a lens, and/or to provide different phase shift amounts, pairs of FSS surfaces having controllable columns or rows can be cascaded together. According to an additional aspect of the present invention, radio frequency waves can be scanned by cascading multiple tunable stages. The present invention also provides a radio frequency shutter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.