Title:
FERROELECTRIC DEVICES AND METHOD RELATING THERETO
Document Type and Number:
WIPO Patent Application WO2002091409
Kind Code:
A3
Abstract:
The present invention relates to an electrically controllable/tunable microwave device (10) comprising a ferroelectric substrate (101) with a variable dielectric permittivity and conducting electrodes (102, 103A-C), arranged on said substrate, and the capacitance of which depends on applied voltage C(V). the microwave device comprises at least two sections or parts of the substrate/electrodes for each of which different electrical field strengths are generated upon voltage application. Said generated electrical field strengths are controlled by means of the design of the device and/or the voltage application such that the slope (dC(dV) of the voltage dependence of the capacitance (C(V)) of the microwave device can be controlled.
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Inventors:
GEVORGIAN SPARTAK (SE)
WIKBORG ERLAND (SE)
WIKBORG ERLAND (SE)
Application Number:
PCT/SE2002/000898
Publication Date:
May 04, 2006
Filing Date:
May 08, 2002
Export Citation:
Assignee:
ERICSSON TELEFON AB L M (SE)
GEVORGIAN SPARTAK (SE)
WIKBORG ERLAND (SE)
GEVORGIAN SPARTAK (SE)
WIKBORG ERLAND (SE)
International Classes:
H01P7/00; H01G7/06; H01P7/10; H03H9/21; H01L; (IPC1-7): H01G7/06; H01P7/10
Domestic Patent References:
| WO1996042118A1 | 1996-12-27 |
Foreign References:
| US5495438A | 1996-02-27 | |||
| US5472935A | 1995-12-05 |
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