Surface-Acoustic-Wave (SAW) Filter for Suppressing Intermodulation Distortion
AssigneeRf360 Europe GmbH
InventorsVikrant Chauhan, Markus Mayer, Werner Ruile, Andreas Mayer, Elena Mayer
Life of this patent
Estimating the term…
Abstract
An apparatus is disclosed for a surface-acoustic-wave filter that suppresses intermodulation distortion. In an example aspect, the apparatus includes a surface-acoustic-wave filter including an electrode structure and at least one layer of quartz material with a thickness having a range approximately from 100 to 300 micrometers. The apparatus also includes at least one layer of lithium niobate (LiNbO3) material disposed between the electrode structure and the quartz material. A thickness of the lithium niobate material has a range approximately from 0.2 to 0.4 micrometers.
Claims30
An apparatus comprising:
- a surface-acoustic-wave filter comprising:
- an electrode structure;
- at least one layer of quartz material with a thickness having a range approximately from 100 to 300 micrometers;
- and
- at least one layer of lithium niobate (LiNbO3) material disposed between the electrode structure and the quartz material, a thickness of the lithium niobate material having a range approximately from 0.2 to 0.4 micrometers.
An apparatus comprising:
- a surface-acoustic-wave filter configured to generate a filtered signal from a radio-frequency signal, the surface-acoustic-wave filter comprising:
- means for converting the radio-frequency signal to an acoustic wave and converting a propagated acoustic wave into the filtered signal;
- softening means for propagating the acoustic wave across a planar surface to produce the propagated acoustic wave;
- and
- hardening means for supporting the softening means, the softening means and the hardening means having respective thicknesses that enable the surface-acoustic-wave filter to behave substantially linearly.
A method comprising:
- providing at least one layer of quartz material with a thickness having a range approximately from 100 to 300 micrometers;
- providing at least one layer of lithium niobate (LiNbO3) material on a surface of the quartz material, a thickness of the lithium niobate material having a range approximately from 0.2 to 0.4 micrometers;
- and
- providing an electrode structure on a surface of the lithium niobate material.
An apparatus comprising:
- a surface-acoustic-wave filter comprising:
- an electrode structure;
- at least one hardening-spring layer;
- and
- at least one softening-spring layer disposed between the electrode structure and the hardening-spring layer.
Dependencies are inferred from the claim text.