Electro acoustic rf filter with impedance element having improved performance and multiplexer component comprising the filter
AssigneeRF360 Singapore Pte. Ltd.
InventorsAnsgar SCHAEUFELE, Thomas BAUER, Gholamreza DADGAR JAVID
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Abstract
An improved electro acoustic RF filter (FC) is provided . The RF filter comprises an electro acoustic resonator (EAR) connected between an input port and an output port, an impedance element and a damping and/or dissipation element (DE) in mechanical contact to the impedance element. The damping and/or dissipation element is provided and configured to remove acoustic energy from the impedance element which has a similar construction as the resonator on the same substrate. With such a construction an acoustically inactive impedance element (AIIE) is obtained.
Claims21
1-10. (canceled)
An electro acoustic RF filter, comprising:
- an input port and an output port;
- an electro acoustic resonator electrically connected between the input port and the output port;
- an acoustically inactive impedance element electrically coupled to the electro acoustic resonator, wherein the acoustically inactive impedance element comprises at least one of an interdigitated electrode structure or a structure comprising two electrodes separated by a dielectric layer between the two electrodes;
- and
- a damping element connected to the acoustically inactive impedance element.
An electro acoustic RF filter, comprising:
- an input port and an output port;
- an electro acoustic resonator electrically connected between the input port and the output port;
- an acoustically inactive impedance element electrically coupled to the electro acoustic resonator;
- and
- a damping element connected to the acoustically inactive impedance element, wherein the electro acoustic resonator has a first layer construction and the acoustically inactive impedance element has a second layer construction, and wherein the first layer construction and the second layer construction differ in at least one parameter selected from at least one of a number of layers, a thickness of a layer, a material of a layer and a viscosity of a layer.
An electro acoustic RF filter, comprising:
- an input port and an output port;
- an electro acoustic resonator electrically connected between the input port and the output port;
- an acoustically inactive impedance element electrically coupled to the electro acoustic resonator;
- and
- a damping element connected to the acoustically inactive impedance element, wherein the damping element is formed at least in part from a housing of the electro acoustic resonator.
Dependencies are inferred from the claim text.