Title: Attenuation of spurious responses in electromechanical filters

Abstract

A spur cancelling, electromechanical filter includes a first resonator having a first resonant frequency and one or more first spurious responses, and it also includes, electrically connected to the first resonator, a second resonator having a second resonant frequency and one or more second spurious responses. The first and second resonant frequencies are approximately identical, but the first resonator is physically non-identical to the second resonator. The difference between the resonators makes the respective spurious responses different. This allows for filters constructed from a cascade of these resonators to exhibit reduced spurious responses.

Inventors:

Olsson, Roy H.; Hietala, Vincent M.

Issue Date:

Tue Apr 10 00:00:00 EDT 2018

Research Org.:

Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)

Sponsoring Org.:

USDOE

OSTI Identifier:

1433842

Patent Number(s):

9941857

Application Number:

15/072,611

Assignee:

National Technology & Engineering Solutions of Sandia, LLC (Albuquerque, NM)

Patent Classifications (CPCs):

H - ELECTRICITY H03 - BASIC ELECTRONIC CIRCUITRY H03H - IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS

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H - ELECTRICITY H03 - BASIC ELECTRONIC CIRCUITRY H03H - IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS

H03H9/02228 - {Guided bulk acoustic wave devices or Lamb wave devices having interdigital transducers situated in parallel planes on either side of a piezoelectric layer}
H03H9/02433 - {Means for compensation or elimination of undesired effects}
H03H9/462 - {Microelectro-mechanical filters}
H03H9/54 - comprising resonators of piezo-electric or electrostrictive material
H03H9/64 - using surface acoustic waves

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DOE Contract Number:  

AC04-94AL85000

Resource Type:

Patent

Resource Relation:

Patent File Date: 2016 Mar 17

Country of Publication:

United States

Language:

English

Subject:

42 ENGINEERING