Universitat Politècnica de Catalunya - UPC

Novel acoustic wave device and filter for its use in high frequency applications

Posted by Universitat Politècnica de Catalunya - UPCResponsive · Patents for licensing · Spain

Summary of the technology

An acoustic wave device with one or more dielectric compensating layers that compensates the spurious signals by substantially temperature-independent nonlinearities occurring within the device has been developed. A direct application of this device has been the development of a novel acoustic filter. Partners to further develop the system and/or to establish commercial agreements with technical cooperation are sought.

Universitat Politècnica de Catalunya - UPC
Universitat Politècnica de Catalunya - UPC

The Challenge

Acoustic filter technologies based on piezoelectric materials play a key role in wireless communication because they guarantee spectral integrity of Radio Frequency (RF) signals.

SAW and BAW filters are commonly used in the mobile phone market and new technologies and materials are constantly needed to achieve important improvements in wireless products. On of the problems of these technologies (SAW and BAW) are the nonlinearities that are inherent of the materials used in the resonators devices. The properties of the materials used depend of the electrical or acoustic magnitudes present.

The elasticity of the piezoelectric material and the self-heating effects are the principal causes of the acoustic devices nonlinearities.

The conventional temperature compensation techniques (the compensating layer has a temperature coefficient opposite to the piezoelectric layer), intended to compensate frequency detuning; also contribute to a certain compensation of the extrinsic temperature– induced nonlinearities.

The Technology

In contrast, this offer proposes an acoustic device made of one or more dielectric compensating layers to compensate the spurious signals generated, by intrinsic substantially temperature-independent nonlinearities, when applying an input signal at he electrodes.

Theses nonlinearities are intrinsic to the nonlinear elastic properties of the materials used to fabricate the acoustic device.
This technology comprises an acoustic device formed by two or more electrodes, one or more active layers made of piezoelectric material and compensation layers to counteract the spurious signals generated by nonlinearities occurring within the acoustic device.

Current stage of development

The technology is a proof of concept available for testing

Applications and Target Market

The main application is in the field of microwave filters. More specifically, the offer proposed a solution to cancel and/or mitigate the spurious signals produced in BAW or SAW filters. Other applications are in any field where propagation through nonlinear-media is being used, such as power acoustic transducers, mechanic sensors, lab-on-a-chip transducers”, etc.

Innovative advantages

·  A novel way to cancel and/or mitígate nonnlinearities in acoustic devices by a means of a compensating layer.

·  A solution based on mere physics phenomena, in contrast to the device built in solutions currently in use, like the anti-parallel connection.

Intellectual property status

Granted Patent
Technology available for licensing with technical cooperation s Patent Status PCT application filed

Technology Owner

Universitat Politècnica de Catalunya - UPC

Technology Transfer Office

Related keywords

  • Electronics, IT and Telecomms
  • Vibration and Acoustic engineering
  • Measurements and Standards
  • Acoustic Technology related to measurements
  • Physical Sciences and Exact Sciences
  • High Frequency Technology, Microwaves
  • Amplifier, A/D Transducer
  • Sensors & Wireless products
  • Sensor Technology related to measurements
  • Satellite Microwave Communications
  • Microwave service facilities
  • Microwave and satellite components (including antennae and amplifiers)
  • acoustic wave device

About Universitat Politècnica de Catalunya - UPC

Technology Transfer Office from Spain

The Universitat Politècnica de Catalunya - BarcelonaTech is a public institution dedicated to higher education and research in the fields of engineering, architecture and science, which contributes its knowledge and expertise in order to increase scientific output, transfer its results to society and provide a network of scientific and technical state-of-the-art facilities and technology valorization services that place us at the leading edge of innovation and economic development.

The UPC has established itself as a driver of innovation and is the technology partner of choice for companies and organizations with which it develops projects and builds partnerships. A role borne out by the numerous agreements and research projects that have been set in motion by groups, organizations and laboratories; the creation of new technology-based companies; the generation and exploitation of patents, and the scientific and technical services UPC makes available to its environment in order to generate progress and employment.

The Technology Transfer Office (SGI) is responsible of Designing, coordinating and implementing research valorisation strategies, carrying out the protection policy of the research results, marketing these results through license contracts and designing and setting up the University's enterprise creation model in order to transfer the results of the research to the market, protect and commercialize these results, promote the culture of entrepreneurship and innovation, and create technology-based companies within the UPC environment.

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