GVR Trade SA

Gorgier, Switzerland

GVR Trade SA

Gorgier, Switzerland
Time filter
Source Type

Plessky V.,GVR Trade SA | Methfessel M.,Ihp Microelectronics
IEEE International Ultrasonics Symposium, IUS | Year: 2016

Low-loss Surface Acoustic Wave (SAW) resonator-type filters, such as double mode SAW filters (or Coupled Resonator Filters, DMS/CRF), can be considered as transformers. Such a RF SAW 'transformer-filter' could operate directly on one of the ISM bands and be useful, for example, in 'wake-up' radios, since the RF voltage can be raised by passive means prior to rectification. Here, we propose to use a CRF-type of low-loss filter in combination with a few special techniques to increase the output impedance/voltage. The main idea is to separate the output transducers in sections and connect the sections in series. Several variants of this SAW transformer were designed, fabricated, and measured. We have used a so-called 'degenerated' CRF with three long IDTs, the output transducers being subdivided into series-connected sections. An estimated transformer coefficient of around 10 was achieved. © 2016 IEEE.

Agency: European Commission | Branch: FP7 | Program: CP-FP | Phase: NMP-2009-1.2-3 | Award Amount: 2.22M | Year: 2009

Surface Acoustic Wave (SAW) technology has been applied for more than 20 years to develop sensors exhibiting unique capabilities with limited ageing effects resulting in long term stability properties. During the 90s, they have proved their capability to be wirelessly operated without any on-board power supply. In parallel, the long term development of advanced material, particularly in Russia, has yielded a new class of material, namely Langasite and its variant forms, that can be substituted to quartz and lithium niobate particularly when operating at high temperature. Our project will demonstrate wireless SAW sensors operating in an unprecedented temperature range. This sets extreme challenges to all parts of the sensor system since the developed wireless system will be suitable to operate in harsh environments. The great progress brought by the project takes advantage of a consortium involving complementary major academics and industrial actors of SAW-sensor-based systems capable to successfully face the challenges of implementing a whole system allowing for physical metrology in harsh conditions. Substantial improvements will be provided for sensing physical parameters in a wide temperature range (-20C to \650C), in monitoring a nano-based production process and other applications. Significant knowledge will be generated in nano-sciences and nano-technologies linked to SAW physical sensors and materials for industrial applications. Demonstration of the system will be achieved at an industrial level for monitoring physical parameters under high pressures and high temperatures. The SAWHOT project consortium is set up on the basis of a bilateral Russian-European partnership generating a unique workforce cooperating within the FP7 framework to address this challenge. Finally, this project will bring on sustainable high-tech socio economic prospects : new markets and standards, improved cooperation between EU and Russian organizations.

Plessky V.P.,GVR Trade SA | Reindl L.M.,Albert Ludwigs University of Freiburg
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control | Year: 2010

SAW tags were invented more than 30 years ago, but only today are the conditions united for mass application of this technology. The devices in the 2.4-GHz ISM band can be routinely produced with optical lithography, high-resolution radar systems can be built up using highly sophisticated, but low-cost RF-chips, and the Internet is available for global access to the tag databases. The "Internet of Things," or I-o-T, will demand trillions of cheap tags and sensors. The SAW tags can overcome semiconductor-based analogs in many aspects: they can be read at a distance of a few meters with readers radiating power levels 2 to 3 orders lower, they are cheap, and they can operate in robust environments. Passive SAW tags are easily combined with sensors. Even the "anti-collision" problem (i.e., the simultaneous reading of many nearby tags) has adequate solutions for many practical applications. In this paper, we discuss the state-of-the-art in the development of SAW tags. The design approaches will be reviewed and optimal tag designs, as well as encoding methods, will be demonstrated. We discuss ways to reduce the size and cost of these devices. A few practical examples of tags using a timeposition coding with 106 different codes will be demonstrated. Phase-coded devices can additionally increase the number of codes at the expense of a reduction of reading distance. We also discuss new and exciting perspectives of using ultra wide band (UWB) technology for SAW-tag systems. The wide frequency band available for this standard provides a great opportunity for SAW tags to be radically reduced in size to about 1 × 1 mm2 while keeping a practically infinite number of possible different codes. Finally, the reader technology will be discussed, as well as detailed comparison made between SAW tags and IC-based semiconductor device. © 2006 IEEE.

Sveshnikov B.V.,Chernyshevsky Saratov State University | Suchkov S.G.,Chernyshevsky Saratov State University | Yankin S.S.,Chernyshevsky Saratov State University | Suchkov D.S.,Chernyshevsky Saratov State University | And 2 more authors.
IEEE International Ultrasonics Symposium, IUS | Year: 2013

An example of the in-line 6-GHz SAW tag design is presented. Supposing that Ultra-Wide-Band B=775MHz can be used the tag dimensions can be significantly reduced and the loss of reflected response remain at acceptable level of around -50dB. The usefulness of combinations of two different techniques of the SAW tag synthesis is demonstrated. The first one is based on the FEM/BEM software tools, providing the highly precise simulations, being yet a rather time-consuming procedure. The second approach is based of the fast semi-phenomenological routings, such as Discrete Analysis of Regular Systems (DARS) which demand so called local Coupling-of-Modes (COM) parameters as input data. The latter should be obtained in advance with the help of original algorithm using the Finite Element Analysis (FEA). It is shown that one can reasonably utilize the fast approximate modeling at the first stage of the SAW tag synthesis, being added by the precise FEM/BEM tools at the final stage of the real design in the face of mass production perspectives. © 2013 IEEE.

Yantchev V.,Uppsala University | Arapan L.,Uppsala University | Katardjiev I.,Uppsala University | Plessky V.,GVR Trade SA
Applied Physics Letters | Year: 2011

A concept for the development of thin film micro-acoustic resonators is demonstrated. The basic principles for the design and fabrication of zero-group-velocity Lamb acoustic wave resonators on c-textured thin aluminum nitride films are presented. The experimental results demonstrate that the zero-group-velocity waves can be employed in high frequency resonators with small form factors. © 2011 American Institute of Physics.

Yantchev V.,Uppsala University | Katardjiev I.,Uppsala University | Plessky V.,GVR Trade SA
IEEE International Ultrasonics Symposium, IUS | Year: 2011

Dispersion characteristics of surface acoustic waves (SAWs) propagating along the c-plane of single crystalline AlN under 2D tungsten (W) hexagonal gratings are studied using eigen-frequency and frequency response finite element analysis. Specifically, a 2D hexagonal grating with a 10μm distance between the W masses is considered and the frequency stopband SAW characteristics studied. For hexagonal W gratings with a thickness above a critical value (about 0.9μm in this case) SAW stopbands with a 0 rad and π/6 rad angle of incidence penetrate in each other thus forming a forbidden SAW frequency band lying between the upper stopband edge of the 0 rad incident SAW and the lower stopband edge of the π/6 rad incident SAW. In view of the above findings the existence of a complete frequency stopband is discussed. © 2011 IEEE.

Cerda-Villafana G.,University of Guanajuato | Ibarra-Manzano O.,University of Guanajuato | Shmaliy Y.S.,University of Guanajuato | Plessky V.,GVR Trade SA
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings | Year: 2012

We discuss the code reading error probability (EP) in the radio frequency identification (RFID) surface acoustic wave tags with pulse position coding and peak-pulse detection. EP is found in the most general form assuming M groups of codes with N slots each and allowing individual signal-to-noise ratios (SNRs) in each slot. We show that if the RFID tag is designed such that the spurious responses are attenuated on more than 20 dB below On-pulses, then EP can be achieved at the level of 10 -8 (one false per 10 8 readings) with SNR > 17 dB for any reasonable M and N. © 2012 IEEE.

Plessky V.,GVR Trade SA | Yantchev V.,Uppsala University
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control | Year: 2015

In a narrowband 2-port resonator on 37°cut quartz with Al electrodes (hAlu = 100 nm) exploiting surface transverse waves (STW), we have observed parasitic ripples which have been attributed to transverse modes unusually situated on the left side of the main resonance. To suppress these modes, we have used metallization coefficient weighting across the aperture, with more metal in the middle and reduced metallization close to the busbars. The parasitic modes indeed disappeared, but at significantly higher frequency, we have found an additional strong response which does not exist in a resonator with uniform electrode metallization. 3-D simulations showed that the structure has another very different mode, with the wave propagating mainly along the edge of the busbars, but excited with the interdigital electrode system. © 1986-2012 IEEE.

Plessky V.,GVR Trade SA | Shmaliy Y.S.,University of Guanajuato
Electronics Letters | Year: 2010

The code reading error probability is estimated in SAW tag systems employing peak-pulse detection with pulse position coding assuming M groups having N slots each. The error is found as a function of the signal-to-noise ratio, proving an extremely reliable deciphering of the tag code for SNR>20dB, meaning less than 1 false per billion of reading. © 2010 The Institution of Engineering and Technology.

News Article | November 8, 2016
Site: www.businesswire.com

GOLETA, Calif.--(BUSINESS WIRE)--Resonant Inc. (NASDAQ: RESN), a developer of software tools and intellectual property and design services provider of filters for radio frequency front-ends (RFFE) that specializes in delivering solutions for difficult bands and complex requirements, today announced that its wholly owned Swiss subsidiary, GVR Trade SA, executed a contract with EuroStars to fund a multi-year project for the development of sensors for new medical applications. The project is a thr

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