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    Filtenna integration achieving ideal chebyshev return losses  Open access

     Hueltes Escobar, Alberto; Verdu Tirado, Jorge Andres; Collado Gomez, Juan Carlos; Mateu Mateu, Jordi; Rocas Cantenys, Eduard; Valenzuela Gonzalez, Jose Luis
    Radioengineering
    Vol. 23, num. 1, p. 362-368
    Date of publication: 2014-04-01
    Journal article

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    This paper demonstrates that it is possible to find an ideal filter response (Chebyshev, Butterworth,..) considering the antenna as the last resonator of a filter under certain circumstances related with the antenna performance and the bandwidth of the filtenna device. If these circumstances are not accomplished, we can achieve excellent performance as well, by means of an iterative process the goal of which is defined by either a filter mask or a classical filter function itself. The methodology is based on the conventional coupling matrix technique for filter design and has been validated by fabricating a microstrip prototype using hairpin resonators and a rectangular patch antenna.

    This paper demonstrates that it is possible to find an ideal filter response (Chebyshev, Butterworth,..) considering the antenna as the last resonator of a filter under certain circumstances related with the antenna performance and the bandwidth of the filtenna device. If these circumstances are not accomplished, we can achieve excellent performance as well, by means of an iterative process the goal of which is defined by either a filter mask or a classical filter function itself. The methodology is based on the conventional coupling matrix technique for filter design and has been validated by fabricating a microstrip prototype using hairpin resonators and a rectangular patch antenna.

  • Electro-thermo-mechanical model for bulk acoustic wave resonators

     Rocas Cantenys, Eduard; Collado Gomez, Juan Carlos; Mateu Mateu, Jordi; Orloff, Nathan D.; Booth, James C.; Aigner, Robert
    IEEE transactions on Ultrasonics Ferroelectrics and Frequency control
    Vol. 60, num. 11, p. 2389-2403
    DOI: 10.1109/TUFFC.2013.6644742
    Date of publication: 2013-11
    Journal article

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    We present the electro-thermo-mechanical constitutive relations, expanded up to the third order, for a BAW resonator. The relations obtained are implemented into a circuit model, which is validated with extensive linear and nonlinear measurements. The mathematical analysis, along with the modeling, allows us to identify the dominant terms, which are the material temperature derivatives and two intrinsic nonlinear terms, and explain, for the first time, all observable effects in a BAW resonator by use of a unified physical description. Moreover, the terms that are responsible for the second-harmonic generation and the frequency shift with dc voltage are shown to be the same.

    We present the electro-thermo-mechanical constitutive relations, expanded up to the third order, for a BAW resonator. The relations obtained are implemented into a circuit model, which is validated with extensive linear and nonlinear measurements. The mathematical analysis, along with the modeling, allows us to identify the dominant terms, which are the material temperature derivatives and two intrinsic nonlinear terms, and explain, for the first time, all observable effects in a BAW resonator by use of a unified physical description. Moreover, the terms that are responsible for the second-harmonic generation and the frequency shift with dc voltage are shown to be the same.

  • Performance of BAW resonators at cryogenic temperatures

     Rocas Cantenys, Eduard; Collado Gomez, Juan Carlos; Mateu Mateu, Jordi; Hueltes Escobar, Alberto; Verdú Tirado, Jordi; Booth, James C.; Aigner, Robert
    IEEE International Ultrasonics Symposium
    p. 1672-1675
    DOI: 10.1109/ULTSYM.2013.0426
    Presentation's date: 2013-07
    Presentation of work at congresses

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    In this work we go beyond the usual temperature range for commercial applications and explore the functioning of Bulk Acoustic Wave (BAW) resonators down to cryogenic temperatures, to get the whole picture at understanding the physical tendency of the main parameters with temperature. This can ensure the proper functioning for specific applications where the device is exposed to extreme temperature variations.

  • Mechanical tuning of substrate integrated waveguide resonators

     Mira, Fermín; Mateu, Joan; Collado Gomez, Juan Carlos
    IEEE microwave and wireless components letters
    Vol. 22, num. 9, p. 447-449
    DOI: 10.1109/LMWC.2012.2208735
    Date of publication: 2012
    Journal article

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  • A thickness-shear MEMS resonator employing electromechanical transduction through a coplanar waveguide

     Johnson, W.L.; Wallis, T.M.; Kabos, P.; Rocas Cantenys, Eduard; Collado Gomez, Juan Carlos; Liew, L.A.; Ha, J.Y.; Davydov, A.V.; Plankis, A.; Heyliger, P.R.
    IEEE Frequency Control Symposium
    p. 452-457
    DOI: 10.1109/FCS.2012.6243722
    Presentation's date: 2012
    Presentation of work at congresses

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  • A consistent methodology to characterize BAW resonators

     Rocas Cantenys, Eduard; Collado Gomez, Juan Carlos; Aigner, Robert; Mateu Mateu, Jordi; Hueltes Escobar, Alberto; Booth, James C.
    IEEE International Ultrasonics Symposium
    p. 547-550
    DOI: 10.1109/ULTSYM.2012.0136
    Presentation's date: 2012-10
    Presentation of work at congresses

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    We present a methodology to characterize BAW resonators both linearly and nonlinearly. The procedure uses physical modeling along with measurements that exploit different manifestations of the nonlinear phenomena to identify the dominant linear and nonlinear material properties. Such methodology allows obtaining consistent nonlinear material parameters by use of two independents measurements.

    We present a methodology to characterize BAW resonators both linearly and nonlinearly. The procedure uses physical modeling along with measurements that exploit different manifestations of the nonlinear phenomena to identify the dominant linear and nonlinear material properties. Such methodology allows obtaining consistent nonlinear material parameters by use of two independents measurements.

  • An early stage training network in enabling technologies for GREEN radio

     Valenzuela Gonzalez, Jose Luis; Ruiz Boque, Silvia; Olmos Bonafé, Juan José; Kartsakli, Elli; Laya Romero, Andres Ernesto; Garcia Lozano, Mario; Collado Gomez, Juan Carlos; Alonso Zárate, Luis Gonzaga; Pérez Diaz de Cerio, David
    Competitive project

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  • An experimental study of multi-radio platform coexistence in the 5 GHz band for railway applications

     Higuera Portilla, Jorge Eduardo; Kartsakli, Elli; Collado Gomez, Juan Carlos; González Arbesú, José María; Alonso Zárate, Luis Gonzaga; Valenzuela Gonzalez, Jose Luis; Laya Romero, Andres Ernesto; Flores, Enrique; Navarro, Isabel; Martinez, R.; González, Jesús; Hierro, José; Vlad, Adrián
    International Workshop on Communication Technologies for Vehicles
    p. 11-22
    DOI: 10.1007/978-3-642-19786-4_2
    Presentation's date: 2011-03
    Presentation of work at congresses

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    This paper studies the practical challenges that arise due to the coexistence of two wireless technologies, both operating in the license-exempt 5 GHz band. In particular, WiFi and WiMAX equipment have been used in the experiments. The mutual interference caused by the two technologies operating in different but narrowly separated frequency channels has a negative impact on the performance of both systems. Further challenges are introduced when the two systems are in close physical proximity of each other or, in a more extreme scenario, share the same antenna as could be required in railway applications. This paper investigates these issues through a series of experimental tests based on a multi-radio platform testbed. The conclusions drawn from this study will be used as a base for the implementation of a multi-radio platform to provide communications between train and land in both directions in the context of the Spanish high-speed railway system.

  • Agile RF transceivers and front-ends for future smart multi-standar communications applications-upc

     Mateu Mateu, Jordi; Collado Gomez, Juan Carlos
    Competitive project

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    Sources of third¿order intermodulation distortion in bulk acoustic wave devices: a phenomenological approach  Open access

     Rocas Cantenys, Eduard; Collado Gomez, Juan Carlos
    Date of publication: 2011
    Book chapter

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    In this work, a model that uses several nonlinear parameters to predict harmonics and 3IMD distortion is presented. Its novelty lies in its ability to predict the nonlinear effects produced by self-heating in addition to those due to intrinsic nonlinearities in the material properties. The model can be considered an extension of the nonlinear KLM model (originally proposed by Krimholtz, Leedom and Matthaei) (Krimholtz et al., 1970) to include the thermal effects due to self-heating caused by viscous losses and electrode losses. For this purpose a thermal domain circuit model is implemented and coupled to the electro-acoustic model, which allows us to calculate the dynamic temperature variations that change the material properties. In comparison to (Rocas et al., 2009), this work describes the impact that electrode losses produce on the 3IMD, presents closed-form expressions derived from the circuit model and validates the model with extensive measurements that confirm the necessity to include dynamic self-heating to accurately predict the generation of spurious signals in BAW devices.

  • An experimental study of multi-radio platform coexistence in the 5 GHz band for railway applications

     Higuera Portilla, Jorge Eduardo; Kartsakli, Elli; Collado Gomez, Juan Carlos; González Arbesú, José María; Alonso Zárate, Luis Gonzaga; Valenzuela Gonzalez, Jose Luis; Laya Romero, Andres Ernesto; Flores, Enrique; Navarro, Isabel; Martínez, Raquel; González, Jesús; Hierro, José; Vlad, Adrián
    Date of publication: 2011-03
    Book chapter

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  • An Experimental Study of Multi-radio Platform Coexistence in the 5 GHz Band for Railway Applications

     Higuera Portilla, Jorge Eduardo; Kartsakli, Elli; Collado Gomez, Juan Carlos; González Arbesú, José María; Alonso Zárate, Luis Gonzaga; Valenzuela Gonzalez, Jose Luis; Laya Romero, Andres Ernesto; Flores, Enrique; Navarro, Isabel; Martínez, Raquel
    DOI: 10.1007/978-3-642-19786-4
    Date of publication: 2011
    Book chapter

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  • First-order elastic nonlinearities of bulk acoustic wave resonators

     Collado Gomez, Juan Carlos; Padilla Díaz, Alberto; Mateu Mateu, Jordi; O'callaghan Castella, Juan Manuel; Orloff, Nathan D.; Booth, James C.; Iborra, Enrique; Aigner, Robert; Rocas Cantenys, Eduard
    IEEE transactions on microwave theory and techniques
    Vol. 59, num. 5, p. 1206-1213
    DOI: 10.1109/TMTT.2010.2098042
    Date of publication: 2011-05
    Journal article

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  • On the relation between the nonlinear surface impedance and the superfluid current density in high-temperature superconductors

     Collado Gomez, Juan Carlos; Padilla Díaz, Alberto; Booth, James C.; Rocas Cantenys, Eduard
    IEEE transactions on applied superconductivity
    Vol. 21, num. 3, p. 555-558
    DOI: 10.1109/TASC.2010.2085030
    Date of publication: 2011-06
    Journal article

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    Passive intermodulation due to self-heating in printed transmission lines  Open access

     Collado Gomez, Juan Carlos; Orloff, Nathan D.; Mateu Mateu, Jordi; Padilla Díaz, Alberto; O'callaghan Castella, Juan Manuel; Booth, James C.; Rocas Cantenys, Eduard
    IEEE transactions on microwave theory and techniques
    Vol. 59, num. 2, p. 311-322
    DOI: 10.1109/TMTT.2010.2090356
    Date of publication: 2011
    Journal article

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  • Modeling of self-heating mechanism in the design of superconducting limiters

     Collado Gomez, Juan Carlos; Mateu Mateu, Jordi; Orloff, Nathan D.; Booth, James C.; Rocas Cantenys, Eduard
    IEEE transactions on applied superconductivity
    Vol. 21, num. 3, p. 547-550
    DOI: 10.1109/TASC.2010.2090449
    Date of publication: 2011-06
    Journal article

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  • Superconducting Multiplexer Filter Bank for a Frequency-Selective Power Limiter

     Padilla Díaz, Alberto; Mateu Mateu, Jordi; Orloff, Nathan D.; O'callaghan Castella, Juan Manuel; Collado Gomez, Juan Carlos; Booth, James C.; Rocas Cantenys, Eduard
    IEEE transactions on applied superconductivity
    Vol. 21, num. 3, p. 542-546
    DOI: 10.1109/TASC.2010.2093554
    Date of publication: 2011-06
    Journal article

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  • A Large-Signal Model of Ferroelectric Thin-Film Transmission Lines

     Rocas Cantenys, Eduard; Collado Gomez, Juan Carlos; Mateu Mateu, Jordi; Orloff, Nathan D.; O'callaghan Castella, Juan Manuel; Booth, James C.
    IEEE transactions on microwave theory and techniques
    Vol. 59, num. 12, p. 3059-3067
    DOI: 10.1109/TMTT.2011.2169420
    Date of publication: 2011-12
    Journal article

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  • NONLINEAR MECHANISMS IN PASSIVE MICROWAVE DEVICES  Open access  awarded activity

     Rocas Cantenys, Eduard
    Department of Signal Theory and Communications, Universitat Politècnica de Catalunya
    Theses

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    The telecommunications industry follows a tendency towards smaller devices, higher power and higher frequency, which imply an increase on the complexity of the electronics involved. Moreover, there is a need for extended capabilities like frequency tunable devices, ultra-low losses or high power handling, which make use of advanced materials for these purposes. In addition, increasingly demanding communication standards and regulations push the limits of the acceptable performance degrading indicators. This is the case of nonlinearities, whose effects, like increased Adjacent Channel Power Ratio (ACPR), harmonics, or intermodulation distortion among others, are being included in the performance requirements, as maximum tolerable levels. In this context, proper modeling of the devices at the design stage is of crucial importance in predicting not only the device performance but also the global system indicators and to make sure that the requirements are fulfilled. In accordance with that, this work proposes the necessary steps for circuit models implementation of different passive microwave devices, from the linear and nonlinear measurements to the simulations to validate them. Bulk acoustic wave resonators and transmission lines made of high temperature superconductors, ferroelectrics or regular metals and dielectrics are the subject of this work. Both phenomenological and physical approaches are considered and circuit models are proposed and compared with measurements. The nonlinear observables, being harmonics, intermodulation distortion, and saturation or detuning, are properly related to the material properties that originate them. The obtained models can be used in circuit simulators to predict the performance of these microwave devices under complex modulated signals, or even be used to predict their performance when integrated into more complex systems. A key step to achieve this goal is an accurate characterization of materials and devices, which is faced by making use of advanced measurement techniques. Therefore, considerations on special measurement setups are being made along this thesis.

  • Design and synthesis of a new class of receiver filters

     Mateu Mateu, Jordi; Collado Gomez, Juan Carlos; Padilla Díaz, Alberto; Rius Casals, Juan-manuel; O'callaghan Castella, Juan Manuel; Cuñado, O; Torra, J; Mingot, S; Ernst, Cristoph
    ESA Techno/Innovation Days
    p. 22-23
    Presentation's date: 2011-11-23
    Presentation of work at congresses

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  • Design of a high temperature superconductor suto-limiting multiplexer for interference mitigation

     Booth, James C.; Rocas Cantenys, Eduard; Padilla Díaz, Alberto; Collado Gomez, Juan Carlos; Mateu Mateu, Jordi; Berkowitz, Stuart
    European Conference on Applied Superconductivity
    p. 1
    Presentation's date: 2011-09-19
    Presentation of work at congresses

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  • Thermal and intrinsic nonlinearities of ferroelectric-based microwave devices

     Rocas Cantenys, Eduard; Collado Gomez, Juan Carlos; Mateu Mateu, Jordi; Booth, James C.
    International Symposium of Integrated Functionalities
    p. 150
    Presentation's date: 2011-08-03
    Presentation of work at congresses

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  • TECNOLOGIA Y NUEVAS TECNICAS DE DISEÑO PARA INTEGRACION EN CHIP DE CABECERAS DE MICROONDAS

     Mateu Mateu, Jordi; González Arbesú, José María; Ubeda Farre, Eduardo; Heldring, Alexander; Collado Gomez, Juan Carlos
    Competitive project

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  • Agile RF Transceivers and Front-Ends for future Smart Muli-Standard Communications Applications

     Collado Gomez, Juan Carlos; Mateu Mateu, Jordi
    Competitive project

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  • Connecteu-aerospace.cat

     Collado Gomez, Juan Carlos; Prats Menéndez, Xavier; Berenguer Sau, Jordi; de Villardi de Montlaur, Adeline; Mateu Mateu, Jordi
    Competitive project

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    Third-order intermodulation distortion due to self-heating in gold coplanar waveguides  Open access

     Collado Gomez, Juan Carlos; Orloff, Nathan D.; Booth, James C.; Rocas Cantenys, Eduard
    IEEE International Microwave Symposium
    p. 425-428
    Presentation's date: 2010-05
    Presentation of work at congresses

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    Synthesis of 4th order lossy filters with uniform Q distribution  Open access

     Mateu Mateu, Jordi; Padilla Díaz, Alberto; Collado Gomez, Juan Carlos; Martínez-Mendoza, Mónica; Ernst, Cristoph; O'callaghan Castella, Juan Manuel; Rocas Cantenys, Eduard
    IEEE International Microwave Symposium
    p. 568-571
    Presentation's date: 2010-05
    Presentation of work at congresses

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  • Application of lossy filter synthesis to a C-band cavity filter and its prospect for use in IMUX

     O'callaghan Castella, Juan Manuel; Padilla Díaz, Alberto; Mateu Mateu, Jordi; Rius Casals, Juan-manuel; Tamayo Palau, Jose Maria; Collado Gomez, Juan Carlos; Rocas Cantenys, Eduard
    Microwave Technology and Techniques Workshop
    Presentation's date: 2010-05-12
    Presentation of work at congresses

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  • Lossy filter synthesis of L-band planar filters using novel software

     Padilla Díaz, Alberto; Mateu Mateu, Jordi; Collado Gomez, Juan Carlos; Ernst, Cristoph; Rius Casals, Juan-manuel; Tamayo Palau, Jose Maria; O'callaghan Castella, Juan Manuel; Rocas Cantenys, Eduard
    Microwave Technology and Techniques Workshop
    p. 1
    Presentation's date: 2010-05-12
    Presentation of work at congresses

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    Lossy synthesis techniques are used to synthesize high performance filters using resonators with a finite Q. With these techniques a transmission response of a lossless filter with lowest possible roll-off is obtained, except for an overall constant additional insertion loss. The out-of band performance is not affected. These types of filters are useful in receiver architectures where the filter can be placed following an amplifying stage and some increase in insertion loss can be tolerated without affecting the noise figure. Due to the lower resonator Q that can be employed, low cost and compact filters (such as microstrip filters) can be realized. Hence this work presents the synthesis and design of two planar lossy filters. Both filters have been designed using microstrip technology, with center frequencies of 1 GHz and 1.6 GHz, and bandwidth of 36 MHz and 80 MHz, respectively. Both filters exhibit a flat in-band response with an insertion loss of 10 dB and 7.5 dB, respectively. The topologies obtained from the synthesis result in a 4th and a 6th order filters at 1 GHz and 1.6 GHz, respectively. Both topologies present a uniform Q distribution throughout the networks, this is all the resonators of the filter are equal to 200 and 290, respectively. In contrast with conventional filter networks, where all the couplings are reactive, lossy filters require some of the couplings to be resistive. The main difference between the two filters presented is the type of frequency response. While the filter at 1 GHz synthesizes a response with a stopband 10 dB return loss, the filter at 1.6 GHz synthesizes a purely reflective response in the stopband. The presentation will also show details of the software package that has been written to synthesize filters following various forms of pre-distortion, classical (no-loss considered in the synthesis) and lossy filter synthesis. This software obtains the coupling matrix of several network topologies for a given response and allows performing rotations on them to find the desired topology. Additionally, the software allows to evaluate the effect of loss in the networks resulting from the synthesis, even in those cases where the synthesis results in an ideal lossless network (i.e., classical and pre-distortion synthesis).

  • A Compact Variable-Temperature Broadband Series-Resistor Calibration

     Orloff, Nathan D.; Mateu Mateu, Jordi; Lewandowski, A.; King, Joshua P.; Gu, Dazhen; Lu, X.L.; Collado Gomez, Juan Carlos; Takeuchi, Ichiro; Booth, James C.; Rocas Cantenys, Eduard
    IEEE transactions on microwave theory and techniques
    Vol. 59, num. 1, p. 188-195
    DOI: 10.1109/TMTT.2010.2091200
    Date of publication: 2010-12-10
    Journal article

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  • Supercoducting multiplexer filter bank for a frequency selective power limiter

     Mateu Mateu, Jordi; Padilla Díaz, Alberto; O'callaghan Castella, Juan Manuel; Collado Gomez, Juan Carlos; Rocas Cantenys, Eduard
    Applied Superconductivity Conference
    Presentation's date: 2010-08
    Presentation of work at congresses

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    Comparison of lossy filters and predistorted filters using novel software  Open access

     Padilla Díaz, Alberto; Mateu Mateu, Jordi; Collado Gomez, Juan Carlos; Ernst, Cristoph; Rius Casals, Juan-manuel; Tamayo Palau, Jose Maria; O'callaghan Castella, Juan Manuel
    IEEE International Microwave Symposium
    p. 1720-1723
    Presentation's date: 2010-05
    Presentation of work at congresses

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  • Quantitative permittivity measurements of nanoliter fluid volumes from 50 MHz to 40 GHz with microfluidic channels

     Booth, James C.; Orloff, Nathan D.; Rocas Cantenys, Eduard; Mateu Mateu, Jordi; Collado Gomez, Juan Carlos; Lu, X.L.; Wang, Y.; Janezic, M.
    Conference on Precision Electromagnetic Measurements (CPEM)
    p. 353-354
    Presentation's date: 2010-06
    Presentation of work at congresses

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  • Description of self-heating mechanisms in high temperature superconductor microwave devices

     Collado Gomez, Juan Carlos; Rocas Cantenys, Eduard
    Applied Superconductivity Conference
    Presentation's date: 2010-08
    Presentation of work at congresses

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  • Relating the nonlinear surface impedance to the local nonlinear superfluid density in high temperature superconductors

     Collado Gomez, Juan Carlos; Padilla Díaz, Alberto
    Applied Superconductivity Conference
    Presentation's date: 2010-08
    Presentation of work at congresses

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  • MEDIDAS DE EFECTOS DE SINTONIZABILIDAD EN MATERIALES MULTIFERROICOS

     Collado Gomez, Juan Carlos; Mateu Mateu, Jordi; O'callaghan Castella, Juan Manuel
    Competitive project

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  • P26/08, Diseño y validación de una multiplataforma de comunicaciones inalámbricas para mejorar la seguridad en el AVE

     Valenzuela Gonzalez, Jose Luis; Alonso Zárate, Luis Gonzaga; Kartsakli, Elli; Collado Gomez, Juan Carlos
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  • Superconducting filters and passive components

     Collado Gomez, Juan Carlos; Mateu Mateu, Jordi; O'callaghan Castella, Juan Manuel; Mareu, J
    Date of publication: 2009-08-31
    Book chapter

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    Nonlinear distributed model for bulk acoustic wave resonators  Open access

     Collado Gomez, Juan Carlos; Mateu Mateu, Jordi; Padilla Díaz, Alberto; O'callaghan Castella, Juan Manuel; Rocas Cantenys, Eduard
    IEEE transactions on microwave theory and techniques
    Vol. 57, num. 12, p. 3019-3029
    DOI: 10.1109/TMTT.2009.2034211
    Date of publication: 2009-12
    Journal article

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    This work expands the model proposed by Krimtholz, Leedom, and Matthaei (KLM) model to account for the nonlinear effects occurring in acoustic devices due to the nonlinear stiffened elasticity.We show that a nonlinear distributed capacitance in the acoustic transmission line of the KLM model can account for the distributed nature of the nonlinear effects. Specifically, we use the nonlinear telegrapher’s equation to find closed-form equations for intermodulation distortion and harmonic generation. We confirm the validity of these equations by comparing their results with those provided by aKLMequivalent circuit in which the nonlinear transmission line is implemented by cascading many L-C cells having a voltage-dependent capacitance. To further confirm the model, we show measured nonlinear effects in a thin film bulk acoustic resonator in close agreement with the equivalent circuit simulations.

  • Third-order intermodulation distortion and harmonic generation in mismatched weakly nonlinear transmission lines

     Mateu Mateu, Jordi; Collado Gomez, Juan Carlos; Orloff, N; Booth, James C.; Rocas, E; O'callaghan Castella, Juan Manuel
    IEEE transactions on microwave theory and techniques
    Vol. 57, num. 1, p. 10-18
    Date of publication: 2009-01
    Journal article

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    Unified model for Bulk Acoustic Wave resonators¿ nonlinear effects  Open access

     Collado Gomez, Juan Carlos; Booth, James C.; Iborra, Enrique; Aigner, Robert; Rocas Cantenys, Eduard
    IEEE International Ultrasonics Symposium
    p. 880-884
    Presentation's date: 2009-09
    Presentation of work at congresses

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  • Dispositivo y filtro de onda acústica

     Collado Gomez, Juan Carlos; Mateu Mateu, Jordi; O'callaghan Castella, Juan Manuel; Padilla Díaz, Alberto; Rocas Cantenys, Eduard
    Date of request: 2009-07-08
    Invention patent

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    Dispositivo y filtro de onda acústica.

    El dispositivo comprende dos o más electrodos (1, 2), una capa activa piezoeléctrica (3) y unos medios de compensación de señales que comprenden como mínimo una capa compensatoria dieléctrica (4) configurada y ubicada para compensan señales espurias generadas, al aplicar una señal de entrada a dichos electrodos (1, 2), por unas no linealidades intrínsecas sustancialmente independientes de la temperatura, inherentes a las propiedades de elasticidad no lineales del material de al menos dicha capa activa (3).

    Para un ejemplo de realización los medios de compensación comprenden una fuente de tensión continua (Vdc) en conexión eléctrica con unas capas de alta conductividad (1, 2) entre las que se encuentra la capa compensatoria dieléctrica (4), para aplicar una tensión continua que varíe sus propiedades de elasticidad no lineales.

    El filtro comprende uno o más dispositivos como el propuesto por la invención.

  • People-218163-COOLNESS Coord

     Alonso Zárate, Luis Gonzaga; Kartsakli, Elli; Laya Romero, Andres Ernesto; Collado Gomez, Juan Carlos
    Competitive project

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  • Provision of optimum radio access at the emerging Next Generation Networks (PASSENGER: FP7-PIEF-GA-2008-219561)

     Collado Gomez, Juan Carlos; Alonso Zárate, Luis Gonzaga
    Competitive project

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  • Nonlinear distributed model for IMD prediction in BAW resonators

     Rocas, E; Collado Gomez, Juan Carlos; Padilla, A; Mateu Mateu, Jordi; O'callaghan Castella, Juan Manuel
    2008 IEEE International Ultrasonics Symposium
    p. 1557-1560
    Presentation of work at congresses

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  • Third order Intermodulation distortion in film bulk acoustic resonator at resonance and antiresonance

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    Presentation of work at congresses

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  • La prueba piloto de adaptación al eees en la escuela politécnica superior de castelldefels

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    Jornada Nacional sobre estudios universitarios
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    Presentation of work at congresses

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  • A Cavity measurement setup for determining IMD properties of top and bottom sides of HTS films

     Diaz, R; Mateu Mateu, Jordi; Collado Gomez, Juan Carlos; O'callaghan Castella, Juan Manuel
    2008 IEEE Applied Superconductivity Conference
    p. 66
    Presentation of work at congresses

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