M. Mattes

École Polytechnique Fédérale de Lausanne, Lausanne, Vaud, Switzerland

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Publications (84)30.48 Total impact

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    ABSTRACT: Prof. Julien Perruisseau-Carrier passed away on June 6, 2014, at the age of 34. Of Swiss and French nationalities, Julien was born in Lausanne, Switzerland, on October 30, 1979. In 1998, he started his university studies at the Ecole Polytechnique F¿¿d¿¿rale de Lausanne (EPFL), Switzerland, from where he got his Electrical Engineering MSc in 2003. The colleagues, mentors, and teachers who knew Julien during his undergraduate studies quickly recognized in him a very clever mind, combining outstanding human, scientific, and leadership qualities.
    IEEE Antennas and Propagation Magazine 01/2014; 56(3):122-123. · 1.18 Impact Factor
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    ABSTRACT: Cosmic microwave background (CMB) studies require observations in several frequency bands simultaneously. For example, the detection of clusters of remote galaxies can be performed by comparing CMB photon fluxes at different frequencies, using the spectral deformation of the Planck law, due to the Sunyaev-Zeldovich effect. We propose a single pixel design to receive and detect simultaneously two frequency bands of the (CMB), centered at 150 and 220 GHz. It is composed of a bow-tie antenna, sensitive to the polarization of the incident radiation, feeding a diplexer structure to separate the signal towards two kinetic inductance resonators associated respectively with the 130-170 and 200-270 GHz frequency bands. The diplexer makes use of 150 nm thick niobium-based superconducting transmission lines of the coplanar strip-lines (CPS) type, for filtering and separation purposes, deposited on a 30 μm thick quartz substrate. A new coplanar matching structure, taking into account the kinetic inductance of the superconducting films, is proposed and achieves a nearly perfect match over more than 25% of each frequency band, along with a signal separation ratio above 30 dB at both center frequencies. The size of a single pixel is 0.9 mm × 1.2 mm.
    Superconductor Science and Technology 01/2014; 27(1):5011-. · 2.76 Impact Factor
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    ABSTRACT: This paper analyzes the microwave gas discharge within elliptical waveguides excited by the fundamental mode. The Rayleigh-Ritz method has been applied to solve the continuity equation. The eigenvalue problem defined by the breakdown condition has been solved and the effective diffusion length of the elliptical waveguide has been calculated, what is used to find the corona threshold. This paper extends the microwave breakdown model developed for circular waveguides and shows the better corona withstanding capabilities of elliptical waveguides. The corona breakdown electric field threshold obtained with the variational method has been compared with the one calculated with the Finite Elements Method, showing excellent agreement.
    12/2013; 21(1).
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    ABSTRACT: Starting from the separate codes BI-RME and ECLOUD or PyECLOUD, we are developing a novel joint simulation tool, which models the combined effect of a charged particle beam and of microwaves on an electron cloud. Possible applications include the degradation of microwave transmission in tele-communication satellites by electron clouds; the microwave-transmission tecchniques being used in particle accelerators for the purpose of electroncloud diagnostics; the microwave emission by the electron cloud itself in the presence of a magnetic field; and the possible suppression of electron-cloud formation in an accelerator by injecting microwaves of suitable amplitude and frequency. A few early simulation results are presented.
    10/2013;
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    Edén Sorolla, Juan Ramón Mosig, Michael Mattes
  • Edén Sorolla, Juan Ramón Mosig, Michael Mattes
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    ABSTRACT: This paper describes a fast algorithm to calculate a large number of roots of the cross-product of Bessel functions and of their first derivatives. The method uses the Newton–Raphson algorithm following a pyramidal scheme using the interlacing property of the cross-product of Bessel functions. The algorithm shows globally convergent behavior for a large range of values of the argument and of the order of the Bessel functions. The roots can be computed to any precision, limited only by the computer implementation, and the convergence is attained in six iterations per root in average, showing a much better performance than previous works for the calculation of these roots.
    IEEE Transactions on Antennas and Propagation 04/2013; 61(4):2180. · 2.33 Impact Factor
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    Dataset: Corona2010
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    ABSTRACT: This paper demonstrates how an already developed finite element code for solving electromagnetic problems can be manipulated and simply extended so as to investigate complicated corona breakdowns. A safe criterion based on the eigenvalue analysis is used in order to predict the maximum electric field that a structure can withstand without suffering from a corona breakdown. Comparison with other semi-analytical techniques developed by researchers solely focusing on high power phenomena verifies the results of the developed algorithm.
    Antennas and Propagation (EuCAP), 2013 7th European Conference on; 01/2013
  • A.L. Sounas, J.R. Mosig, M. Mattes
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    ABSTRACT: This paper studies the effect of digitally modulated signals on the evolution of the multi-paction phenomenon. Multipactor is numerically analyzed in a parallel plates waveguide for a variety of common digital modulation techniques. Breakdown power thresholds and the temporal evolution of the particle population are computed. Results demonstrate that the phenomenon may be remarkably affected depending on the applied modulation scheme.
    Antennas and Propagation (EuCAP), 2013 7th European Conference on; 01/2013
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    E Sorolla, M Mattes
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    ABSTRACT: The saturation stage of a multipactor discharge is considered of interest, since it can guide towards a criterion to assess the multipactor onset. The electron cloud under multipactor regime within a parallel-plate waveguide is modeled by a thin continuous distribution of charge and the equations of motion are calculated taking into account the space charge effects. The saturation is identified by the interaction of the electron cloud with its image charge. The stability of the electron population growth is analyzed and two mechanisms of saturation to explain the steady-state multipactor for voltages near above the threshold onset are identified. The impact energy in the collision against the metal plates decreases during the electron population growth due to the attraction of the electron sheet on the image through the initial plate. When this growth remains stable till the impact energy reaches the first cross-over point, the electron surface density tends to a constant value. When the stability is broken before reaching the first cross-over point the surface charge density oscillates chaotically bounded within a certain range. In this case, an expression to calculate the maximum electron surface charge density is found whose predictions agree with the simulations when the voltage is not too high.
    Physics of Plasmas 07/2012; 19:072304. · 2.38 Impact Factor
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    ABSTRACT: Highly accurate and efficient cubatures based on the double exponential quadrature rules are presented for the computation of weakly singular integrals arising in Galerkin mixed potential integral equation formulations. Due to their unique ability to handle non-smooth kernels, the proposed integration schemes can safely replace (in a “plug-n-play” sense) the traditional Gauss-Legendre rules in the existing singularity cancellation and singularity subtraction methods. Numerical examples using RWG basis functions confirm the excellent performance of the proposed method.
    IEEE Transactions on Antennas and Propagation 01/2012; 60(5):2579-2582. · 2.33 Impact Factor
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    ABSTRACT: This paper deals with the interaction of electron clouds with microwaves inside beam-pipes like the one of the LHC in CERN. The details of the model and recent results are presented during the conference.
    Electromagnetics in Advanced Applications (ICEAA), 2012 International Conference on; 01/2012
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    ABSTRACT: This paper extends previous Corona breakdown predictions for different ionization models in closed structures to open ones such as monopole antennas, as they are frequently encountered in air- and spacecrafts, prone to suffer from this kind of discharge.
    Antennas and Propagation (EUCAP), 2012 6th European Conference on; 01/2012
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    ABSTRACT: A new prediction algorithm for multipactor breakdown determination in multicarrier signals is presented. This new algorithm assumes a quasi-stationary (QS) model based on the nonstationary theory for single-carrier signals. It determines the worst case, i.e., the combination of signal phases that yields the lowest breakdown level per carrier, using multipactor electron growth models. It considers the secondary emission yield properties of the material and the time-varying value of the multicarrier signal envelope.
    IEEE Transactions on Microwave Theory and Techniques 01/2012; 60(7):2093-2105. · 2.23 Impact Factor
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    ABSTRACT: A new integration scheme, specifically tailored for the first, finite, part of Sommerfeld Integrals (SIs) arising in the electromagnetic analysis of multilayered structures, is presented. It appropriately handles the branch point singularities appearing in SIs utilizing double exponential quadrature rules and allows an efficient integration on the real axis without any need for deformed integration paths. Additionally, an error estimator is provided, guaranteeing the accuracy of the computations within predefined requirements. Finally, numerical results are presented validating both the improved performance of the proposed technique and the proper behavior of the error estimator.
    Antennas and Propagation (EUCAP), 2012 6th European Conference on; 01/2012
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    ABSTRACT: In this letter, a method for the improved consideration of propagation losses in metallic waveguide structures is presented. The method relies on the perturbation of the boundary conditions on the metallic walls of the waveguides. Following this advanced technique, we are able to compute a complex modal propagation constant, thus avoiding the drawbacks of the classical power-loss method where losses associated to evanescent modes were not taken into account. A Computer Aided Design (CAD) software package based on such a modal analysis tool has been applied to predict the propagation loss effects in a Ka-Band rectangular waveguide filter.
    IEEE Microwave and Wireless Components Letters 12/2011; · 1.78 Impact Factor
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    ABSTRACT: In this paper, propagation losses effects present in rectangular waveguide structures are rigorously considered. For this purpose, a new formulation based on the perturbation of the boundary conditions on the metallic walls of the waveguides combined with an Integral-Equation (IE) analysis technique is proposed. Following this advanced technique, the drawbacks of the classical power-loss method are overcome and a complex modal propagation constant is computed. To validate this theory, we have successfully compared our results with numerical data of lossy hollow waveguides. Next, a Computed-Aided-Design (CAD) software package based on such a novel modal analysis tool has been used to predict the propagation losses effects in a 2-pole symmetric bandpass filter.
    Microwave Workshop Series on Millimeter Wave Integration Technologies (IMWS), 2011 IEEE MTT-S International; 10/2011
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    ABSTRACT: This study gives a full treatment of the network characterisation of multi-port planar circuits embedded in shielded stratified media with an integrated approach to lumped ports and wave ports. The details of the mathematical formulation for the retrieval of scattering parameters are given in three cases: networks possessing only lumped ports, networks possessing only wave ports and networks with a combination of both types. A detailed description of the computer algorithm is presented to help the reader easily reproduce our results. The implementation of combined ports in the framework of planar multi-layered structures is particularly useful in analysing systems that have waveguide connections and planar circuitries in their structure, such as cavity-backed antennas and their associated feeding systems, dielectric resonator antennas or compound microwave filters. In such structures one can divide the system into the waveguide structure and the planar circuitries and analyse each part separately with an appropriate and efficient numerical technique. Network characterisations will be consequently communicated at the port interfaces. This strategy enhances the total performance of the computational scheme to a great extent, while not affecting the accuracy of the full-wave analysis.
    IET Microwaves Antennas & Propagation 07/2011; · 0.84 Impact Factor
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    ABSTRACT: This study reviews the coupling matrix synthesis of dissipative microwave filters. It compares it to the synthesis of lossless transfer functions and shows that by correctly interpreting the mathematical operations in the lossless case, that is especially the matrix product of vectors and matrices, the same procedure can be adopted for the case including losses. Beyond this, necessary and sufficient conditions are provided guaranteeing that a proper coupling matrix, that is which is symmetric, is obtained at the end. Two examples show the application of the procedure and demonstrate that the correct filter transfer functions are indeed obtained.
    IET Microwaves Antennas & Propagation 07/2011; · 0.84 Impact Factor
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    ABSTRACT: The Double Exponential (DE) quadrature rule is modified in order to efficiently integrate the observation domain of the 4-D weakly singular integrals arising in Mixed Potential Integral Equation (MPIE) formulations. Although, the original DE rule already guarantees numerically exact results, it results in poor convergence when compared to widely used interpolatory quadratures like Gauss Legendre (GL), in the cases in which only a few sampling points are considered. The proposed modification, based on the parametrization of the DE transformation, overcomes this weakness: it achieves higher accuracy for a small number of sampling points without additional computational effort while for a large number of evaluation points the behavior of the original DE is recovered. Furthermore, the universality of the proposed technique is outlined, demonstrating that it is satisfactorily applicable to a vast variety of source and observation domains with different geometrical characteristics.
    Antennas and Propagation (EUCAP), Proceedings of the 5th European Conference on; 05/2011

Publication Stats

76 Citations
30.48 Total Impact Points

Institutions

  • 2000–2012
    • École Polytechnique Fédérale de Lausanne
      • Electromagnetics and Acoustics Laboratory
      Lausanne, Vaud, Switzerland
  • 2010
    • playence Spain S.L.
      Madrid, Madrid, Spain
  • 2006
    • Polytechnical University of Valencia
      • Department of Communications
      Valencia, Valencia, Spain
  • 2005
    • Technical University Darmstadt
      Darmstadt, Hesse, Germany
  • 2001
    • Schiller AG
      Бар, Zug, Switzerland