M. Mattes

École Polytechnique Fédérale de Lausanne, Lausanne, Vaud, Switzerland

Are you M. Mattes?

Claim your profile

Publications (99)40.39 Total impact

  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Abstract—In this work, ohmic losses present in arbitrarily shaped waveguide-based structures are rigorously considered. For such purpose, a software tool 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. In order to obtain the modal chart of waveguides with arbitrary cross-section, the Boundary Integral - Resonant Mode Expansion (BI-RME) method is also employed. To show the advantages of the proposed technique a computer-aided design software package based on this modal analysis tool has been applied to predict the propagation loss effects in complex waveguide components.
    Full-text · Conference Paper · May 2015
  • Eden Sorolla · Apostolos Sounas · Michael Mattes
    [Show abstract] [Hide abstract]
    ABSTRACT: Multipactor is a hazardous vacuum discharge produced by secondary electron emission within microwave devices of particle accelerators and telecommunication satellites. This work analyzes the dynamics of the multipactor discharge within a coaxial line for the mono-energetic electron emission model taking into account the space charge effects. The steady-state is predicted by the proposed model and an analytical expression for the maximum number of electrons released by the discharge presented. This could help to link simulations to experiments and define a multipactor onset criterion.
    No preview · Article · Mar 2015 · Physics of Plasmas
  • Source

    Full-text · Dataset · Jan 2015
  • Ioannis D. Koufogiannis · Michael Mattes · Juan R. Mosig
    [Show abstract] [Hide abstract]
    ABSTRACT: This work focuses on Green's functions (GFs) of planar multilayered structures that may include an arbitrary number of conductive sheets. The spectral-domain GFs are derived through an automatized strategy based on the propagator matrix technique, while the spatial-domain counterparts are evaluated using a novel, efficient, and error controlled numerical method. All of the procedures remain general in order to accommodate for the tensorial nature of the surface conductivity of the sheets. Numerical examples of GFs for the mixed potential integral equation method are provided, validating the proposed algorithms.
    No preview · Article · Jan 2015 · IEEE Transactions on Microwave Theory and Techniques
  • [Show abstract] [Hide abstract]
    ABSTRACT: This paper proposes an efficient modeling technique for transient electromagnetic analysis of a rectangular metallic enclosure with multiple apertures, using the surface equivalent principle (SEP) and integral equations. The SEP is used to replace the apertures by perfect electric conductor surfaces while introducing appropriate magnetic current densities on both sides of the apertures. As a result, the problem is reduced to two independent regions. The first region is outside the enclosure for which the free-space Green's function with the aid of image theory can be used to obtain the total fields in it. The second region is the inside of the enclosure and a closed-form expression is then derived for its time-domain dyadic Green's function. Finally, the governing time-domain magnetic field integral equation (TD-MFIE) for the structure is derived by enforcing the continuity of the tangential magnetic field at the apertures. To eliminate the late time instabilities in solving the resultant TD-MFIE, an unconditionally stable marching-on-in degree scheme is used. A new accelerated algorithm is proposed for the internal problem that relies on the separation of time and space in the cavity Green's function. The validity of the proposed method is confirmed by comparing the simulation results of several case studies with those obtained using the frequency-domain methods and CST microwave studio.
    No preview · Article · Dec 2014 · IEEE Transactions on Electromagnetic Compatibility
  • Marc Esquius-Morote · Michael Mattes · Juan R. Mosig
    [Show abstract] [Hide abstract]
    ABSTRACT: A dual-polarized system fully implemented in substrate integrated technology is presented. It comprises an orthomode transducer (OMT) with planar excitation schemes for both orthogonal ${rm TE}_{10}$- and ${rm TE}_{01}$-modes and a dual-polarized horn antenna. The whole structure requires only two layers of substrate, and it is based on the extended substrate integrated waveguide (ESIW), which allows the propagation of ${rm TE}_{m0}$- and ${rm TE}_{0n}$ -modes. A compact OMT design is proposed along with a procedure to optimize it. The matching and radiation characteristics of a dual-polarized horn antenna fed with this OMT are also studied. The complete structure was manufactured exhibiting an 8.6% bandwidth $({hbox{13.9–15.15 GHz}})$ where both modes are well matched $(<-{hbox{10 dB}})$ and isolated $(>{hbox{28 dB}})$. The horn radiation patterns within the frequency range of operation are also similar for both polarizations. The proposed design demonstrates the feasibility of dual-polarized substrate integrated circuits (SICs). This opens the door to new substrate integrated devices as well as to the use of SICs in applications requiring polarization diversity at end-fire. All together, this combined design becomes a promising approach to tackle the increasing demand for capacity in modern communication systems.
    No preview · Article · Oct 2014 · IEEE Transactions on Antennas and Propagation
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: The accurate consideration of propagation losses in arbitrarily shaped waveguide-based structures is studied in this paper. For such a purpose, a software tool based on the perturbation of the boundary conditions on the waveguide metallic walls and on the boundary integral - resonant mode expansion method has been developed. To show the advantages of the proposed technique with respect to the classic power-loss method, the complex propagation wavenumbers of a double ridge and an elliptical waveguide have been first computed and compared with results of a commercial software based on the finite element technique. Next a circular, a sectorial shaped and a triangular shaped waveguide have been considered. Then, a computer-aided design software package based on this modal analysis tool has been applied to predict the propagation loss effects in complex waveguide structures, such as an evanescent mode ridge waveguide filter, a traditional dual mode filter with circular cavities and a twist component for K-band applications.
    Full-text · Article · Sep 2014 · IET Microwaves Antennas & Propagation
  • Source
    Juan R. Mosig · Marta Martinez-Vazquez · Michael Mattes
    [Show abstract] [Hide abstract]
    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.
    Full-text · Article · Jun 2014 · IEEE Antennas and Propagation Magazine
  • [Show abstract] [Hide abstract]
    ABSTRACT: This work analyzes the 20-gap crossing rule from a theoretical point of view. It has been found that, depending on some signal parameters, the 20-gap-crossing rule yields predictions laying between two limit cases: It may be either excessively conservative or closer to breakdown value with little (or nonexistent) margin. Such limit cases have been experimentally assessed with two test campaigns in C and Ku-bands.
    No preview · Article · Apr 2014
  • Marc Esquius-Morote · Michael Mattes · Juan R. Mosig
    [Show abstract] [Hide abstract]
    ABSTRACT: A complete dual polarized substrate integrated structure is presented. It comprises planar excitation schemes for both orthogonal TE10 and TE01 modes along with an orthomode transducer (OMT) to combine/split them. The whole structure is compact (only 2 layers of substrate) and it is based on the Extended Substrate Integrated Waveguide (ESIW), which allows the propagation of TEm0 and TE0n modes. Differently from common approaches, not only the OMT itself but the complete system can be manufactured using standard PCB technology and is compatible with other substrate integrated circuits. The proposed orthogonal mode combination can be used to obtain independent channels of information from a single substrate integrated antenna, such as a dual polarized horn or a multimode leaky-wave antenna. This is a promising approach to tackle the increasing demand for capacity in modern communication systems when combined with, for instance, polarization or spatial diversity techniques.
    No preview · Conference Paper · Apr 2014
  • Apostolos L. Sounas · Eden Sorolla · Michael Mattes
    [Show abstract] [Hide abstract]
    ABSTRACT: This paper studies the evolution of the multipactor discharge inside a parallel-plate waveguide partially loaded by a dielectric slab. The effect of static charges on the dielectric surface as well as of induced charges on the metallic plates are included. Results demonstrate that breakdown can be self-extinguishing, however, after passing through a saturation state.
    No preview · Conference Paper · Apr 2014
  • Ioannis D. Koufogiannis · Michael Mattes · Juan R. Mosig
    [Show abstract] [Hide abstract]
    ABSTRACT: A complete and automatized strategy has been developed to derive the Vector and Scalar Potential Green Functions (GFs) of planar multilayered structures that include conductive sheets. The propagator matrix technique is enhanced to include conductive sheets and the connection to the Mixed Potential GFs through the normal components of the Field GFs is developed. Finally, an example including a graphene sheet validates the proposed procedure through a comparison with results in the literature.
    No preview · Conference Paper · Apr 2014
  • M. Madi · M. Mattes · J. R. Mosig · D. Rauly · P. Febvre
    [Show abstract] [Hide abstract]
    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.
    No preview · Article · Jan 2014 · Superconductor Science and Technology
  • I. D. Koufogiannis · E. Sorolla · M. Mattes
    [Show abstract] [Hide abstract]
    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.
    No preview · Article · Dec 2013 · Physics of Plasmas
  • M. Mattes · E. Sorolla · F. Zimmermann
    [Show abstract] [Hide abstract]
    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.
    No preview · Article · Oct 2013
  • [Show abstract] [Hide abstract]
    ABSTRACT: The development of Green's Functions (GF) for structures including graphene layers is a keypoint for the design and analysis of future graphene-based antenna components. Their properties and computational challenges are presented and discussed within this contribution. Additionally, a novel computational technique that offers high evaluation speed and good accuracy for calculating such GFs is proposed and compared to reference methods.
    No preview · Conference Paper · Jul 2013
  • Source
    Edén Sorolla · Juan Ramón Mosig · Michael Mattes

    Full-text · Dataset · Jun 2013
  • Edén Sorolla · Juan Ramón Mosig · Michael Mattes
    [Show abstract] [Hide abstract]
    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.
    No preview · Article · Apr 2013 · IEEE Transactions on Antennas and Propagation
  • Source
    Dataset: Corona2010

    Full-text · Dataset · Feb 2013
  • [Show abstract] [Hide abstract]
    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.
    No preview · Conference Paper · Jan 2013