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Michael Mattes

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Related publications (86)

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Improved Computation of Propagation Losses in Waveguide Structures Using Perturbation of Boundary Conditions

Michael Mattes

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 t ...

Institution of Engineering and Technology2011

Contribution to the RF Breakdown in Microwave Devices and its Prediction

Juan Ramon Mosig, Michael Mattes

In this paper, the RF Breakdown power threshold in arbitrary complex components based on rectangular waveguide technology is investigated. In particular, multipactor (in vacuum) and corona discharge (close to the Paschen curve minimum) are analyzed. The ob ...

2006

Space charge effects for multipactor in coaxial lines

Michael Mattes, Francisco Edén Sorolla Rosario, Apostolos Sounas

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 t ...

American Institute of Physics2015

Numerical Assessment of Brain Stroke Follow-Up via Differential Microwave Imaging

Juan Ramon Mosig, Michael Mattes, Mina Bjelogrlic

This paper proposes a numerical assessment of brain stroke follow-up via differential Microwave Imaging. The aim is to follow the evolution of the patient’s stroke growth and location, in order to support decisions in the clinical treatment. We present a f ...

2015

Compound field integral equation approach for analyzing quasi-waveguide structures

Juan Ramon Mosig, Michael Mattes, Laleh Golestanirad

2009

Applying combined field integral equation technique to analyze quasi-waveguide structures

Juan Ramon Mosig, Michael Mattes, Laleh Golestanirad

In this paper a detailed mathematical procedure is described to evaluate modal scattering parameters conventionally defined in planar multilayered structures excited by wave ports. Combined Field Integral Equation technique is implemented and solved using ...

2009

Efficient Analysis of Shielding Effectiveness of Metallic Rectangular Enclosures Using Unconditionally Stable Time-Domain Integral Equations

Juan Ramon Mosig, Michael Mattes, Hamidreza Karami

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 aper ...

2014

Prediction of Multipactor Breakdown for Multicarrier Applications: The Quasi-Stationary Method

Michael Mattes

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. ...

Institute of Electrical and Electronics Engineers2012

Globally convergent algorithm to find the zeros of the cross-product of Bessel functions

Michael Mattes, Francisco Edén Sorolla Rosario

This paper shows the construction of an algorithm to calculate the roots of both, the cross-product of Bessel functions respectively of their first derivatives. The algorithm has shown globally convergent behavior for a large range of values of the argumen ...

2011

Effect of Model Accuracy on the Result of Computed Current Densities in the Simulation of Transcranical Magnetic Stimulation

Juan Ramon Mosig, Michael Mattes, Laleh Golestanirad

One of the most hindering limitations in the simulation of a realistic biological system is the complexity of the model which may easily lead to a very heavy computational burden. This may seriously question the possibility of optimizing system parameters ...

Institute of Electrical and Electronics Engineers2010

Multipactor Analysis in Parallel-Plate Waveguides Loaded by a Single Dielectric Slab

Michael Mattes, Francisco Edén Sorolla Rosario, Apostolos Sounas

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. ...

2014

Volume Integral Equation Formulation for Medical Applications

Juan Ramon Mosig, Michael Mattes, Ioannis Koufogiannis, Santiago Capdevila Cascante, Mina Bjelogrlic

In recent years, there is a considerable and growing interest in developing fast integral equation methods for solving Maxwell’s equations. Volume integral equations are a versatile technique to model inhomogeneous scattering objects. Numerical tests show ...

2015

Prediction of RF breakdown in microwave structures for satellite applications with FEST3D

Juan Ramon Mosig, Michael Mattes

In this paper, a software tool for the prediction of the corona discharge and the multipactor thresholds in passive components based on rectangular geometry for space applications is presented.The software tool has been compare to measurements showing a ve ...

2006

On the born approximation for differential microwave imaging using volume integral equation formulation

Juan Ramon Mosig, Michael Mattes, Benjamin Fuchs, Benjamin Fuchs, Mina Bjelogrlic

The Degree of Non-Linearity (DNL) of scattering problems and specifically of differential Microwave Imaging (dMWI) problems is addressed in this paper. The quantification of the DNL amounts to evaluate the validity range of the Born first order (linear) ap ...

2016

Rigorous Investigation of RF Breakdown Effects in High Power Microstrip Passive Circuits

Juan Ramon Mosig, Michael Mattes

This work presents a new rigorous investigation of corona effects in microstrip components. To carry out the investigation, a new software tool has been developed. The new tool first calculates the electromagnetic fields in complex microstrip structures us ...

2009

Power Sub-Miniature (PSM) Connectors for Space Applications

Michael Mattes, Francisco Edén Sorolla Rosario

This paper presents a newly developed SMA-like connector for High Power Space applications that can withstand more than 1500 Watts in the P- and L-Band for a pulsed signal of 2% duty-cycle. This implies an improvement of 50 per cent compared to other power ...

2011

Accurate Software Tool for the Prediction of RF Breakdown in Microstrip Transmission Lines

Juan Ramon Mosig, Michael Mattes

In this paper, a full-wave software tool for the accurate prediction of the RF breakdown in microstrip transmission lines is presented. The main objective of the project is to develop a software tool capable to predict the Multipactor and Corona breakdown ...

2009

High Power SMA Connectors

Michael Mattes, Francisco Edén Sorolla Rosario

On board of satellites traditionally Travelling Wave Tube Amplifiers (TWTAs) together with standard waveguide technology were used for transmitters in telecommunication payload systems. With the advent of Solid State Power Amplifiers (SSPAs) printed circui ...

2008

On the Development and Evaluation of Spatial-Domain Green's Functions for Multilayered Structures With Conductive Sheets

Juan Ramon Mosig, Michael Mattes, Ioannis Koufogiannis

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 th ...

Institute of Electrical and Electronics Engineers2015

A Recursive Acceleration Technique for Static Potential Green's Functions of a Rectangular Cavity Combining Image and Modal Series

Juan Ramon Mosig, Michael Mattes, Sergio Lopez Pena

A hybrid acceleration algorithm for the computation of the static potential Green’s functions of a rectangular cavity is proposed. Similarly to Ewald’s method, it combines the series expansions in terms of images and modes. The main particularity with resp ...

Institute of Electrical and Electronics Engineers2011