2018 48th European Microwave Conference (EuMC), 2018
A dual-band bandpass filter consisting of multiconductor transmission lines (MTL) and shunt stubs... more A dual-band bandpass filter consisting of multiconductor transmission lines (MTL) and shunt stubs has been designed. The used topology, based on the interconnection of two identical MTL and a shunt open stub, has a frequency response that can be modelled by using the generalized Chebyshev functions. A prototype of a 4 fingers-MTL is manufactured and measured and a good agreement between analytical and measured results is obtained. Furthermore, it is easy to get a design criterion that enables getting good responses varying just a few parameters.
Enrique Márquez-Segura(1), Willian J. Otter(2), Stepan Lucyszyn(2), Nick Ridler(3) ems@ic.uma.es,... more Enrique Márquez-Segura(1), Willian J. Otter(2), Stepan Lucyszyn(2), Nick Ridler(3) ems@ic.uma.es, s.lucyszyn@ic.ac.uk, nick.ridler@npl.co.uk. Dpto. de Ingenierı́a de Comunicaciones, E.T.S. Ingenierı́a de Telecomunicación, Universidad de Málaga, Bulevar Louis Pasteur 35, 29010, Málaga. Department of Electrical and Electronic Engineering, Imperial College London, London SW7 2AZ, U.K. Electromagnetic & Electrochemical Department, National Physical Laboratory, Teddington TW11 0LW, U.K.
In this work, an optimized broadband method using multilayer transmission lines to characterize d... more In this work, an optimized broadband method using multilayer transmission lines to characterize dielectric permittivity and loss tangent of material samples is presented. For this purpose, a microstrip line loaded with a piece of the selected dielectric to be characterized is used. From two-port measurements, and using different length lines, the propagation constant can be obtained. To minimize random errors and to improve the accuracy, an overdetermination of the method increasing the number of lines measured and a criterion to choose the optimal line lengths is considered. First, the measurement method itself is applied to uncovered microstrip lines and an accurate model of the substrate is obtained. Second, the lines are covered with several materials, made by fused deposition modeling (FDM) additive manufacturing technique, such as acrylonitrile butadiene styrene (ABS), polylactic acid (PLA), high impact polystyrene (HIPS), thermoplastic polyurethane (TPU), copolyester (CPE), F...
Este trabajo ha sido financiado con fondos del proyecto ITC-20181093 CARCIS – Car Assisted with R... more Este trabajo ha sido financiado con fondos del proyecto ITC-20181093 CARCIS – Car Assisted with Radar and Camera Intelligent Sensors cofinanciado con fondos FEDER y CDTI. Universidad de Malaga. Campus de Excelencia Internacional Andalucia Tech.
Resumen—In this work, a method for the characterization of the relative permittivity in broadband... more Resumen—In this work, a method for the characterization of the relative permittivity in broadband of 3D printing materials is proposed. It uses microstrip lines of different lengths covered with the material to be characterized. Once S-parameters of the structure are obtained, some transformations are performed, using transmission parameters and the line length differences, in order to obtain the propagation constant of the lines, from which it is possible to extract the characteristics of the material to be studied. The method has been tested by manufacturing and measuring lines covered with ABS material, showing results very close to those of electromagnetic simulation and those shown in the literature for this material.
ABSTRACT A SIMULINK toolbox has been developed to analyse the propagation phenomena in transmissi... more ABSTRACT A SIMULINK toolbox has been developed to analyse the propagation phenomena in transmission lines. The toolbox considers the equivalent circuit of transmission lines and models the behaviour as a linear system in order to be included in the SIMULINK graphic environment. The non-linear propagation phenomenon is studied from a variable capacitance as a function of the applied voltage transmission line. A flexible, fast and accurate tool is provided to students and lecturers.
2018 48th European Microwave Conference (EuMC), 2018
A dual-band bandpass filter consisting of multiconductor transmission lines (MTL) and shunt stubs... more A dual-band bandpass filter consisting of multiconductor transmission lines (MTL) and shunt stubs has been designed. The used topology, based on the interconnection of two identical MTL and a shunt open stub, has a frequency response that can be modelled by using the generalized Chebyshev functions. A prototype of a 4 fingers-MTL is manufactured and measured and a good agreement between analytical and measured results is obtained. Furthermore, it is easy to get a design criterion that enables getting good responses varying just a few parameters.
Enrique Márquez-Segura(1), Willian J. Otter(2), Stepan Lucyszyn(2), Nick Ridler(3) ems@ic.uma.es,... more Enrique Márquez-Segura(1), Willian J. Otter(2), Stepan Lucyszyn(2), Nick Ridler(3) ems@ic.uma.es, s.lucyszyn@ic.ac.uk, nick.ridler@npl.co.uk. Dpto. de Ingenierı́a de Comunicaciones, E.T.S. Ingenierı́a de Telecomunicación, Universidad de Málaga, Bulevar Louis Pasteur 35, 29010, Málaga. Department of Electrical and Electronic Engineering, Imperial College London, London SW7 2AZ, U.K. Electromagnetic & Electrochemical Department, National Physical Laboratory, Teddington TW11 0LW, U.K.
In this work, an optimized broadband method using multilayer transmission lines to characterize d... more In this work, an optimized broadband method using multilayer transmission lines to characterize dielectric permittivity and loss tangent of material samples is presented. For this purpose, a microstrip line loaded with a piece of the selected dielectric to be characterized is used. From two-port measurements, and using different length lines, the propagation constant can be obtained. To minimize random errors and to improve the accuracy, an overdetermination of the method increasing the number of lines measured and a criterion to choose the optimal line lengths is considered. First, the measurement method itself is applied to uncovered microstrip lines and an accurate model of the substrate is obtained. Second, the lines are covered with several materials, made by fused deposition modeling (FDM) additive manufacturing technique, such as acrylonitrile butadiene styrene (ABS), polylactic acid (PLA), high impact polystyrene (HIPS), thermoplastic polyurethane (TPU), copolyester (CPE), F...
Este trabajo ha sido financiado con fondos del proyecto ITC-20181093 CARCIS – Car Assisted with R... more Este trabajo ha sido financiado con fondos del proyecto ITC-20181093 CARCIS – Car Assisted with Radar and Camera Intelligent Sensors cofinanciado con fondos FEDER y CDTI. Universidad de Malaga. Campus de Excelencia Internacional Andalucia Tech.
Resumen—In this work, a method for the characterization of the relative permittivity in broadband... more Resumen—In this work, a method for the characterization of the relative permittivity in broadband of 3D printing materials is proposed. It uses microstrip lines of different lengths covered with the material to be characterized. Once S-parameters of the structure are obtained, some transformations are performed, using transmission parameters and the line length differences, in order to obtain the propagation constant of the lines, from which it is possible to extract the characteristics of the material to be studied. The method has been tested by manufacturing and measuring lines covered with ABS material, showing results very close to those of electromagnetic simulation and those shown in the literature for this material.
ABSTRACT A SIMULINK toolbox has been developed to analyse the propagation phenomena in transmissi... more ABSTRACT A SIMULINK toolbox has been developed to analyse the propagation phenomena in transmission lines. The toolbox considers the equivalent circuit of transmission lines and models the behaviour as a linear system in order to be included in the SIMULINK graphic environment. The non-linear propagation phenomenon is studied from a variable capacitance as a function of the applied voltage transmission line. A flexible, fast and accurate tool is provided to students and lecturers.
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