A5072771962- Microwave Imaging and Scattering Analysis
- Microwave and Dielectric Measurement Techniques
- Energy Harvesting in Wireless Networks
- Wireless Power Transfer Systems
- Geophysical Methods and Applications
- Sparse and Compressive Sensing Techniques
- Advanced Numerical Methods in Computational Mathematics
- Electromagnetic Simulation and Numerical Methods
- Electromagnetic Scattering and Analysis
- Advanced Battery Technologies Research
- Acoustic Wave Resonator Technologies
- Soil Moisture and Remote Sensing
- Microwave Engineering and Waveguides
- Numerical methods in inverse problems
- Innovative Energy Harvesting Technologies
- Metallurgy and Material Forming
- Induction Heating and Inverter Technology
- Advanced SAR Imaging Techniques
- Structural Analysis and Optimization
- Ultrasound in Clinical Applications
- Photoacoustic and Ultrasonic Imaging
- Numerical methods in engineering
- Structural Analysis of Composite Materials
- Seismic Imaging and Inversion Techniques
- Atomic and Subatomic Physics Research
Chalmers University of Technology
2013-2023
Traumatic brain injury is the leading cause of death and severe disability for young people a major public health problem elderly. Many patients with intracranial bleeding are treated too late, because they initially show no symptoms not transported to trauma center. There need method detect bleedings in prehospital setting. In this study, we investigate whether broadband microwave technology (MWT) conjunction diagnostic algorithm can subdural hematoma (SDH). A human cranium phantom...
Based on compressed sensing and microwave measurements, we present a procedure for the detection positioning of dielectric objects inside metal enclosure, where number is unknown but assumed to be limited. The formulation features convex quadratic optimization problem with 1-norm regularization, which allows rapid given precomputed dictionary. dictionary consists scattering parameters computed from single object placed at grid points structured that covers entire measurement region. We test...
© 2019 Progress In Electromagnetics Research B. We present an optimization procedure for wireless power transfer (WPT) applications and test it numerically a WPT system design with four resonant circuits that are magnetically coupled by coaxial coils in air, where the magnetic field problem is represented fully populated inductance matrix includes all interactions occur between coils. The resonators fed square-wave voltage generator loaded rectifier followed smoothing filter battery. compute...
Traumatic brain injury (TBI) is a major public health problem worldwide. Intracranial bleedings represents the most serious complication of TBI and need to be surgically evacuated promptly save lives mitigate injury. Microwave technology (MWT) promising as complement computed tomography (CT) used in road air ambulances for early detection intracranial bleedings. In this study, we perform numerical simulations investigate if classification algorithm based on singular value decomposition can...
a b s t r c tWe present an electromagnetic measurement system for monitoring of the effective permittivity in closed metal vessels, which are commonly used process industry.The exploits vessel as microwave cavity resonator and relative change its complex resonance frequencies is related to inside vessel.Also, thermal expansion taken into account we compensate influence on by means priori information derived from set temperature measurements.The sensitivities, that relate state measured...
We present a higher-order brick-tetrahedron hybrid method for Maxwell's equations in time domain. Brick-shaped elements are used large homogeneous parts of the computational domain, where we exploit mass-lumping and explicit time-stepping. In regions with complex geometry, use an unstructured mesh tetrahedrons that share interface brick-shaped and, at interface, tangential continuity electric field is imposed weak sense by means Nitsche's method. Implicit time-stepping together interface....
We present a brick-tetrahedron hybrid finite-element method with higher-order basis functions for solving electromagnetic field problems. For the brick-shaped elements, we use mass lumping interpolatory basis-functions of incomplete order, which yields diagonal mass-matrix. Hierarchical and/or complete order are used tetrahedral elements. enforce tangential continuity at interface in weak sense. Our correctly reproduces lowest eigenvalues correct multiplicity closed cavity-resonator. tests...
We present a procedure for system identification and tuning of wireless power transfer (WPT) with four magnetically coupled resonators, where each resonator consists coil capacitor bank. The system-identification involves three main steps: 1) individual measurement the banks in system; 2) frequency-dependent two-port impedance matrix resonators; 3) determining inductance all coils their corresponding coupling coefficients using Bayesian approach. approach solving an optimization problem we...
Wireless charging of electric vehicles is convenient but in order to make it safe the exposure humans electromagnetic fields must be below acceptable limits. We have designed a prototype system that transmits 3 kW with an efficiency 85% where magnetic around and inside vehicle are EU council recommendation $6.25\mu\text{T}$ at 85 kHz.
We present a procedure for system identification and tuning of wireless power transfer (WPT) with four magnetically coupled resonators, where each resonator consists coil capacitor bank. The system-identification involves three main steps: 1) individual measurement the banks in system; 2) frequency-dependent two-port impedance matrix resonators; 3) determining inductance all coils their corresponding coupling coefficients using Bayesian approach. approach solving an optimization problem we...
We present a Huygens' surface for the finite element method applied to Maxwell's equations, where equivalent electric and magnetic currents are incorporated in weak form by means of Nitsche's method. The proposed preserves reciprocity equations it allows computation total field inside surface, whereas on its outside only scattered is computed. current at requires double representation discontinuous tangential component we demonstrate that can be efficiently combined with previously presented...