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Kategoriserade artiklar på KTHs webbplats.

Antal träffar: 5

  • Lightning and Lightning Protection

    Lightning strikes to unprotected structures can lead to disastrous consequences due to loss of life and damage or destruction of property. The multidisciplinary work on this research area focuses on the study of fundamental physical aspects on lightning flashes and the usage of this knowledge to mitigate the effects of the high currents and electromagnetic fields generated during lightning strikes to structures.

  • Electromagnetic compatibility (EMC)

    The research on electromagnetic compatibility explores the mechanism by which various sources produce electromagnetic disturbances, how disturbances couple to and affect other systems, and how the systems can be protected against electromagnetic interference, and thereby enhance its reliability. The research is multidisciplinary where electrical engineering, electromagnetics and physics of materials come together.

  • Electromagnetic theory

    The research is focused on the basic macroscopic electromagnetic laws as they apply to the generation and propagation of electromagnetic effects in vacuum, in material media, and in all the various devices that may be constructed to enhance, control, and utilize such effects. Thus the use and further development of all the methods - analytic, numerical, and also experimental - which are relevant for such an endeavour, are of prime interest to us.

  • Antenna theory and design

    Electromagnetic waves are launched and received by antennas. Antennas are used in many applications, such as wireless communications, radar systems, radio-astronomy, medicine and security scanners. Our research is focused on optimal antennas, arrays, lens antennas and leaky wave antennas.

  • Electromagnetic metamaterials and metasurfaces

    Metamaterials are materials that possess unusual macroscopic electromagnetic behaviour created by their sub-wavelength periodic structure. This field of research began its life in the realms of theoretical physics, moving more recently into the engineering domain. The full opportunities offered by metamaterials were finally exploited when the concept of metasurfaces was recently introduced. Metasurfaces are thin metamaterial layers, which can be employed to produce unusual reflection and transmission properties of incident plane waves, to prevent the propagation of electromagnetic waves or to guide surface waves with a plasmonic response. These metasurfaces are used to control the propagation of electromagnetic surface waves by modulation of the surface impedance.