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Tittelen til dette temanummeret er hentet fra et seminar Velferdsforum ved Universitetet i Bergen arrangerte i april 2016… Expand Professor Per-Simon Kildal passed away on April 21, 2016, at age 65. Since 1989, he was a Professor with Chalmers University of… Expand The directivity as well as the gain of an antenna element associated with a finite length reflector, which includes a feed… Expand In this paper the steps that led to gap waveguide conception are surveyed. The review includes a background analysis as well as a… Expand Per-Simon's rise to fame started at the Norwegian University of Science and Technology in Trondheim in the late 1970s. In this… Expand Professor Per-Simon Kildal passed away on April 21, 2016, after a very short period of illness. He was born on July 4, 1951. He… Expand Per-Simon and I studied and worked together over a period of almost 15 years, first at the Technical University and later at the… Expand In the present paper, the Kirchhoff's Current Law (KCL) is re-considered as a cloaking condition for structures based on… Expand The goal with this project was to produce an eight-band WWAN/LTE handset antenna supporting MIMO, by using a tunable matching… Expand In this paper the explicit (“obvious”) relation between mean effective gain of an antenna and its radiation efficiency has been… Expand