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In this paper, we treat the robust tracking problem for uncertain systems with value bounded uncertainties in the state matrix. The Linear Quadratic control is used and the state variables are provided by an observer which is based on the nominal system. The condition of feedback quadratic stability is implicitly guaranteed when the condition. under which the tracking error is bounded, is verified...
The present paper deals with two common test sites, namely the GTEM cell and the Crawford cell. It is shown, what are the fields inside an empty cell and how they change when the cell is loaded with an EUT.
Modeling a TEM cell with a numerical field calculation program, the total electric and magnetic field inside the cell can be calculated only. The contribution of higher order modes can not be isolated. This article provides a method to extract higher order mode fields out of the total field and a procedure to determine the resonant frequencies and the type of higher order modes appearing in a Crawford...
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