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- Miloslav Capek, Pavel Hazdra, Jan Eichler
- IEEE Transactions on Antennas and Propagation
- 2012

A new formula for the evaluation of the modal radiation Q factor is derived. The total Q of selected structures is to be calculated from the set of eigenmodes with associated eigen-energies and… (More)

A new method for tracking characteristic numbers and vectors appearing in the Characteristic Mode Theory is presented in this paper. The challenge here is that the spectral decomposition of the… (More)

- Miloslav Capek, Lukas Jelinek, Pavel Hazdra, Jan Eichler
- IEEE Transactions on Antennas and Propagation
- 2014

New expressions are derived to calculate the Q factor of a radiating device. The resulting relations link Q based on the frequency change of the input impedance at the input port (QX, QZ) with… (More)

- Miloslav Capek, Pavel Hamouz, Pavel Hazdra, Jan Eichler
- IEEE Antennas and Propagation Magazine
- 2013

This paper describes the implementation of a complex MATLAB tool to calculate the characteristic modes and associated antenna parameters. The first code, written in FORTRAN, was presented in the… (More)

- Jan Eichler
- 1978

Durch Verwendung von Masken oder Nasenansatzstücken treten bei der Rhinomanometrie Veränderungen in der Wirbelbildung auf. Die systematischen Verfälschungen der Messung durch diese Effekte wird für… (More)

- Miloslav Capek, Pavel Hazdra, Jan Eichler, Pavel Hamouz, Milos Mazanek, Veronika Sobotíková
- 6th European Conference on Antennas and…
- 2012

The total Q of selected structures is to be calculated from the set of eigenmodes with associated eigen-energies and eigen-powers. Thanks to the analytical expression of these quantities, the… (More)

- Jan Eichler
- 2013

The focus of this Diploma thesis is the development of a new approach for the analysis of crystal orientations in polar ice, based on digital image processing. The c-axes orientations are measured on… (More)

- Pavel Hazdra, Miloslav Capek, Jan Eichler, Tomas Korinek, Milos Mazanek
- 6th European Conference on Antennas and…
- 2012

The chosen rectangular and fractal microstrip patch antennas above an infinite ground plane are analyzed by the Theory of characteristic modes. The resonant frequencies and radiation Q are evaluated.… (More)

- Pavel Hazdra, Miloslav Capek, Jan Eichler
- IEEE Antennas and Wireless Propagation Letters
- 2011

In this letter, we present an investigation of the radiation Q-factors of two coupled thin dipole antennas with sinusoidal current distribution. The approach is based on novel rigorous equations for… (More)

This study describes an effective technique for calculating modal radiation efficiency calculation based on decomposition into characteristic modes. The key assumption is that the current… (More)