57 citations · 108 across the 6 of their papers we have counts for
6 papers
On the End-Fire (Super) Directivity of an Array of Two Elementary Dipoles
Pavel Hazdra, Jan Kracek, Tomas Lonsky
The concept of source currents of a radiating source can be employed to express directivity in some particular cases analytically. For an antenna array, this concept can be combine…
Analytical Representation of Characteristic Modes Decomposition
Miloslav Capek, Pavel Hazdra, Michal Masek +1
Aspects of the theory of characteristic modes, based on their variational formulation, are presented and an explicit form of a related functional, involving only currents in a spat…
On the Functional Relation Between Quality Factor and Fractional Bandwidth
Miloslav Capek, Lukas Jelinek, Pavel Hazdra
The functional relation between the fractional band-width and the quality factor of a radiating system is investigated in this note. Several widely used definitions of the quality…
An Analytical Evaluation of The Quality Factor Qz for Dominant Spherical Modes
L. Jelinek, M. Capek, P. Hazdra +1
This paper describes an analytical evaluation of the quality factor Qz in a separable system in which the vector potential is known. The proposed method uses a potential definition…
The Measurable Q Factor and Observable Energies of Radiating Structures
M. Capek, L. Jelinek, P. Hazdra +1
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 (…
Optical Characterisation of MOVPE Grown Vertically Correlated InAs/GaAs Quantum Dots
P. Hazdra, J. Voves, J. Oswald +4
Structures with self-organised InAs quantum dots in a GaAs matrix were grown by the low pressure metal-organic vapour phase epitaxy (LP-MOVPE) technique. Photoluminescence in combi…