Prohlížení Fakulta elektrotechnická dle autora "Macháč, J."
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A Planar Version of A Slotline Leaky Wave Antenna with a Stacked Substrate
Autor: Macháč, J.; Pavliš, A.; Houška, M.; Zehentner, J.
(IEEE, 2008-05)This paper presents a new version of a leaky wave antenna based on a conductor-backed slotline with a stacked substrate. The advantage of this new structure is its flat top surface, due to the antenna being fed from the ... -
Analysis of discontinuities in waveguiding structures by MAB method
Autor: Macháč, J.
(IEEE, 1992-08)The method of minimal autonomous blocks (MAB) is briefly described. A universal code computing reflectivity and transmissivity of discontinuities in waveguide structures was developed on the basis of the MAB method. This ... -
Coupling of split ring resonators in a mu-negative volumetric metamaterial
Autor: Macháč, J.; Zehentner, J.; Bláha, M.
(IEEE, 2008-06)This paper presents an experimental and theoretical study of the coupling of split ring resonators, and aims to show ways to widen the frequency band of the response of mu-negative metamaterials. The behaviour of these ... -
Effect of feedback carrier excitation on LED external quantum efficiency
Autor: Kučera, L.; Macháč, J.; Míšek, J.
(IEEE, 1982-02)Self-absorption of photons generated by prior luminescence processes affects both the steady-state and transient characteristics of LEDs. In this study we confine ourselves to one of the most important steadystate ... -
Evolution of New Real and Complex Improper Solutions of the Slotline Dispersion Equation
Autor: Zehentner, J.; Macháč, J.; Migliozzi, M.
(IEEE, 1997-09)An attempt is made in this paper to reach a better understanding of the behaviour of open uniplanar circuits, particularly the slotline. A new second leaky wave has been revealed in addition to the dominant bound and leaky ... -
Load Impedances of Complex Slotline Terminations
Autor: Macháč, J.; Zehentner, J.; Menzel, W.
(IEEE, 1995-09)Single slotline has gained new interest due to application in uniplanar circuits, antennas or active radiators, all these including slotline short circuits or even more complex terminations. This paper gives a new approach ... -
Properties of CPW in the sub-mm wave range and its potential to radiate
Autor: Zehentner, J.; Macháč, J.
(IEEE, 2000) -
Spurious leaky mode solutions and experimental verification of the second leaky wave
Autor: Zehentner, J.; Macháč, J.; Mrkvica, J.; Vacek, P.; Polívka, J.
(IEEE, 1999)This paper presents the revelation of spurious leaky mode solutions of the dispersion equation, and experimental confirmation of the occurrence of the second leaky wave on the slotline. The appearance of the spurious ... -
Static model of DH laser
Autor: Macháč, J.
(IEEE, 1983-04)A method of complex analysis of the double-heterostructure stripe-geometry laser, based on a new static model, is presented. The optical field distribution in the active region of the laser is described by the wave equation. ...