Národní úložiště šedé literatury Nalezeno 2 záznamů.  Hledání trvalo 0.00 vteřin. 
(Sub)millimeter-Wave Antennas
Pítra, Kamil ; Křesálek,, Vojtěch (oponent) ; Küppers, Franko (oponent) ; Raida, Zbyněk (vedoucí práce)
The thesis deals with the design and optimization of circularly polarized antennas for THz frequencies. In the thesis, a simplified theory of THz sources is presented, and a suitable antenna for a THz source is designed. The design is focused on achieving circular polarization from linearly polarized antennas. In order to suppress surface waves on an electrically dense dielectric substrate, we design and optimize specific periodic structures. The design of such a structure is rather complicated since the relation between electromagnetic band gap (EBG) properties and unit cell geometry is not straightforward. In order to properly focus the radiated energy, we design and optimize a partially reflective surface (PRS) acting as a planar lens for the THz antenna.
(Sub)millimeter-Wave Antennas
Pítra, Kamil ; Křesálek,, Vojtěch (oponent) ; Küppers, Franko (oponent) ; Raida, Zbyněk (vedoucí práce)
The thesis deals with the design and optimization of circularly polarized antennas for THz frequencies. In the thesis, a simplified theory of THz sources is presented, and a suitable antenna for a THz source is designed. The design is focused on achieving circular polarization from linearly polarized antennas. In order to suppress surface waves on an electrically dense dielectric substrate, we design and optimize specific periodic structures. The design of such a structure is rather complicated since the relation between electromagnetic band gap (EBG) properties and unit cell geometry is not straightforward. In order to properly focus the radiated energy, we design and optimize a partially reflective surface (PRS) acting as a planar lens for the THz antenna.

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