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Near field of the dipole antennas
Beran, Vlastimil ; Tkadlec, Roman (referee) ; Nováček, Zdeněk (advisor)
The thesis describes the radiation of dipole antennas in near field area. More methods for evaluation of spatial dipole field arrangement are compared. The work target for practical use is to create software for simulation of near field values placed in planar or cylindrical observation plane. The computer programme is applicable to single dipole or dipole array. The limits for human body exposition of non-ionizing radiation are here implemented for compliance purpose in hygienic evaluations. The simulated results of field distribution are possible to display as graphs or save to data file. The results of own calculation are compared with results obtained by some commercial software as well by measurement of field components under model conditions.
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Baluns
Beran, Vlastimil ; Puskely, Jan (referee) ; Nováček, Zdeněk (advisor)
The baluns (balanced to unbalanced) circuits are used for connection of symmetrical load (antenna, dipole) to unsymmetrical line (coaxial cable). The balun missing causes the load mismatching to antenna feeder and the antenna parameters degradation as result. There are defined the baluns principle of operation and list of types in this work. The baluns created by short sections lines are the scope of project only. The detailed analysis baluns bandwidth and the type application are described in the second part of project. Several recommendation for baluns design is described as project conclusion including parameters optimalization. The function of the balun was verified by measurement. The relevant results are mentioned in the report end.
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Baluns
Beran, Vlastimil ; Puskely, Jan (referee) ; Nováček, Zdeněk (advisor)
The baluns (balanced to unbalanced) circuits are used for connection of symmetrical load (antenna, dipole) to unsymmetrical line (coaxial cable). The balun missing causes the load mismatching to antenna feeder and the antenna parameters degradation as result. There are defined the baluns principle of operation and list of types in this work. The baluns created by short sections lines are the scope of project only. The detailed analysis baluns bandwidth and the type application are described in the second part of project. Several recommendation for baluns design is described as project conclusion including parameters optimalization. The function of the balun was verified by measurement. The relevant results are mentioned in the report end.
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Near field of the dipole antennas
Beran, Vlastimil ; Tkadlec, Roman (referee) ; Nováček, Zdeněk (advisor)
The thesis describes the radiation of dipole antennas in near field area. More methods for evaluation of spatial dipole field arrangement are compared. The work target for practical use is to create software for simulation of near field values placed in planar or cylindrical observation plane. The computer programme is applicable to single dipole or dipole array. The limits for human body exposition of non-ionizing radiation are here implemented for compliance purpose in hygienic evaluations. The simulated results of field distribution are possible to display as graphs or save to data file. The results of own calculation are compared with results obtained by some commercial software as well by measurement of field components under model conditions.
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