PROBLEM TO BE SOLVED: To provide an antenna system of a vivaldi antenna base.SOLUTION: The present invention relates to an antenna system for an electromagnetic wave of a micro wave range, which preferably includes: at least one directional antenna in accordance with an alternately selection; a vivaldi antenna and/or a non-directional antenna; and a dipole antenna, and includes: at least central unit having at least one active member connectable to at least one transmission system. For more soften such a system, a plug-in antenna is capacitively coupled to at least one mother board of the central unit. A booster module, a reduction module, a calibration module, a mixer module, a filter module, or a passive module can be connected to the central unit in accordance with the alternately selection. Functionality of the central unit is determined in accordance with the plug-in module.SELECTED DRAWING: Figure 10
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