The invention relates to an antenna system for electromagnetic waves in a microwave range. At least one directional antenna such as a Vivaldi antenna and/or an omnidirectional antenna such as a dipole antenna, with at least one central unit including at least one active member which is connectible with at least one reception/transmission system is disclosed. To make the system more flexible, the plugged-in antenna is capacitively coupled to at least one motherboard of the central unit and a booster module, an attenuation module, a calibration module, a combiner module, a filter module, or a passive module is optionally pluggable in the central unit to provide a pluggable module. The functionality of the central unit is determined based on the plugged-in module.
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