This bolometric detector for electromagnetic radiation comprises: a first and a second crossed bow-tie antenna intended to collect electromagnetic radiation; a resistive load coupled to said antennas in order to convert the collected electromagnetic power into calorific power; a bolometric micro bridge structure suspended above substrate by support and thermal isolation arms with the micro bridge comprising: the resistive load; a thermometric element coupled to resistive load so that its temperature can rise due to the effect of the calorific power produced. The first antenna is located outside micro bridge and is capacitively coupled with the resistive load and the second antenna is located in micro bridge and is resistively coupled with the resistive load.