Heater assembly and aerosol generation device comprising same

A heater assembly comprising:

• an oscillator configured to generate microwaves in a designated frequency band;
• and
• a resonance unit configured to receive the microwaves generated by the oscillator through a coupler and generate an electric field by resonating the received microwaves,
• wherein the resonance unit includes:
• an outer conductor including a lower surface, an upper surface facing the lower surface, and a side surface surrounding an inner space between the lower surface and the upper surface, and including an accommodation space for accommodating an aerosol generating article;
• a first inner conductor surrounding one region of the aerosol generating article accommodated in the accommodation space and including at least one opening into which the coupler is able to be inserted;
• and
• a second inner conductor surrounding another region of the aerosol generating article accommodated in the accommodation space.

An aerosol generating device comprising:

• a housing including an insertion hole into which an aerosol generating article is inserted;
• and
• a heater assembly configured to heat the aerosol generating article inserted through the insertion hole,
• wherein the heater assembly includes:
• an oscillator configured to generate microwaves in a designated frequency band;
• and
• a resonance unit configured to receive the microwaves generated by the oscillator through a coupler and generate an electric field by resonating the received microwaves, and
• the resonance unit includes:
• a case including a lower surface, an upper surface facing the lower surface, a side surface surrounding an inner space between the lower surface and the upper surface, an accommodation space for accommodating the aerosol generating article, and at least one opening into which the coupler is insertable in a direction from the lower surface toward the inner space;
• a plurality of plates separated from each other in a peripheral direction of the aerosol generating article accommodated in the accommodation space;
• and
• a connection portion connecting the plurality of plates to each other.