Heater assembly, aerosol-generating apparatus comprising same, and method for manufacturing same heater assembly

An aerosol generating device comprising:

• a housing having an insertion hole into which an aerosol generating article is inserted;
• and
• a heater assembly for heating the aerosol generating article inserted through the insertion hole,
• wherein the heater assembly includes an oscillating unit including a printed circuit configured to generate microwaves, a resonating unit configured to generate an electric field by resonating the microwaves, and a coupler having one end in contact with the oscillating unit and another end in contact with the resonating unit and configured to transmit the microwaves generated by the oscillating unit to the resonating unit, and the oscillating unit is stacked on the resonating unit.

A method of manufacturing a heater assembly for heating an aerosol generating article, the method comprising:

• providing a resonating unit;
• connecting a coupler to the resonating unit such that one end of the coupler is in contact with the resonating unit;
• and
• stacking an oscillating unit on the resonating unit, the oscillating unit comprising a printed circuit board stacked on the resonating unit and being in contact with another end of the coupler.