Aerosol generating device having improved inductor coil

Abstract

An aerosol generating device is provided having an induction heater for heating an aerosol-generating article using a susceptor. [Solution] The aerosol generating device comprises a housing (120) defining a chamber (111) for receiving a susceptor (130) and an aerosol generating substrate (22), and has a length along a longitudinal axis extending from a first end to a second end of the chamber, and an inductor coil (140) is provided within the housing, arranged around the chamber, extending along a portion of the length of the chamber, and comprising a first portion (141) arranged closest to the first end of the chamber, a second portion (142) arranged closest to the second end of the chamber, and a third portion (143) arranged between the first and second portions, wherein the number of turns per unit length of the third portion is less than the number of turns per unit length of one or both of the first and second portions, and the cross-sectional area of ​​the coil of the third portion is smaller than the cross-sectional area of ​​the coil of one or both of the first and second portions.