Aerosol-generating device

Abstract

Disclosed is an aerosol-generating device. The aerosol-generating device includes a body and a radiating unit disposed in the body, and providing an insertion space in which an aerosol-generating article is accommodated, wherein the radiating unit includes an antenna surrounding the insertion space, the antenna being configured to emit microwaves for dielectrically heating the aerosol-generating article, and a hollow dielectric disposed inside the antenna to support the antenna, the dielectric having the insertion space provided therein, and wherein the dielectric includes at least one of quartz, glass, ceramic, polyimide, or polytetrafluoroethylene.

What is claimed is: 
     
         1 . An aerosol-generating device comprising:
 a body; and   a radiating unit disposed in the body, and providing an insertion space in which an aerosol-generating article is accommodated,   wherein the radiating unit comprises:   an antenna surrounding the insertion space, the antenna being configured to emit microwaves for dielectrically heating the aerosol-generating article; and   a hollow dielectric disposed inside the antenna to support the antenna, the dielectric having the insertion space provided therein, and   wherein the dielectric comprises at least one of quartz, glass, ceramic, polyimide, or polytetrafluoroethylene.   
     
     
         2 . The aerosol-generating device according to  claim 1 , wherein a material constituting the dielectric has a loss tangent of 0.01 or less. 
     
     
         3 . The aerosol-generating device according to  claim 1 , wherein
 a width of the dielectric, defined in a longitudinal direction of the insertion space, is greater than a width of the antenna, and   in the longitudinal direction of the insertion space, an upper end of the dielectric is disposed higher than an upper end of the antenna and a lower end of the dielectric is disposed lower than a lower end of the antenna.   
     
     
         4 . The aerosol-generating device according to  claim 1 , wherein the antenna is printed on or attached to an outer circumferential surface of the dielectric. 
     
     
         5 . The aerosol-generating device according to  claim 4 , wherein the antenna is wound along a groove formed on the outer circumferential surface of the dielectric. 
     
     
         6 . The aerosol-generating device according to  claim 1 , wherein the radiating unit is configured such that the antenna is disposed on one surface of a single sheet elongated in one direction and the antenna is wound around an outer circumferential surface of the dielectric together with the sheet. 
     
     
         7 . The aerosol-generating device according to  claim 6 , wherein
 the sheet comprises polyimide, and   the dielectric comprises at least one of quartz, glass, ceramic, or polytetrafluoroethylene.   
     
     
         8 . The aerosol-generating device according to  claim 1 , wherein
 the dielectric has a form of a single sheet extending in one direction, and   the radiating unit is configured such that the antenna is disposed on one surface of the dielectric and the dielectric is rolled into a hollow shape.   
     
     
         9 . The aerosol-generating device according to  claim 8 , wherein the radiating unit comprises at least one layer formed by the dielectric, the at least one layer being disposed inside and outside the antenna in a radial direction of the insertion space. 
     
     
         10 . The aerosol-generating device according to  claim 1 , further comprising:
 a first bracket coupled to one side of the radiating unit corresponding to an opening of the insertion space, the first bracket having an insertion opening in communication with the insertion space; and   a second bracket coupled to the other side of the radiating unit, the second bracket blocking at least a portion of the other side of the insertion space.   
     
     
         11 . The aerosol-generating device according to  claim 10 , wherein each of the first and second brackets comprises at least one of quartz, glass, ceramic, polyimide, or polytetrafluoroethylene. 
     
     
         12 . The aerosol-generating device according to  claim 1 , wherein
 the radiating unit comprises a shielding portion configured to prevent the microwaves from being emitted out of the radiating unit, and   the shielding portion surrounds an outside of the antenna and is spaced apart from the antenna in a radial direction of the insertion space.   
     
     
         13 . The aerosol-generating device according to  claim 12 , wherein the shielding portion comprises a metallic material. 
     
     
         14 . The aerosol-generating device according to  claim 1 , wherein the antenna comprises a meander antenna or a helical antenna.