Microwave Antenna Support Structure for Aerosol Heating Reliability
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Solution Overview
Problem
Conventional aerosol-generating devices using dielectric heating suffer from antenna damage and deformation due to insertion/removal of aerosol-generating articles and heat exposure, and there is a need for improved microwave permeability and protection mechanisms.
Innovation Solution
Incorporating a heat-resistant, microwave-permeable dielectric material inside the antenna to support it, along with a shielding portion and a bracket that enhances microwave transmission while preventing deformation and leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the antenna is surrounded by the insertion space without internal support, then the device structure is simpler, but the antenna is damaged during insertion and removal of the aerosol-generating article
Solution Approach 1:
A dielectric member is introduced as an intermediary component between the antenna and the insertion space. This dielectric member provides mechanical support to the antenna during insertion and removal operations, preventing damage while maintaining microwave permeability due to its low dielectric loss properties.
Solution Approach 2:
The dielectric member is configured as a thin-walled hollow structure that surrounds part of the insertion space. This thin-film approach provides necessary mechanical support while minimizing interference with microwave transmission and keeping the overall structure compact.
2Temperature
If the antenna is exposed to heat from the aerosol-generating article, then the heating function is effective, but the shape of the antenna is deformed by heat
Solution Approach 1:
The dielectric member acts as a thermal barrier between the heated aerosol-generating article and the antenna. It allows microwave transmission for effective heating while providing thermal protection to maintain antenna shape stability through its heat-resistant properties.
Solution Approach 2:
The dielectric member is selected with specific material properties (low dielectric loss, high heat resistance) that change the thermal and electromagnetic parameters of the system, enabling the antenna to withstand high temperatures without deformation while maintaining heating effectiveness.
3Reliability
If a dielectric member is added inside the antenna to support it, then the antenna is protected from damage and heat deformation, but the microwave radiation efficiency may be reduced
Solution Approach 1:
The dielectric member is configured with localized thickness variations and positioning that provide mechanical support and thermal protection only where needed, while minimizing the overall dielectric volume that could interfere with microwave transmission. The thin-walled design ensures protection functionality with minimal energy loss.
Solution Approach 2:
The dielectric member is selected with specific material properties (low dielectric loss tangent) that minimize microwave energy absorption. By carefully controlling the dielectric parameters and geometric configuration, the system achieves both protection and maintained radiation efficiency.
4Volume of moving object
If the radiating unit is designed with compact components, then the device size is reduced, but the manufacturing process becomes more complex
Solution Approach 1:
The dielectric member integrates multiple functions: it provides mechanical support for the antenna, acts as a thermal barrier, and serves as a structural component defining the insertion space. This multi-functionality reduces the need for separate components, simplifying manufacturing despite the compact design.
Solution Approach 2:
The dielectric member is designed as a universal component that simultaneously performs mechanical support, thermal insulation, and electromagnetic wave transmission functions. This multi-functional design reduces the total number of parts and assembly steps, making manufacturing easier while maintaining compact dimensions.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution prevents antenna damage, maintains microwave radiation efficiency, and simplifies the manufacturing process by reducing the size and volume of the radiating unit.
Implementation Method 1
the dielectric includes at least one of quartz, glass, ceramic, polyimide, or polytetrafluoroethylene
Implementation Method 2
an antenna surrounding the insertion space, the antenna being configured to emit microwaves for dielectrically heating the aerosol-generating article
Data Source
AI summary
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.