研究目的
Investigating the design and performance of a wideband circularly polarized microstrip patch antenna embedded in the human body for implantable medical devices.
研究成果
The study successfully demonstrates the design of an implantable wideband circularly polarized microstrip patch antenna that achieves a wide 3-dB AR bandwidth covering the 2.4 to 2.48 GHz ISM band. The antenna shows good tolerance to variations in tissue properties and implant depth, making it suitable for biomedical applications. The fabricated prototype's performance aligns well with simulations, validating the design approach.
研究不足
The study is limited by the simplification of the human body model to a single-layered skin model, which may not fully capture the complexity of actual human tissue. Additionally, the practical implantation depth and the variability of tissue properties among individuals could affect the antenna's performance.
1：Experimental Design and Method Selection:
The study involves the design of a microstrip patch antenna (MPA) that excites two pairs of degenerate modes (TM10/TM01 and TM30/TM03) to achieve wideband circular polarization. The methodology includes theoretical modeling and simulation to optimize the antenna's performance.
2：Sample Selection and Data Sources:
The antenna is designed to operate within the human body, specifically targeting the 2.4 to 2.48 GHz ISM band. The human body is modeled as a single-layered skin model for simulation purposes.
3：4 to 48 GHz ISM band. The human body is modeled as a single-layered skin model for simulation purposes.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: The antenna is printed on Rogers RO6010 substrate (εr = 10.2, tanδ = 0.0023) with a thickness of 0.635 mm. The design includes stubs and shorting pins for mode excitation and bandwidth enhancement.
4：2, tanδ = 0023) with a thickness of 635 mm. The design includes stubs and shorting pins for mode excitation and bandwidth enhancement.
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The design process involves simulation to adjust the antenna's parameters for optimal performance, followed by fabrication and testing in a pork model to mimic human tissue.
5：Data Analysis Methods:
The performance of the antenna is evaluated based on its reflection coefficient (|S11|), axial ratio (AR) bandwidth, and specific absorption rate (SAR) to ensure compliance with safety standards.
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