研究目的
Designing a miniaturized circularly polarized implantable antenna for wireless medical telemetry operating at the 915MHz ISM band to enhance biomedical communication.
研究成果
The proposed miniaturized circularly polarized implantable antenna achieves good performance at 915MHz with a compact size, improved axial ratio bandwidth, and effective circular polarization. It shows potential for wireless biomedical applications, but future work should include fabrication and experimental testing to validate the simulated results.
研究不足
The study is based on simulations only, without physical fabrication and experimental validation. The antenna's performance is evaluated in a simplified one-layer skin model, which may not fully represent complex human tissue environments. Miniaturization may trade off gain and efficiency.
1：Experimental Design and Method Selection:
The antenna design utilizes a patch antenna with loading stubs and truncated corners for miniaturization and circular polarization. Simulations are conducted using HFSS software to analyze performance.
2：Sample Selection and Data Sources:
A one-layer human skin phantom model (100×100×100mm3 cube) is used to mimic the implantation environment, with the antenna implanted at a depth of 4mm.
3：List of Experimental Equipment and Materials:
The antenna is fabricated on a Rogers 3010 substrate with a thickness of
4：635mm, using a 50-ohm coaxial probe for feeding. Experimental Procedures and Operational Workflow:
The design involves optimizing parameters (e.g., stub lengths, truncated corner sizes) through simulations. Current distributions and gain are analyzed at different times to verify circular polarization and performance.
5：Data Analysis Methods:
Performance metrics such as impedance bandwidth, axial ratio bandwidth, and gain are evaluated from simulation results.
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