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Updated: May 30, 2025

Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials
Published on: September 26, 2014
Circularly polarized dual-band resonance in a miniaturized implantable antenna using combined hexagonal and rhombic
Shanmugam Kumaravel1, Madurakavi Karthikeyan2
1Department of Communication Engineering, School of Electronics Engineering, Vellore Institute of Technology, Vellore, Tamil Nadu, India.
Abstract:
The design and characterisation of a novel dual-band implantable antenna with compact size is presented in this research. The antenna, which is [Formula: see text] in size and operates at two critical frequencies-0.954 GHz in the UHF band and 2.4 GHz in the ISM band-was fabricated on an RT6010 substrate. The U-shaped slot and shorting pin on the radiating element have been exploited to achieved dual-band and circular polarization. The antenna is noteworthy for achieving circular polarization with a broad axial ratio bandwidth of 24.6%, which enables strong performance throughout its operating frequencies. The proposed antennas SAR values satisfy IEEE safety standards for implantable medical devices with a gain of - 28.1 dB at 2.4 GHz and - 31.2 dB at 0.954 GHz, despite its small size. The design represents a significant advancement in the field of medical implant technology since it prioritizes effective wireless communication capabilities while upholding strict safety regulations.
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