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[IEEE 2018 International Conference on Microwave and Millimeter Wave Technology (ICMMT) - Chengdu, China (2018.5.7-2018.5.11)] 2018 International Conference on Microwave and Millimeter Wave Technology (ICMMT) - A Compact Circularly Polarized Implantable Antenna for Wireless Medical Telemetry
摘要： A novel miniaturized circularly polarized (CP) patch antenna operating at 915MHz ISM band is designed in this work for wireless biomedical communication. By taking advantage of loading stubs, the proposed antenna features a good miniaturization with the compact size of 13.88×13.88×1.27mm3. A pair of truncated corners in diagonal directions of the planar patch are used for the generation of circular polarization. The simulated 3-dB axial-ratio(AR) bandwidths of around 16MHz is achieved for the proposed antenna, while the impedance bandwidth is 47MHz for |S11| less than -10 dB.
关键词： miniaturization,Circularly polarized (CP),implantable antenna
更新于2025-09-23 15:23:52
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[IEEE 2019 International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM) - Qingdao, China (2019.9.18-2019.9.20)] 2019 International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM) - A Miniaturized Coplanar Waveguide-fed Antenna for Implantable Application at ISM Band
摘要： This paper proposes a novel implantable antenna design for biomedical applications. The antenna is designed to operate at 2.45 GHz, which is a common frequency for biomedical telemetry. The proposed antenna has a small size of 10 mm × 10 mm × 1.27 mm and is printed on a Rogers RO3210 substrate. The antenna is fed by a 50 Ω coaxial probe and is designed to be implanted in the human body. The performance of the antenna is evaluated in terms of return loss, radiation pattern, and specific absorption rate (SAR). The results show that the proposed antenna has a good impedance matching and radiation performance, and the SAR values are within the safety limits.
关键词： Specific absorption rate,Implantable antenna,Rogers RO3210,Biomedical telemetry,2.45 GHz
更新于2025-09-16 10:30:52
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An Implantable Wideband Circularly Polarized Microstrip Patch Antenna via Two Pairs of Degenerate Modes
摘要： This paper presents a design approach to developing a wideband circularly polarized (CP) microstrip patch antenna (MPA) embedded in the human body. To achieve this goal, a pair of high-order degenerate modes (TM30 and TM03) in MPA have been excited and lowered for resonance in proximity to a pair of fundamental degenerate modes (TM10 and TM01). The proper disturbance of these two pairs of radiative resonant modes can contribute to the generation of two CP radiating waves at two near-by operating frequencies, aiming to realize CP radiation in a wide operating band covered by these two frequencies. A novel implantable wideband CP MPA is proposed and developed due to the emergence of two minima in the axial-ratio (AR) frequency response. The designed MPA is then demonstrated to tremendously achieve the wide 3-dB AR bandwidth which covers the 2.4 to 2.48 GHz ISM-band in the cubic human skin model. Moreover, the proposed CP MPA shows good tolerance to the variety of tissue according to our study on sensitivity and model integrity. Finally, the designed CP MPA is fabricated and tested, and a good agreement exists between measured and simulated results in a wide frequency region.
关键词： Implantable Antenna,Lower and Upper Degenerate Modes,Wide Bandwidth,Circular Polarization
更新于2025-09-04 15:30:14