A Dual-Band HF and UHF Antenna System for Implanted Neural Recording and Stimulation Devices

Sharma, Apoorva; Kampianakis, Eleftherios; Reynolds, Matthew S.

doi:10.1109/lawp.2016.2585650

Cited by 51 publications

(15 citation statements)

References 9 publications

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“…frequencies [10], [11] and now there are many commercial solutions available [12]. This interest in RF-based implant communication led to the establishment of the medical implant communication services (MICS) band at 402-405 MHz [5], [13]. More recently, researchers have also been considering the use of the industrial, scientific and medical (ISM) band at 2360-2483.5 MHz due to the ease of antenna design, particularly since WIMD applications are demanding much smaller device dimensions [14].…”

Section: Introductionmentioning

confidence: 99%

Assessing the Intrinsic Radiation Efficiency of Tissue-Implanted UHF Antennas

El-Saboni

Zelenchuk

Conway

et al. 2020

IEEE Trans. Antennas Propagat.

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Dielectric loss occurring in tissues in close proximity to UHF implanted antennas is an important factor in the performance of medical implant communication systems. Common practice in numerical analysis and testing is to utilize radiation efficiency measures external to the tissue phantom employed. This approach means that radiation efficiency is also dependent on the phantom used and antenna positioning, making it difficult to understand antenna performance and minimize near-field tissue losses. Therefore, an alternative methodology for determining the intrinsic radiation performance of implanted antennas that focuses on assessing structural and near field tissue losses is presented. The new method is independent of the tissue phantom employed and can be used for quantitative comparison of designs across different studies. The intrinsic radiation efficiency of an implant antenna is determined by assessing the power flow within the tissue phantom at a distance of at least λg/2 from the radiating structure. Simulated results are presented for canonical antennas at 403 MHz and 2400 MHz in homogeneous muscle and fat phantoms. These illustrate the dominance of propagating path losses in high-water content tissues such as muscle, whereas nearfield dielectric losses may be more important in low-water tissues such as fat due to the extended reactive near-field.

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Section: Introductionmentioning

confidence: 99%

Assessing the Intrinsic Radiation Efficiency of Tissue-Implanted UHF Antennas

El-Saboni

Zelenchuk

Conway

et al. 2020

IEEE Trans. Antennas Propagat.

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“…A coplanar waveguide fed ring strip with stubs are proposed for UWB operation [11]. Biomedical implantable antenna for stimulation and neural signal recording devices is presented in [12] for providing power supply by inductive coupling. A printed circuit board based metal frame antenna [13] is proposed for health monitoring with wrist band wearable devices.…”

Section: Introductionmentioning

confidence: 99%

Dual Band Wearable Antenna for IOT Applications

Kumar*¹,

Mathur²

2019

IJITEE

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A dual band wearable antenna operating on 2.6 GHz (2570-2620 MHz FDD/TDD) and 5.2 GHz (802.11a) bands for Body Area Network (BAN) application is presented. The stack substrates of Felt and ethylene-vinyl acetate (EVA) foam are used to make the structure flexible. Maximum gain of 2.75 and front to back ratio of 8.35 is achieved on industrial scientific and medical (ISM) band. Additional bandwidth enhancement has been achieved by creating slots on partial ground plane. The calculated specific absorption rate (SAR) value is 1.33 W/kg for 1 g of body tissue. Simulated and measured results are presented for the proposed structure.

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“…As another antenna structure used for power and signal transmission in the MHz band, the inductive coupling coil can easily realize the planar antenna structure and multiple resonant frequencies [7,8,9,10]. In our previous study [9,10], the authors designed and fabricated planar-structured dual-band and triband coil receiving antennas for WCE signal reception in the 10-60 MHz band, and a single-band transmitting antenna for communication performance evaluation.…”

Section: Introductionmentioning

confidence: 99%

Single-coil dual-band antenna design for wireless capsule endoscopic communication in MHz band

2019

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Inductive coupled coil is an antenna structure that can easily realize multiple resonant frequencies with planar structure for MHz band wireless capsule endoscopic (WCE) communication. However, since one resonant frequency is generated by one coil, the antenna size is large when designing multi-band antennas. In this paper, the antenna matching circuit is modified to be a series circuit with an LC tank so that one coil can generate two resonant frequencies. For the receiving antenna, this improvement can reduce half the number of coils and achieve smaller antenna size. For the transmitting antenna that is difficult to use multiple coils due to the strict size constraints of the WCE, this improvement can achieve two resonant frequencies through one coil. In order to evaluate the feasibility and whether this improvement will reduce the antenna transmission performance, a single-coil dual-band antenna operating in the MHz band is designed and manufactured, and the simulated and measured reflection and transmission coefficients are evaluated by a biological tissue equivalent phantom. By comparing with the previously proposed antenna results, it can be known that the transmission performance is not deteriorated, indicating that the improvement is feasible for the WCE transmitting and receiving coil antennas.

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A Dual-Band HF and UHF Antenna System for Implanted Neural Recording and Stimulation Devices

Cited by 51 publications

References 9 publications

Assessing the Intrinsic Radiation Efficiency of Tissue-Implanted UHF Antennas

Assessing the Intrinsic Radiation Efficiency of Tissue-Implanted UHF Antennas

Dual Band Wearable Antenna for IOT Applications

Single-coil dual-band antenna design for wireless capsule endoscopic communication in MHz band

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