Modeling and Characterization of in-Body Antennas

Nikolayev, Denys

doi:10.1109/mmet.2018.8460279

Cited by 9 publications

(9 citation statements)

References 39 publications

(45 reference statements)

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“…3) Numerical Modeling: We used CST Microwave Studio 2018 to develop the antennas [39]. Detailed description of the numerical approach is given in [40], [41]. Intersubject body and organ morphologies can vary strongly, and, in general, the exact location of a capsule in living tissues varies with time.…”

Section: Antenna Designmentioning

confidence: 99%

Dielectric-Loaded Conformal Microstrip Antennas for Versatile In-Body Applications

Nikolayev

Joseph

Skrivervik

et al. 2019

Antennas Wirel. Propag. Lett.

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Wireless implantable bioelectronics and accurate in vivo characterization of path loss require efficient and robust in-body antennas. Loading electric antennas with the effective permittivities higher than that of surrounding tissues is a promising solution. In this study, proof-of-concept conformal microstrip antennas are proposed. The antennas are optimized for a standard impedance of 50 Ω and operate in all high-watercontents tissues. Integral ground plane shields the antenna from inner circuitry. The radiation efficiencies are 0.4%, 2.2%, and 1.2% for the (434, 868, and 1400)-MHz designs, respectively, when computed in a 100-mm spherical phantom with muscleequivalent properties. The efficiencies are compared to the fundamental limitations and closely approaches them. Specific absorption rates are evaluated, and the corresponding maximum input power levels are established. Prototypes are fabricated and characterized to validate the design.

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Section: Antenna Designmentioning

confidence: 99%

Dielectric-Loaded Conformal Microstrip Antennas for Versatile In-Body Applications

Nikolayev

Joseph

Skrivervik

et al. 2019

Antennas Wirel. Propag. Lett.

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“…Some recent uses of the VHP Female v3.0-5.0 computational human model have been documented in the literature -cf. for example [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31] -and compared with experimental data on radio frequency propagation. A number of studies have focused on the characteristics and behaviors of antennas near the human body [15][16][17][18][19][20][21][22][23].…”

Section: Vhp Female V 50 Anatomical Human Model (Doi 1020298/vhp-fema...mentioning

confidence: 99%

Computational Tool Comprising Visible Human Project® Based Anatomical Female CAD Model and Ansys HFSS/Mechanical® FEM Software for Temperature Rise Prediction Near an Orthopedic Femoral Nail Implant During a 1.5 T MRI Scan

Noetscher

Serano

Nazarian

et al. 2022

Brain and Human Body Modelling 2021

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This medical device development tool (MDDT) is categorized as a non-clinical assessment model (NAM). This MDDT is a computational modeling and simulation tool. It can predict heating of metallic orthopedic implants with the radio frequency (RF) electromagnetic fields in the magnetic resonance imaging (MRI) coils while targeting a mid-aged and elderly female population primarily affected by osteoporosis and the associated bone fracture.This MDDT uses a high resolution anatomical female CAD (computer aided design) model coupled with the proven multiphysics finite element method (FEM) software (Ansys Workbench) to simulate the complete MRI environment. The environment is consisting of a tuned MRI coil with the given output power, detailed heterogeneous human model within the coil at the given landmark and a properly embedded metallic implant within the anatomical model to compute the extent of heating generated around the implant.Specifically, this MDDT is the in silico analog of an MRI scan for an elderly female subject with a metallic orthopedic implant at 1.5 T in a full-body birdcage RF coil.

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“…The fact that the dielectric properties of the different body tissues are frequency dependent worsens the problem [226]. In addition, the biological tissues have the potential to vary the resonance frequency of the in-body antenna [232]. Keeping in view the already degraded performance of AoC in Si technologies, these problems impose the use of novel performance enhancement methods for the AoCs which must not cause an increase in the size and cost of the AoC.…”

Section: ) Challenges Few Guidelines For the Solutions And Future Directionsmentioning

confidence: 99%

“…• The need for dual-band AoCs: There is a dire need of a single antenna for both, the energy harvesting circuit and the data communication circuit for this application in order to ensure system's miniaturization [232]. This requires the antenna to be dual-band; one band for the energy harvesting function and other for the data transfer function.…”

Section: ) Challenges Few Guidelines For the Solutions And Future Directionsmentioning

confidence: 99%

The Potentials, Challenges, and Future Directions of On-Chip-Antennas for Emerging Wireless Applications—A Comprehensive Survey

et al. 2019

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The ever-growing demand for low power, high performance, cost-effective, low-profile, and highly integrated wireless systems for emerging applications has triggered the need for the enormous innovations in wireless transceiver systems, components, architectures and technologies. This is especially valid for the antenna which is an integral component of the wireless transceiver systems and contributes significantly in determining their overall performance. Antenna-on-Chip (AoC) is an alternative antenna technology, which has drawn a substantial attention in recent days because of its various benefits over off-chip antenna technology. A few of these benefits include miniaturization, low power, low cost, and high integration of the wireless modules. Motivated by these valuable advantages and to unveil the true potential of the AoCs, this article presents, for the first time, a comprehensive survey of the suitability, advantages, and challenges of the AoCs for the emerging wireless applications such as 5th generation (5G) Wireless Systems, Internet-of-Things (IoT) Wireless Devices and Systems, Wireless Sensor Networks (WSNs), Wireless Interconnects, Wireless Energy Transfer, Radio Frequency (RF) Energy Harvesting, Biomedical Implants, Unmanned Aerial Vehicles (UAVs), Autonomous vehicles, Innovative characterization methods for Integrated Circuits (ICs) and Antennas, and Smart City. In addition, this article presents the current stateof-the-art of the AoC's applications by classifying their applications in Millimeter-Wave (MM-Wave) band, Terahertz (THz) band, and low-frequency bands. The article also investigates and describes some useful methods for the mitigation of the challenges and issues posed by the emerging applications for the realization of the AoCs in a systematic manner. A concise description of the future directions of the AoCs with respect to each emerging application is also a part of this article. It is expected that this well-structured and organized survey will not only act as an excellent source of scholarship for the relevant research community, but also open up a world of novel research opportunities.

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Modeling and Characterization of in-Body Antennas

Cited by 9 publications

References 39 publications

Dielectric-Loaded Conformal Microstrip Antennas for Versatile In-Body Applications

Dielectric-Loaded Conformal Microstrip Antennas for Versatile In-Body Applications

Computational Tool Comprising Visible Human Project® Based Anatomical Female CAD Model and Ansys HFSS/Mechanical® FEM Software for Temperature Rise Prediction Near an Orthopedic Femoral Nail Implant During a 1.5 T MRI Scan

The Potentials, Challenges, and Future Directions of On-Chip-Antennas for Emerging Wireless Applications—A Comprehensive Survey

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