A5030882266- Wireless Body Area Networks
- Energy Harvesting in Wireless Networks
- Wireless Power Transfer Systems
- Antenna Design and Analysis
- Advanced MRI Techniques and Applications
- Microwave Engineering and Waveguides
- Atomic and Subatomic Physics Research
- Advanced NMR Techniques and Applications
- Microwave Imaging and Scattering Analysis
- Advanced Antenna and Metasurface Technologies
- Molecular Communication and Nanonetworks
- Millimeter-Wave Propagation and Modeling
- Electromagnetic Fields and Biological Effects
- Electromagnetic Simulation and Numerical Methods
- Ultrasound and Hyperthermia Applications
- Electromagnetic Scattering and Analysis
- Advanced Sensor and Energy Harvesting Materials
- Ultrasound Imaging and Elastography
- Antenna Design and Optimization
- Microwave and Dielectric Measurement Techniques
- Metamaterials and Metasurfaces Applications
- Neuroscience and Neural Engineering
- Advanced MIMO Systems Optimization
- Non-Invasive Vital Sign Monitoring
- Ergonomics and Musculoskeletal Disorders
Hanyang University
2018-2025
Pusan National University Yangsan Hospital
2023
University of Ulsan
2011-2017
University of Minnesota
2008-2013
Resonance Research (United States)
2011-2013
University of Minnesota Medical Center
2010
Twin Cities Orthopedics
2008
This communication proposes miniaturized implantable antenna systems for biomedical applications, specifically scalp implantation. The proposed designs exhibit dual-band characteristics on the industrial, scientific, and medical bands (i.e., 915 2450 MHz) with small volumes: 344 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sup> (System A) 406 B). Each system is integrated microelectronic components a battery. key feature of its volume...
In this communication, a multiband spiral-shaped implantable antenna for scalp implantation and leadless pacemaker systems is presented. The proposed has the following operational bands: medical implanted communication service (MICS) (402-405 MHz), industrial, scientific, (ISM) (433.1-434.8 MHz 2400-2483.5 midfield (1520-1693 MHz). recommended system consists of two devices: flat-type device capsule-type pacemaker. each device, integrated with controlling electronic components battery....
In this paper, a conformal wideband circularly polarized (CP) antenna is presented for endoscopic capsule application over the 915-MHz Industrial, Scientific, and Medical (902-928 MHz) band. The thickness of only 0.2 mm, which can be wrapped inside capsule's inner wall. By cutting meandered slots on patch, using open-end ground, utilizing two long arms, proposed obtains significant size reduction. form, volume measures 66.7 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML"...
This communication presents a miniaturized triple band implantable antenna system for multiple biotelemetry applications, which operates at the industrial, scientific, and medical (ISM) (902-928 MHz 2400-2483.5 MHz) midfield (1824-1980 MHz). These bands are intended function of data telemetry, wireless power transfer, saving. The recommended is comprised two devices, capsule type deep tissue implantation flat skin implantation. volume these devices 647 mm <sup...
Passive operation and battery-charging of deep-body implants can be insured through wireless power transfer (WPT) technologies. However, the efficiency (PTE) is constrained by device miniaturization implantation depth. This study proposes a complete WPT system consisting patterned transmitter (Tx), an efficient rectifier, antenna integrated with system. The Tx had size 6 cm × was optimized to focus on deep-tissue at 1470 MHz. voltage doubler MHz, small 5 mm 10 mm, exhibited high radio...
This article proposes an efficient and complete wireless power transfer (WPT) system (WPTS) for multipurpose biomedical implants. The WPTS is composed of a self-diplexing implantable antenna, rectifier, WPT transmitter (WPT Tx). proposed capable simultaneously transmitting recorded data recharging the batteries devices (so as to elongate implant life). Tx occupies dimensions 50 ×50 ×1.6 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sup>...
In this paper, a miniaturized novel-shape dual-band implantable antenna operating in the industrial, scientific, and medical bands (902-928 MHz 2.4-2.4835 GHz) is developed for battery-powered implants. The Rogers ULTRALAM (ε <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">r</sub> = 2.9 tanδ 0.0025) liquid crystalline polymer material with 0.1 mm thickness used as both substrate superstrate. By employing shorting strategy, flower-shape radiating...
In this letter, two skin-implantable biotelemetry devices are presented along with an antenna system that operates on five bands, including the Medical Implant Communication Service (MICS) (402-405 MHz) and Industrial, Scientific, (ISM) (433.1-434.8 MHz, 868.0-868.6 902-928 2400.0-2483.5 bands. A link budget analysis was used to configure algorithm for effective device operation. These contain space storage batteries, controlling electronics, bio-sensors, a planar inverted-F (PIFA), have...
Advancement in the technology of leadless cardiac pacemakers (LCPs) has led to ultracompact designs implantable antennas. In this study, a small-sized antenna for integration with an LCP, which can be operated industrial, scientific, and medical (ISM) band 2.4 GHz, is developed. The proposed was constructed spiral shape provide superior miniaturization, less sensitivity body tissue variation, low specific absorption rate (SAR) values, avoid fabrication complexities due its small size....
This communication presents a metamaterial (MTM)-loaded compact dual-band circularly polarized antenna system suitable for multiple bio-telemetric applications. The proposed operates in the industrial, scientific, and medical (ISM) bands with center frequencies: 915 MHz (902-928 MHz) 2450 (2400-2480 MHz). integration of an MTM structure epsilon-very-large property on superstrate layer produces significant gain enhancement strong circular polarization (CP) behavior at both operating...
In this communication, a biotelemetry device for scalp implantation is proposed with an ultraminiaturized and simple-structured implantable antenna that exhibits dual-band characteristics in the industrial, scientific, medical bands (915 MHz 2.45 GHz). The system incorporates two batteries microelectronic components total volume of 434.72 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sup> . recommended has reduced 9.8 (7 × 7 0.2 mm),...
In this article, the first-ever dual-circular-polarized wideband conformal endoscopic antenna is designed at medical implant communication service band (402 MHz) and industrial, scientific, bands (915 MHz 2.4 GHz). The proposed with a small footprint of 8 mm3 (32 mm × 10 0.025 mm) printed on flexible polyamide wrapped onto inner wall capsule to spare space for integrated components. For evaluation antenna's performance within full-package device, homogeneous muscle box realistic Duke human...
The integration of sub-6-GHz and millimeter-wave (mm-wave) bands has become an important issue for future fifth generation (5G) wireless communications owing to their large frequency ratios. This paper proposes a compact-size dual-function antenna operating at 3.5 GHz the mm-wave band (28 GHz) 5G mobile applications using reconfigurability technique. proposed comprises microstrip patch linked with meandered radiating structure through radio PIN diode achieve between two bands. A significant...
To maintain the compactness of future 5G smartphones, integration sub-6 GHz and millimeter-wave (mm-wave) bands is a challenging task due to large frequency ratio. We, therefore, propose single-fed triple-band antenna with The proposed composed microstrip patch radiator an inverted U-shaped slot for dual-band operation in mm-wave frequencies (28 38 GHz). A meandered radiating structure linked through compact resonant cell (CMRC) low-pass filter (LPF), which used these structures be operated...
This study proposes a miniaturized four-port multiple-input multiple-output (MIMO) implantable antenna for wireless capsule endoscopy (WCE). The proposed MIMO operates in the 2.45 GHz industrial, scientific, and medical (ISM) band, has compact size of <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$6.2\,\, \times 5.2\,\, 0.127~\text {mm}^{3}$ </tex-math></inline-formula> , comprises four meandered...
Compact implantable medical devices (IMDs) require miniaturized and multiband antennas to efficiently navigate space limitations diverse frequency demands in biomedical applications. This article proposes an ultra-miniaturized antenna featuring the smallest footprint with a volume of 0.7 mm3 exhibits quad-band characteristics: telemetry at 915 MHz, wireless power transfer midfield bands 1450 1900 control signaling 2450 MHz. Extensive simulation analyses were conducted for alone integrated...
Implantable antennas are integral but challenging components of wireless biomedical implants. They very sensitive to variations in host tissue environments and their performance is affected by coupling with circuitry other components. To overcome these issues, a small-sized ultrawideband antenna system stable impedance matching has been proposed. The suggested small volume 28.85 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sup>...
In this paper, a metamaterial-coupled, highly efficient, miniaturized, and long-range wireless power transfer (WPT) system based on cubic high-dielectric resonator (CHDR) is explored. The proposed WPT consists of two CHDR metamaterials separated by distance excited rectangular coils. Initially, analyzed considering the cube dielectric permittivity, ε,. = 1000, loss tangent, tanδ 0.00001. From Ansoft HFSS simulation, it observed that operates in hybrid resonance mode resonating as horizontal...
This study introduces a high-throughput, large-scale manufacturing method that uses aerosol jet 3D printing for fully printed stretchable, wireless electronics. A comprehensive of nanoink preparation and parameter optimization enables low-profile, multilayer high-performance, capacitance flow sensor. The core process involves direct, microstructured patterning biocompatible silver nanoparticles polyimide. optimized fabrication approach allows transfer highly conductive, patterned...
Monitoring of elevated intracranial pressure (ICP) is a lifesaving procedure. This article presents an ultrasmall batteryless implantable system for ICP monitoring comprising off-body power transmitter (Tx) and in-body biotelemetric receiver (Rx). Due to the small antenna (5.6 mm × 6 0.2 = 6.72 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sup> ), device exhibits dual-band characteristics (i.e., 915 1900 MHz) simultaneous transmission data...
This study proposes a miniaturized dual-band antenna with circular-polarization characteristic for wireless-capsule endoscopic system operating in the industrial, scientific, and medical bands: 915 2450 MHz. The proposed capsule device is intended deep-tissue implantation standard dimensions of 26×11 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> . key features are its CP at both bands, satisfactory gain values, smallest volume (...
In this study, an ultra–miniaturized implantable antenna based system with ultra-wideband characteristics in the industrial, scientific, and medical band (i.e., 2.4–2.48 GHz) is proposed for biomedical applications. A biocompatible flexible liquid crystalline polymer material, Rogers ULTRALAM (tan <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\delta =0.0025$ </tex-math></inline-formula>...
The detuning owing to the complex in-body operating scenarios, environmental factors, and circuitry of implantable medical devices (IMDs) are primary concerns in integrating antennas with their corresponding systems. wide bandwidth achievement for avoiding challenges is constrained by device specifications antenna miniaturization. This study presents an ultra-miniaturized only 10.66 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sup>...
Wireless power transfer (WPT) is a promising technology for enabling the long-term operation of advanced implantable medical devices (IMDs). This article presents highly efficient near-field WPT system wirelessly driven or rechargeable miniaturized IMDs, comprising an off-body transmitter (Tx), flexible on-body mu-negative (MNG) metasurface slab, and in-body receiver (Rx). The Rx element with dimensions 7.5 <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML"...