Abdul Basir

Passive operation and battery-charging of deep-body implants can be insured through wireless power transfer (WPT) technologies. However, the power transfer efficiency (PTE) is constrained by device miniaturization and implantation depth. This study proposes a complete WPT system consisting of a patterned WPT transmitter (Tx), an efficient rectifier, and an antenna integrated with the system. The WPT Tx had a size of 6 cm × 6 cm and was optimized to focus the power on the deep-tissue implants at

In this article, the first-ever dual-circular-polarized wideband conformal endoscopic antenna is designed at the medical implant communication service band (402 MHz) and industrial, scientific, and medical bands (915 MHz and 2.4 GHz). The proposed antenna with a small footprint of 8 mm3 (32 mm × 10 mm × 0.025 mm) is printed on flexible polyamide and wrapped onto the inner wall of the capsule to spare the space for the capsule integrated components. For evaluation of the antenna's performance wit

Implantable antennas are integral but challenging components of wireless biomedical implants. They are very sensitive to variations in host tissue environments and their performance is affected by coupling with circuitry and other components. To overcome these issues, a small-sized ultrawideband antenna system with stable impedance matching has been proposed. The suggested antenna has a small volume of 28.85 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/19

Abstract This letter presents the design of a miniaturized dual‐band spiral antenna for biomedical applications. The recommended antenna covers both the Medical Implant Communication Service MICS (402‐405 MHz) as well as the Industrial Scientific Medical ISM (2.4‐2.48 GHz) band. Different size reduction techniques have been applied to downsize the antenna and the latter achieved a compact size of 14 × 17 × 0.25 mm 3 . For validation purpose, measurements were conducted in the saline solution hav

This communication presents a compact and flexible folded dipole antenna with stable and wide-bandwidth characteristics for the application of an intraoral tongue-drive system (iTDS) designed for use by people with severe disabilities. The proposed antenna, with an exceptionally small size of 20 mm × 4.4 mm × 0.025 mm, was designed to overcome the challenges of space-suitability and detuning that occur due to the variable conditions of the oral environment of the mouth by providing stable and wi

Positional misalignments of coils cause a sharp drop in the power transfer efficiency (PTE) of wireless power transfer (WPT) systems. To minimize this deterioration of the PTE, this study introduces a sphere-shaped (Rxs) to a three-coil magnetic resonance-coupled WPT system for implantable devices. To assess the significance of Rxs, its performance was compared to the well-known circular planar (Rxf), half-sphere-shaped (Rxhs), and solenoid (Rsl) coils. Moreover, a small and efficient voltage do

This article for the “Bioelectromagnetics” column takes a deep dive into the field of wireless implants and ingestibles, with a focus on antenna design. The review discusses recent advances in implantable/ingestible antenna design, provides a protocol for the successful design of such antennas, and concludes with an overview of the wide range of real-world applications that may benefit from this research area.

This study proposes a wireless power transfer (WPT) system consisting of a patterned WPT transmitter (Tx), an efficient voltage doubler, and an antenna integrated with the system. The WPT Tx had a size of 6 cm × 6 × cm and was optimized to focus the power on the deep-tissue implants at 1470 MHz. The voltage doubler was optimized at 1470 MHz, had a small size of 5 mm × 10 mm, and exhibited high RF-to-DC conversion efficiency of 80% at 2 dBm RF input power. Moreover, the implantable antenna occupi