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>...

Design of a compact wideband circularly polarized (CP) multiple-input multiple-output (MIMO) antenna with polarization diversity is proposed and characterized for off-body communication. The based on simple coplanar waveguide (CPW)-fed monopole extension the microstrip line. orthogonal field components required by CP are induced using simply modified right/left side ground plane. In particular, stub extending from plane along length line generates vertical component, whereas current width...

This article presents a novel compact dual-element capsule endoscopic multiple-input-multiple-output (MIMO) antenna at 915 MHz industrial, scientific, and medical (ISM) band. Both radiating elements of the MIMO system are circularly polarized (CP) desired frequency band (915 MHz). In fact, Antenna- 1 operates left-handed CP (LHCP) 2 right-handed (RHCP), enabling polarization diversity MHz. Moreover, radiate in two opposite directions; thus, they enable pattern diversity. The performance...

This article presents a low-profile multiple-input–multiple-output (MIMO) implantable antenna system, including capsule endoscopy and scalp implantation at medical implant communication service (MICS) band (402–405 MHz), industrial, scientific, (ISM) (433.1–438.8 MHz). It consists of two elements with an edge-to-edge gap <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$0.0018\lambda _{g}$...

A quad-element multiple-input–multiple-output (MIMO) antenna is designed at 433 MHz industrial, scientific, and medical (ISM) band, to increase the transmission data-rate minimize multipath fading. The proposed MIMO consists of semicircular meandered radiators with a shared ground. It optimized inside an implantable device in human head model. antenna’s results show 10 dB fractional bandwidth 38.26% (355–523 MHz) peak realized gain −28.3 dBi. high isolation ( <inline-formula...

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>...

This letter presents the design of a single point-fed, geometrically simple circularly polarized (CP) antenna for 28 GHz Ka-band applications. The proposed is based on straight microstrip line printed one side and coupled with nearly square patches through 45° inclined V-shaped slot aperture other side. In order to generate circular polarization, fundamental radiating mode degenerated at slightly different frequency by aligning patch edges parallel each arm V-slot orthogonal arms....

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>...

A new flexible circularly polarized (CP) wearable antenna is proposed for Wireless Body-Area Network systems (WBAN) operating at 5.8 GHz. The circular polarization enabled by combining a microstrip-line monopole feed and an inverted L-shaped conformal metal strip extended from coplanar waveguide. shows satisfactory performance in terms of gain specific absorption rate (SAR) separation 12 mm human body model. To minimize body-antenna separation, <inline-formula...

A compact multiple-input–multiple-output (MIMO) implantable antenna is proposed in this article for deep-implanted medical devices. The suggested enables high-data-rate telemetry as well sensing the inner conditions of tissues. It consists two semicirc- ular patches that are excited with coaxial cables. miniaturization design achieved using multiple slots patches, shorting pins, and high-permittivity substrate. Consequently, maintains a dimensions <inline-formula...

Multiple input multiple output-ultrawide band (MIMO-UWB) systems are experimentally evaluated for underground mine high-speed radio communications. Measurement campaigns using two different antenna configurations have been made in an gold mine. Furthermore, scenarios, which the line of sight (LoS) and non-LoS (NLoS), i.e., taking into account mining machinery effect, distinguished studied separately. In fact, channel is characterized terms coherence bandwidth, path loss, shadowing,...

This letter presents a geometrically simple and compact circularly polarized antenna with unidirectional radiation characteristics for off-body communications. The proposed is based on microstrip-line monopole extension from coplanar waveguide protruded stub one side of the ground plane along length monopole. orthogonal components equal amplitudes required circular polarization are induced using vertical horizontal edge plane. To control towards human body, flexible, high-permittivity...

The ever-growing demand for low power, high performance, cost-effective, low-profile, and highly integrated wireless systems emerging applications has triggered the need enormous innovations in transceiver systems, components, architectures technologies. This is especially valid antenna which an integral component of contributes significantly determining their overall performance. Antenna-on-Chip (AoC) alternative technology, drawn a substantial attention recent days because its various...

This study presents a multi-band conformal antenna based endoscopic system for robust biotelemetry communications, which covers five important bands, including the MedRadio (401–406 MHz), Industrial, Scientific, and Medical (ISM) (433.1–434.8 MHz, 868–868.6 902–928 midfield (1200 MHz) bands. These bands are intended functions such as biotelemetry, power saving, wireless transfer (WPT). The proposed is printed on flexible material Rogers ULTRALAM with thickness of only 0.1 mm, can be easily...

This letter proposes a low-profile substrate integrated waveguide (SIW) cavity backed self-quadruplexing antenna for wearable transceivers. The full-mode circular SIW is split into four unequal quarter-mode (QMSIW) cavities using the two slots on upper layer of cavity. proposed uses C-shaped and arc-shaped different dimensions in each QMSIW resonator to operate at wireless local area network bands (3.5, 4.9, 5.4, 5.8 GHz). measured gains are 4.4, 5.07, 5.40, 5.7 dBi 3.5, GHz, respectively....

In this article, a four-element circularly polarized series-slot-fed multiple-input-multiple-output (MIMO) antenna array with circular polarization (CP) diversity is presented. The proposed design utilizes combination of 45° inclined slots and straight microstrip line feeding technique. two antennas are designed to operate the opposite sense CP. CP achieved by placing patch just about square dimensions on top V-slot orthogonal but unequal arms. arm slot degenerates fundamental mode at...

This paper presents a compact self-quadruplexing antenna for scalp-implantable devices. The proposed operates at 168 MHz [Industrial, Scientific, and Medical (ISM) band], 433 (ISM band), 915 1400 [Wireless Telemetry Service (WMTS) band] when Port 1, 2, 3, 4 are activated, respectively. is simulated inside rectangular device in the head of human phantom. suggested comprises four individually excited semi-circular meandered resonators with common ground plane. compactness design achieved by...

This study introduces a small dual-band implantable antenna designed for wireless capsule endoscopy (WCE). operates in the Wireless Medical Telemetry Service (WMTS) 1.4 GHz as well Industrial, Scientific, and (ISM) 2.45 bands. The achieves miniaturization by employing open-ended slots, shorting pins, arc-shaped slots on radiating patch. final structure 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...

The performance of multiple-input-multiple-output (MIMO) system operating at the 60 GHz band is investigated based on experimental data in a real underground mine gallery. However, millimeter wave (mmW) channels face some challenges such as high propagation loss. In order to overcome this issue, planar microstrip antenna array has been designed, and fabricated. Moreover, effect miners' activity vicinity short-range wireless link studied. Statistical parameters channel, RMS delay spread, path...

Design of compact wideband circularly polarized (CP) antennas is challenging due to the necessity simultaneous handling several characteristics [reflection, axial ratio (AR), and gain] while maintaining a small size structure. Antenna redesign for various operating bands clearly more difficult yet practically important because intentional reduction bandwidth (e.g., by moving lower edge band up in frequency) may lead considerable reduction, which can be beneficial specific application areas....

In this article, a novel design of dielectric resonator antenna (DRA) with reconfigurable radiation pattern capability is presented. Reconfigurability in the azimuth plane achieved by symmetrically placing six electromagnetic bandgap (EBG) sectors around DRA. Each sector composed 26 circular-shaped mushroom-like EBG unit cell. order to achieve 360° reconfigurability minimum number diodes, network metallic veins printed on conductor-backed slab used group and connect vias each sector....

In this study, a coplanar waveguide‐fed reconfigurable antenna using crescent‐shaped fractal geometry is presented. The frequency approach obtained radio‐frequency positive intrinsic negative diodes, resistor, and inductors. proposed has successfully allowed switching up to eight bands between 1.46 6.15 GHz. Good results have been in terms of stable omnidirectional radiation patterns. realised gains the system, these bands, vary from 0.52 5.67 dBi. designed advantages multiband structure...