Implantable Antennas for Bio-Medical Applications

Malik, Nabeel Ahmed; Sant, Paul; Ajmal, Tahmina; Ur-Rehman, Masood

doi:10.1109/jerm.2020.3026588

Cited by 70 publications

(27 citation statements)

References 84 publications

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“…Unlike others, it contains the nearest object around the human body, which may also be a part of the human body [5][6][7]. In this communication process, an implantable antenna plays a significant role in transmitting data [8][9][10]. For implantable antennas, many scholars have carried out researches in different directions to solve different problems.…”

Section: Introductionmentioning

confidence: 99%

A Miniaturized Dual-Band Circularly Polarized Implantable Antenna by Half-Cutting

Yin¹,

Ye²,

Cong³

et al. 2022

PIER M

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In this paper, a miniaturized dual-band circularly polarized (CP) implantable antenna is proposed. The −10 dB impedance bandwidth of the antenna in Industrial Scientific Medical (ISM) band and the low frequency part of UWB can reach 30.3% (2.02 ∼ 2.74 GHz) and 39.9% (3.73 ∼ 5.59 GHz), respectively. The important features are its CP characteristic in two bands and a small volume. The miniaturization of the antenna is realized by half-cutting technique, which is to cut the original antenna meeting the symmetry of structure and electric field distribution into two halves to obtain a compact structure and wider impedance bandwidth, so that the final size is 5 × 10.4 × 0.254 mm 3 . The CP wave performance of the antenna is achieved by exciting orthogonal polarization components on the radiation surface. The proposed antenna provides an axial ratio of less than 3 dB. CP axial ratio bandwidths in the two bands are 24.4% and 18.1%, respectively. In addition, the safety considerations and link margin are evaluated to analyze the performance of the proposed antenna. In order to verify the simulation results, the proposed antenna is fabricated. The measurements are carried out under the human muscle mimicking liquid circumstances. The measured data are in good agreement with the simulation results.

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Section: Introductionmentioning

confidence: 99%

A Miniaturized Dual-Band Circularly Polarized Implantable Antenna by Half-Cutting

Yin¹,

Ye²,

Cong³

et al. 2022

PIER M

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show abstract

“…A conventional WCE contains battery, LED, camera, image sensor, and wireless transmission module [2]. The wireless transmission module is mainly composed of a capsule antenna [3]. Capsule antenna, which used to transmit date, is one of the key devices of WCE.…”

Section: Introductionmentioning

confidence: 99%

A Dual-Band Ultra-Wideband Conformal Antenna for Wce

Ran¹,

Ye²,

Yin³

2022

PIER M

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In this paper, a dual-band ultra-wideband conformal antenna for Wireless Capsule Endoscopy is proposed. The antenna uses polyimide as a substrate of side wall to achieve conformality, leaving space for other components of the Wireless Capsule Endoscopy. The feeding network of the conformal antenna utilizes the circuit characteristics of Complementary Split-Ring Resonator to achieve dual-band operation at 1.4 GHz and 4.0 GHz. Based on the principle of wideband characteristics of spiral antennas, the conformal antenna radiation structure is improved. A short-pin is loaded at an appropriate position to improve the impedance matching of the antenna and achieve ultra-wideband without changing the resonant points of the antenna. The operating bandwidth of the antenna can reach 30.3% (1.20 ∼ 1.63 GHz) and 53.3% (3.33 ∼ 5.75 GHz), respectively. In addition, the antenna is placed in different simulation models to verify the stability of its operation. Minced pork is used to verify effectiveness of the conformal antenna. The measured results show that the proposed antenna is suitable for capsule endoscopy.

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“…[ 58–60 ] Telemetry with an implantable device is particularly challenging and distinguished from conventional wireless communication because both size and the power consumption of the implantable device are severely restricted. [ 61–63 ] However, the requirement for an accurate data rate is relatively low because biological data of interest are often simple and change slowly. Various methods related to RF‐based telemetry have been investigated and proposed to address these conditions.…”

Section: Introductionmentioning

confidence: 99%

Wireless Power Transfer and Telemetry for Implantable Bioelectronics

Yoo

Lee

Joo

et al. 2021

Adv Healthcare Materials

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Implantable bioelectronic devices are becoming useful and prospective solutions for various diseases owing to their ability to monitor or manipulate body functions. However, conventional implantable devices (e.g., pacemaker and neurostimulator) are still bulky and rigid, which is mostly due to the energy storage component. In addition to mechanical mismatch between the bulky and rigid implantable device and the soft human tissue, another significant drawback is that the entire device should be surgically replaced once the initially stored energy is exhausted. Besides, retrieving physiological information across a closed epidermis is a tricky procedure. However, wireless interfaces for power and data transfer utilizing radio frequency (RF) microwave offer a promising solution for resolving such issues. While the RF interfacing devices for power and data transfer are extensively investigated and developed using conventional electronics, their application to implantable bioelectronics is still a challenge owing to the constraints and requirements of in vivo environments, such as mechanical softness, small module size, tissue attenuation, and biocompatibility. This work elucidates the recent advances in RF‐based power transfer and telemetry for implantable bioelectronics to tackle such challenges.

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Implantable Antennas for Bio-Medical Applications

Cited by 70 publications

References 84 publications

A Miniaturized Dual-Band Circularly Polarized Implantable Antenna by Half-Cutting

A Miniaturized Dual-Band Circularly Polarized Implantable Antenna by Half-Cutting

A Dual-Band Ultra-Wideband Conformal Antenna for Wce

Wireless Power Transfer and Telemetry for Implantable Bioelectronics

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