In Vivo Testing of Circularly Polarized Implantable Antennas in Rats

Liu, Changrong; Guo, Yong‐Xin; Jegadeesan, R.; Xiao, Shaoqiu

doi:10.1109/lawp.2014.2382559

Cited by 37 publications

(27 citation statements)

References 11 publications

(20 reference statements)

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“…In [12], a conformal miniaturized multilayered spiral antenna is designed for the subcutaneous implantation to have dual-band operation in MedRadio and ISM bands. A compact, probe-fed, broadband implantable antenna based on the patch geometry is also designed for single ISM band biomedical telemetry applications with the circular polarization capability [8], [13]. In [7], an Egret-Beak shaped patch with the shorting pin connected from the radiating patch to the ground plane is designed for the triband operation in MICS, wireless medical telemetry service (WMTS) and ISM bands in wireless medical telemetry applications.…”

Section: Introductionmentioning

confidence: 99%

Compact Bioimplantable MICS and ISM Band Antenna Design for Wireless Biotelemetry Applications

Palandöken¹

2017

RADIOENGINEERING

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Section: Introductionmentioning

confidence: 99%

Compact Bioimplantable MICS and ISM Band Antenna Design for Wireless Biotelemetry Applications

Palandöken¹

2017

RADIOENGINEERING

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“…At frequencies above 1100 MHz, measured |S 11 | is higher than simulation. The disagreement may be caused by the air gap between the antenna and meat mince [6]. The measured bandwidth of the MD loaded HCCPW antenna is 810-1062 MHz.…”

Section: Measurement and Discussionmentioning

confidence: 99%

Design of an Implantable Antenna Operating at Ism Band Using Magneto-Dielectric Material

Luan¹,

Liu²,

Zong³

et al. 2019

PIER Letters

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A novel technique to design a wideband implantable antenna has been proposed by using magneto-dielectric material. The antenna is a half cutting of a coplanar waveguide fed antenna with symmetric geometry printed on a flexible substrate with 24 µm thickness. A piece of magneto-dielectric sheet with 0.25 mm thickness is attached on the bottom layer of the antenna to tune the antenna bandwidth. The antenna is simulated in a one-layer body phantom. Simulation shows that the antenna has a wide bandwidth covering 902-928 MHz Industrial, Scientific, and Medical (ISM) band when the body phantom is filled with muscle. There are frequency bandwidth shifts when the body phantom is filled with different tissues of skin, small intestine, and stomach, respectively. The antenna has wide bandwidth covering ISM band in these tissues. Measurement has been done in meat mince. The measured bandwidth of proposed antenna is 810-1062 MHz. The proposed antenna has a compact size of 4 mm × 12 mm × 0.274 mm suitable to be applied in capsule endoscope, wireless pacemaker, etc. 1. INTRODUCTION Implantable biomedical devices using wireless communication have attracted much research interest in medical area due to virtues of live signal transmission and less pain to patient. These devices include wireless capsule endoscope, wireless cardiac pacemaker, glucose monitoring system, neural recording system, etc. [1-5]. Implantable antenna is an important component of an implantable wireless biomedical device to transfer data between inner body and outside body. Implantable antennas are required with miniaturized volume to reduce the physical uncomfortableness caused by the implantation inside body. The size of an ordinary antenna is inversely proportional to its working frequency. The popularly used frequency bands of implantable devices include Industrial, Scientific, and Medical (ISM, 433.05-434.79 MHz, 902-928 MHz, and 2.4-2.4835 GHz) bands, Medical Implant Communication Services (MICS, 402-405 MHz), Ultra-Wideband (UWB, 3.1-10.6 GHz)). It is easy to design a small antenna at UWB and ISM 2.4 GHz bands. However, the human body would absorb more energy with increase of frequency when electromagnetic waves propagate inside human body. Bands of ISM 2.4 and UWB with higher frequency are difficult to transfer high quality signals. Lower bands of ISM 433 MHz and MICS with narrow frequency bands of 1.74 MHz and 3 MHz, respectively, are difficult to obtain high data rate. Therefore, ISM 902-928 MHz band is a promising band to transfer high data rate signal for implantable devises [1, 3]. Many research works have been done on compact implantable antenna design [1, 2, 4-12]. Conventional miniaturization techniques are adopted including etching slots on patch [2, 4, 5], using multiple layer stacked structure [6, 7], and meandering strip/line in folded or helical shape [1, 4, 5, 8-12]. Dielectric, magnetic, and magneto-dielectric (MD) materials with high permittivity or permeability are also used as substrates to obtain antenna size reduction [13, 14].

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“…Antennas play key role in information transmission right from very small antennas of pill size to very big antennas of room size. Miniatured [18][19][20] antennas of very small size antennas are supposed to provide various advantages like easy to swallow and operability, within the body without external connections, and they can also be surgically implanted to monitor specific body functions externally. The life cycles of various plants and animals are being studied from various on board satellites.…”

Section: Bio-medical Antennasmentioning

confidence: 99%

Re cent Trends i n Bio M edical Textile Antennas

Suneetha*,

Sridevi*

2020

IJITEE

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It is aimed to provide an insight on microstrip patch antenna in biomedical applications, the challenges and to discuss the procedure in the way they are dealt so far, in the literature. Microstrip patch antenna gained considerable scientific interest because of its integration with textiles, body mounted applications and medical implants. The ease of integration, confirmability, planar structure, miniaturization, patient safety and biocompatibility make pondering conclusion of intriguing mathematical and experimental paradigm. Simulation tools like HFSS, CST Microwave Studio etc., are being used and the antenna is fabricated after getting satisfactory results. The fabricated antenna is tested under various bio-medical, environmental and mechanical stress and strain conditions. The challenges along with some remedial solution are being discussed with envision to achieve painless, uncomplicated, trustworthy diagnosis and treatment.

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In Vivo Testing of Circularly Polarized Implantable Antennas in Rats

Cited by 37 publications

References 11 publications

Compact Bioimplantable MICS and ISM Band Antenna Design for Wireless Biotelemetry Applications

Compact Bioimplantable MICS and ISM Band Antenna Design for Wireless Biotelemetry Applications

Design of an Implantable Antenna Operating at Ism Band Using Magneto-Dielectric Material

Re cent Trends i n Bio M edical Textile Antennas

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