A low-profile flexible planar monopole antenna for biomedical applications (original) (raw)
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Antenna design and fabrication for biotelemetry applications
International Journal of Electrical and Computer Engineering (IJECE), 2021
This research work assumes the role of designing a Micro-strip patch antenna that exists within the band range of 402 MHz to 405 MHz, which was considered as medical implantable communication systems (MICS) band and can be possibly implanted at human body phantom model because of its flexibility and lower radiation characteristics. CST microwave studio was used for designing the patch antenna and the human body phantom model with the existence of homogeneous layers (fat, skin and muscle) and the final version was fabricated. Being highly flexible, FR4 was chosen as a substrate to maintain 0.5 mm thickness throughout. For the ground and patch, copper material was selected having thickness of 0.018 mm. For the ease of fabrication and biocompatibility, silicon was selected with the thickness of being 8 mm. Maximum specific absorption rate of the proposed antenna was obtained 0.588 W/Kg for 10 g tissue. Various Parameters such as VSWR, S11, Radiation efficiency, Total efficiency were found 1.1889,-21.28 dB,-45.71 dB,-45.74 dB respectively inside body phantom that ensure the antenna design was efficiently and effectively suitable for biotelemetry system which is body implantable. After fabrication the value of S11 is found-12.43 dB in open space with 453 MHz frequency.
Study and design of a patch antenna for biomedical applications
ITM Web of Conferences
This work presents the performance of a Dual-band patch antenna with L-shaped slot for biomedical applications. The antenna works at 2.4 GHz and 3.33 GHz. A semi-flexible substrate material which is “Taconic TLX (tm)” with a relative dielectric constant, ℇr of 2.55, loss tangent, tan δ of 0.0019 and thickness, h of 0.7 mm has been proposed to be the isolant element of the antenna. The size of the antenna is 60 x 55 mm². The slots in the rectangular radiating patch were introduced to produce the resonant frequencies of 2.4GHz and 3.33GHz. The simulations of the microstrip patch antenna shows the reflection coefficient, S11 of -31.67 dB and -20.25 dB at 2.4 GHz and 3.27 GHz respectively. The proposed antenna shows a peak gain of 5.01 dB at 2.4 GHz. The results were obtained using HFSS (high frequency structured simulator) software.
A Novel Design and Performance Analysis of an ISM Band Antenna for Biomedical Applications
AIUB Journal of Science and Engineering (AJSE), 2018
Biomedical application is an advancing sector of research work which permits the development of a transmission link from a living body to an extrinsic device. A microstrip patch antenna is proposed in this paper for biomedical applications. The antenna is designed to operate in the Industrial, Scientific and Medical (ISM) band (2.4 – 2.4835 GHz). The thickness of the antenna is only 2.3 mm which implies that the antenna is reliable to operate under bent conditions. The dimension of the proposed antenna is 28.5 mm x 28.5 mm x 2.3 mm. In this antenna, Copper is used as the patch material and FR-4 is used as the substrate material. Three-layer human tissue model is used to analysis the performance of the antenna. Computer Simulation Technology (CST) software is used to designed the antenna and analysis the performance parameter of the antenna such as the return loss (S11 parameter), radiation pattern, operating frequency, directivity, gain, total efficiency under normal and bent condit...
New Flexible Medical Compact Antenna: Design and Analysis
International Journal of Antennas and Propagation, 2012
Some results on embedded antennas for medical wireless communication systems are presented. Medical telemetry can advantageously assist medical diagnostics. For example, you can better locate a diseased area by monitoring temperature inside the human body. In order to establish efficient wireless links in such an environment, a special attention should be paid to the antenna design. It is required to be of a low profile, very small regardless of the working frequency-434 MHz in the ISM band, safe, and cost effective. Design of the as-considered antenna is proposed based on a simple model. The approach has been demonstrated for a compact flexible antenna with a factor of 10 with respect to the half-wave antenna, rolling up inside an ingestible pill. Measured and calculated impedance behaviour and radiation characteristics of the modified patch are determined. Excellent agreement was found between experiment and theory.
Bioengineering
Planar antennas have become an integral component in modern biomedical instruments owing to their compact structure, cost effectiveness, and light weight. These antennas are crucial in realizing medical systems such as body area networks, remote health monitoring, and microwave imaging systems. Antennas intended for the above applications should be conformal and fabricated using lightweight materials that are suitable for wear on the human body. Wearable antennas are intended to be placed on the human body to examine its health conditions. Hence, the performance of the antenna, such as its radiation characteristics across the operating frequency bands, should not be affected by human body proximity. This is achieved by selecting appropriate conformal materials whose characteristics remain stable under all environmental conditions. This paper aims to highlight the effects of human body proximity on wearable antenna performance. Additionally, this paper reviews the various types of fl...
A novel 3D printed curved monopole microstrip antenna design for biomedical applications
Physical and Engineering Sciences in Medicine, 2021
This paper proposes a novel and compact monopole microstrip antenna (MA) design with a three-dimensional (3D) printed curved substrate for biomedical applications. A curved substrate was formed by inserting a semi-cylinder structure in the middle of the planar substrate consisting of polylactic acid (PLA). The antenna was fed with a microstrip line, and a partial ground plane was formed at the bottom side of the substrate. The copper plane with two triangular slots is arranged on the curved semi-cylinder structure of the substrate. The physical dimensions of the radiating plane and ground plane were optimally determined with the use of the sparrow search algorithm (SpaSA) to provide a wide-10 dB bandwidth between 3 GHz and 12 GHz. A total of six microstrip antennas having different parameters related to physical dimensions were designed and simulated to compare the performance of the proposed antenna with the help of full-wave electromagnetic simulation software called CST Microwave Studio. The proposed curved antenna was fabricated, and a PNA network analyzer was used to measure the S11 of the proposed antenna. It was demonstrated that the measured S11 covers the desired frequency range.
Implantable Antenna for Biomedical Application
2017
In today’s world the demand for biomedical telemetry is increasing day by day. The idea we are putting forward is an ‘Implantable antenna for biomedical application’. Miniaturization is the major concern for implantable antennas in biomedical application. the degradation of various antenna parameters. In order to meet these were employed to achieve miniaturization in this paper, viz, reducing the antenna dimension, inducing irregularity i the proposed idea we are evaluating the two different cases of the antenna, one without wing circular patch and the other with wing and circular patch, using the HFS applications the United States Federal communication commission has assigned the MICS band whose frequency ranges from 402 implantable antenna which is higher than the MIC antenna has a dimension of 14.64×13.06×0.376
X-Shaped Slotted Patch Biomedical Implantable Antenna for Wireless Communication Networks
Wireless Communications and Mobile Computing
Biomedical implantable antennas have a major role in biomedical telemetry applications. Therefore, a compact-size low-profile implantable antenna working in industrial, scientific, and medical (ISM) band at 915 MHz is presented. The presented antenna is a simple slotted patch fed with a coaxial probe of 50 Ω impedance. The patch consists of four slotted resonators printed on a flexible Roger Duroid RT5880 substrate ( ε r = 2.2 , tan δ = 0.0009 ) with the standard thickness of 0.254 mm. The complete volume of the designed antenna is 7 mm × 7 mm × 0.254 mm ( 0.08 λ g × 0.08 λ g × 0.003 λ g ). The antenna covers the bandwidth from 800 MHz to 1 GHz (200 MHz) inside skin tissue. A good agreement between the simulation and measurements of the antenna has been obtained. Finally, the specific absorption rate (SAR) values have also been analyzed through simulations as 8.17 W/kg inside skin over 1 g of mass tissue. The proposed SAR values are less than the limit of the Federal Communica...
Survey and Classification of Antennas for Medical Applications
2019
This manuscript provides a comprehensive survey of various antenna types used in microwave medical applications. This research is the first step towards the development of a thorough numerical library containing various components used in microwave medical systems such as antennas, phantoms, matching media, etc. The goal of this effort is to enable researchers in this field to efficiently and easily test their algorithms and/or hardware using standardized components. In addition, such a library would encourage considering the whole system instead of partial approach in which, for e.g., developing imaging algorithms ignored the physical sensors etc. Here, we consider various antenna designs that have emerged in the last two decades. In particular, we discuss the chronological evolution of antennas for hyperthermia, biotelemetry and microwave imaging. We also classify antennas with respect to utilized frequency band, such as Medical Implant Communication Service (MICS), Industrial, Sc...