Capsule Antenna Design Based on Transmission Factor through the Human Body

2018 ◽  
Vol E101.B (2) ◽  
pp. 357-363 ◽  
Author(s):  
Yang LI ◽  
Hiroyasu SATO ◽  
Qiang CHEN
Keyword(s):  
Human Body ◽  
Antenna Design ◽  
Transmission Factor

scholarly journals Integrated Miniature Multiband Antenna Designed for WWD and SAR Assessment for Human Exposure

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Brahim Fady ◽  
Jaouad Terhzaz ◽  
Abdelwahed Tribak ◽  
Fatima Riouch
Keyword(s):  
Human Body ◽  
Human Exposure ◽  
Absorption Rate ◽  
Specific Absorption Rate ◽  
Low Cost ◽  
Antenna Design ◽  
Head Model ◽  
Use Case ◽  
Wireless Devices ◽  
Multiband Antenna

The article introduces a new, low-cost, integrated, multiband antenna design intended for wristbands and wearable wireless devices (WWD). With a miniaturized planar square-shape sizing 29 × 29 mm2, the antenna can fit easily inside WWDs. The proposed design covers the most used frequency bands such as LTE2300, ISM2400, LTE2600, WiMAX3500, WiMAX5200, and ISM5800 in which the antenna reaches up to −25 dB and 6.9 dBi in terms of S11 and gain, respectively. To evaluate the exposure amenability of design on human body, we studied the specific absorption rate (SAR) of the design in two main use cases: multilayered human wrist model and a SAM (Specific Anthropomorphic Mannequin) head model. In each use case, the SAR results in different positions for all frequencies are compared to FCC standards.

Design and Analysis of Wearable Antennas

2021 ◽  
pp. 85-97
Author(s):  
Mahesh Kumar Aghwariya ◽  
Amit Kumar ◽  
Ragini Sharma
Keyword(s):  
Wireless Communication ◽  
Human Body ◽  
The Body ◽  
Antenna Design ◽  
Maximum Efficiency ◽  
Wearable Antenna ◽  
Wearable Antennas ◽  
Flexible Material

This chapter presents the various designing methods and challenges associated with wearable antennas, selecting the designing material, various fabrication techniques, and implementation methods on the fabric. Wearable antennas have gained popularity in recent years due to their unmatched properties and unique features. The wearable antenna is capable of providing effective wireless communication, tracking, and sensing. These types of antenna need to be conformal when used on numerous parts of the human body, and they need to be lightweight, flexible, and must be implemented easily on the flexible material. These antennas must be capable of operating with maximum efficiency on the human body. These requirements make the wearable antenna design challenging. They also need to be compact in size, better in coupling with the body, and must be capable of handling issues associated with the device when the target is moving.

scholarly journals Optimization of wearable microwave antenna with simplified electromagnetic model of the human body

Open Physics ◽  
2017 ◽  
Vol 15 (1) ◽  
pp. 1055-1060 ◽  
Author(s):  
Łukasz Januszkiewicz ◽  
Paolo Di Barba ◽  
Sławomir Hausman
Keyword(s):  
Human Body ◽  
Optimization Design ◽  
Impedance Matching ◽  
Optimization Procedure ◽  
Antenna Design ◽  
Microwave Antenna ◽  
Human Body Model ◽  
Wearable Antenna ◽  
Electromagnetic Model ◽  
The Stability

AbstractIn this paper the problem of optimization design of a microwave wearable antenna is investigated. Reference is made to a specific antenna design that is a wideband Vee antenna the geometry of which is characterized by 6 parameters. These parameters were automatically adjusted with an evolution strategy based algorithm EStra to obtain the impedance matching of the antenna located in the proximity of the human body. The antenna was designed to operate in the ISM (industrial, scientific, medical) band which covers the frequency range of 2.4 GHz up to 2.5 GHz. The optimization procedure used the finite-difference time-domain method based full-wave simulator with a simplified human body model. In the optimization procedure small movements of antenna towards or away of the human body that are likely to happen during real use were considered. The stability of the antenna parameters irrespective of the movements of the user’s body is an important factor in wearable antenna design. The optimization procedure allowed obtaining good impedance matching for a given range of antenna distances with respect to the human body.

scholarly journals Antenna design and fabrication for biotelemetry applications

2021 ◽  
Vol 11 (4) ◽  
pp. 3639
Author(s):  
Sourav Sinha ◽  
Raja Rashidul Hasan ◽  
Ta-Seen Reaz Niloy ◽  
Md. Abdur Rahman
Keyword(s):  
Human Body ◽  
Patch Antenna ◽  
Communication Systems ◽  
Open Space ◽  
Research Work ◽  
Antenna Design ◽  
Total Efficiency ◽  
Phantom Model ◽  
Copper Material

<span>This research work assumes the role of designing a Micro-strip patch antenna that exists with in 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 flexiblility 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 10g tissue. Various Parameters such as VSWR, S11, Radiation efficiency, Total efficiency were found 1.1889, -21.28 dB, <br /> -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.</span>

scholarly journals Design a compact square ring patch antenna with AMC for SAR reduction in WBAN applications

2020 ◽  
Vol 9 (1) ◽  
pp. 370-378
Author(s):  
Abdul Rashid Omar Mumin ◽  
R. Alias ◽  
Jiwa Abdullah ◽  
Samsul Haimi Dahlan ◽  
Jawad Ali ◽  
...  
Keyword(s):  
Human Body ◽  
Patch Antenna ◽  
Medical Technology ◽  
Radiation Efficiency ◽  
Antenna Design ◽  
Impedance Bandwidth ◽  
Portable Devices ◽  
Frequency Detuning ◽  
High Loss ◽  
Critical Issues

In this paper presents a compact square ring patch antenna with miniaturized AMC structure at 5.8 GHz for WBAN applications. To minimize detuning, keeping its radiation efficiency high and acceptable gain while keeping the SAR levels low for safety is a challenging task. One of the critical issues in WBAN antenna design is the size of the antenna for portable devices, because the size affects the gain and bandwidth. The AMC configuration decreases the back radiation and the effect frequency detuning results from the high loss in the human body. Furthermore, the AMC also increases the front-to-back ratio (FBR) of 15.3 dB. The proposed antenna has dimensions of 15.27×15.27×2.2 mm3 and provides a 404 MHz impedance bandwidth, with a gain improvement of 8.69 dBi and a 93.7% reduction of the initial SAR value. For this reason, the antenna is suitable for WBAN application in various fields, particularly in medical technology.

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