A Novel Wearable Circularly Polarized Antenna in Body-Centric Wireless Communications

2011 ◽  
Vol 403-408 ◽  
pp. 1946-1949 ◽  
Author(s):  
Ning Liu ◽  
Ying Hua Lu ◽  
Si Hai Qiu ◽  
Peng Li
Keyword(s):  
Wireless Communications ◽  
Microstrip Antenna ◽  
Absorption Rate ◽  
Specific Absorption Rate ◽  
The Body ◽  
Communication Link ◽  
Layer Model ◽  
Research Topics ◽  
Circularly Polarized ◽  
Textile Antenna

Wearable, textile-based antennas are dominated research topics for body-centric communications because it could be easily worn on body and integrated into clothes. Since the antenna will operate on a moving person, a circularly polarized antenna is needed in order to optimize the off-body communication link. A wearable circularly polarized textile antenna for body-centric wireless communications is designed in this paper. The proposed antenna is a square-ring microstrip antenna with truncated corners with the bandwidth of 9% when off the body. When it is near the body, we simulate the human body as three-layer model including skin, fat and muscle and put the antenna at different distances to the body. The situation of antenna bending is also simulated at different radii. Specific Absorption Rate was evaluated at last.

Dual-band all textile antenna with AMC for heartbeat monitor and pacemaker control applications

2021 ◽  
pp. 1-16
Author(s):  
Farah R. Kareem ◽  
Mohamed El Atrash ◽  
Ahmed A. Ibrahim ◽  
Mahmoud A. Abdalla
Keyword(s):  
Indoor Environment ◽  
Specific Absorption Rate ◽  
The Body ◽  
Dual Band ◽  
Magnetic Conductor ◽  
Control Applications ◽  
High Agreement ◽  
Low Profile ◽  
Textile Antenna ◽  
Wearable Medical

Abstract All textile integrated dual-band monopole antenna with an artificial magnetic conductor (AMC) is proposed. The proposed design operates at 2.4 and 5.8 GHz for wearable medical applications to monitor the heartbeat. A flexible and low-profile E- shaped CPW dual-band textile antenna is integrated with a 4 × 4 dual-band textile AMC reflector to enhance the gain and specific absorption rate (SAR). The SAR is reduced by nearly 95% at both 1 and 10 g. The design was measured on the body with a 2 mm separation. The simulated and measured results appear in high agreement in the case of with and without AMC array integration. The measurement was performed in the indoor environment and in an anechoic chamber to validate the design based on reflection coefficient and radiation pattern measurements.

scholarly journals An overview of available metamaterial-based antenna for non-invasive hyperthermia cancer treatment

2019 ◽  
Vol 14 (2) ◽  
pp. 697 ◽  
Author(s):  
Nabilah Abdul Jaffar ◽  
Norlida Buniyamin ◽  
Kasumawati Lias
Keyword(s):  
Cancer Treatment ◽  
Hot Spots ◽  
Microstrip Antenna ◽  
Absorption Rate ◽  
Specific Absorption Rate ◽  
Treatment Procedure ◽  
Focusing Effect ◽  
Non Invasive ◽  
Left Handed ◽  
Tumor Area

This paper presents the outcome of a literature review that an overview of various types of antenna and metamaterial applicator performance towards cancerous tissue or cell for non-invasive hyperthermia cancer treatment (NIHCT) procedure. From the review, it shows that when LHM lens integrated with an antenna, focusing capabilities of the antenna towards the cancerous area can be improved. However, current applicators have a poor focusing effect when directed towards the actual tumor area. In conjunction with that, this paper proposes a new design of modified applicator that is microstrip antenna integrated with left-handed metamaterial (LHM) lens. The antenna termed microstrip-LHM (M-LHM) lens antenna is proposed for use in NIHCT. It is expected to improve the focusing capabilities of an antenna which is used to kill the cancerous area and thus improve the hyperthermia cancer treatment procedure success rate. In addition, this paper provides an overview of heating techniques used in hyperthermia to enhance focusing capabilities and a few metamaterial advantages that can improve the focusing effect and reduced the hot-spots. Specific Absorption Rate (SAR) will be investigated to evaluate the focusing abilities of the proposed applicator using the SEMCAD X Solver.

scholarly journals Dual Slot H Shape Antenna for SAR Estimation

2020 ◽  
Vol 8 (5) ◽  
pp. 3376-3380
Keyword(s):  
Mobile Communication ◽  
Microstrip Antenna ◽  
Absorption Rate ◽  
Specific Absorption Rate ◽  
Equal Size ◽  
Specific Absorption

In the proposed work, H-shaped microstrip antenna is designed with two slots. Itoperates at a frequency of 2.2GHz with a FR-4 substrate. The proposed antenna is designed for UHF application like mobile communication. The dimension of the proposed antenna is 42 x 30x 1.6 mm^3. Two equal size parasitic patches are being introduced to implement the H shape and simulated using HFSS software. Further, Specific Absorption Rate (SAR) of the proposed antenna is found out. Average SAR value for this proposed design appears to be 0.39 W/Kg, which is also far less than the prescribed value by Telecom Engineering Center (TEC) of 1.6W/Kg.

scholarly journals SAR Evaluation of Metallic Loop-like Accessory Effect of Broadband Wearable Planar Monopole Textile Antenna

2018 ◽  
Vol 7 (3) ◽  
pp. 17-22
Author(s):  
H. H. Zainal ◽  
H. A. Rahim ◽  
P. J. Soh ◽  
H. Lago ◽  
K. N. A. Rani ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Absorption Rate ◽  
Specific Absorption Rate ◽  
Monopole Antenna ◽  
Specific Absorption ◽  
Textile Antenna ◽  
The Common ◽  
Cst Microwave Studio

This paper presents the investigation influence of the common metallic loop like accessory on Specific Absorption Rate (SAR) averaged over 10g and 1 g tissue.The simulations were made by means CST Microwave Studio software at frequencies 2.45GHz and 2.6GHz. Numerical analysis conducted using broadband textile monopole antenna (TM) with variations of orientation and distance showed that the SAR value increased when the antenna horizontally polarized.This is up to 80% more than vertically polarized TM placed closest item to 2mm.

scholarly journals Next-generation UWB antennas gadgets for human health care using SAR

2021 ◽  
Vol 2021 (1) ◽  
Author(s):  
Aysha Maryam Ali ◽  
Mohammed A. Al Ghamdi ◽  
Muhammad Munwar Iqbal ◽  
Shehzad Khalid ◽  
Hamza Aldabbas1 ◽  
...  
Keyword(s):  
Health Care ◽  
Absorption Rate ◽  
Specific Absorption Rate ◽  
Wide Band ◽  
The Body ◽  
Ultra Wide Band ◽  
Body Area Network ◽  
Area Network ◽  
Body Area ◽  
Specific Absorption

AbstractThe body area network is now the most challenging and most popular network for study and research. Communication about the body has undoubtedly taken its place due to a wide variety of applications in industry, health care, and everyday life in wireless network technologies. The body area network requires such smart antennas that can provide the best benefits and reduce interference with the same channel. The discovery of this type of antenna design is at the initiative of this research. In this work, to get a good variety, the emphasis is on examining different techniques. The ultra-wide band is designed, simulated, and manufactured because the ultra-wide band offers better performance compared to narrowband antennas. To analyze the specific absorption rate, we designed a multilayer model of human head and hand in the high-frequency structure simulator. In the final stage, we simulated our antennas designed with the head and hand model to calculate the results of the specific absorption rate. The analysis of the specific absorption rate for the head and hand was calculated by placing the antennas on the designed model.

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