scholarly journals Dual Band Wearable Antenna for IOT Applications

2019 ◽  
Vol 9 (1) ◽  
pp. 1515-1518
Keyword(s):  
Absorption Rate ◽  
Specific Absorption Rate ◽  
Ground Plane ◽  
Ethylene Vinyl Acetate ◽  
Dual Band ◽  
Area Network ◽  
Body Area ◽  
Bandwidth Enhancement ◽  
Iot Applications ◽  
Wearable Antenna

A dual band wearable antenna operating on 2.6 GHz (2570-2620 MHz FDD/TDD) and 5.2 GHz (802.11a) bands for Body Area Network (BAN) application is presented. The stack substrates of Felt and ethylene-vinyl acetate (EVA) foam are used to make the structure flexible. Maximum gain of 2.75 and front to back ratio of 8.35 is achieved on industrial scientific and medical (ISM) band. Additional bandwidth enhancement has been achieved by creating slots on partial ground plane. The calculated specific absorption rate (SAR) value is 1.33 W/kg for 1 g of body tissue. Simulated and measured results are presented for the proposed structure.

scholarly journals J-slot EBG structure for SAR Reduction of Dual Band J-slot Textile Antenna

2018 ◽  
Vol 12 (2) ◽  
pp. 794
Author(s):  
Ramesh Manikonda ◽  
Rajyalakshmi Valluri ◽  
Mallikarjuna Rao Prudhivi
Keyword(s):  
Absorption Rate ◽  
Specific Absorption Rate ◽  
Wireless Body Area Network ◽  
Dual Band ◽  
Area Network ◽  
The Novel ◽  
Body Area ◽  
Electromagnetic Band Gap ◽  
Gain Enhancement ◽  
Textile Antenna

<p><span>In this article, the dual band is achieved with J-slot on rectangular Textile antenna on Jeans fabric as substrate. It resonates at the 2.4 GHz and 5.4 GHz of Wireless Body Area Network (WBAN) bands. The novel J-slot Electromagnetic Band Gap (EBG) array consists of 2x2 elements. It is used as superstrate of J-slot textile antenna for Specific Absorption Rate (SAR) reduction and gain enhancement. The Reflection coefficient and VSWR of dual band textile antenna are simulated and measured with and without human body<strong>.</strong></span></p>

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.

scholarly journals Realizing UWB Antenna Array with Dual and Wide Rejection Bands Using Metamaterial and Electromagnetic Bandgaps Techniques

Micromachines ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 269
Author(s):  
Ayman A. Althuwayb ◽  
Mohammad Alibakhshikenari ◽  
Bal S. Virdee ◽  
Pancham Shukla ◽  
Ernesto Limiti
Keyword(s):  
Antenna Array ◽  
Ground Plane ◽  
Ultra Wideband ◽  
Dual Band ◽  
Area Network ◽  
Electromagnetic Bandgap ◽  
Uwb Antenna ◽  
Average Gain ◽  
Left Handed ◽  
Notched Band

This research article describes a technique for realizing wideband dual notched functionality in an ultra-wideband (UWB) antenna array based on metamaterial and electromagnetic bandgap (EBG) techniques. For comparison purposes, a reference antenna array was initially designed comprising hexagonal patches that are interconnected to each other. The array was fabricated on standard FR-4 substrate with thickness of 0.8 mm. The reference antenna exhibited an average gain of 1.5 dBi across 5.25–10.1 GHz. To improve the array’s impedance bandwidth for application in UWB systems metamaterial (MTM) characteristics were applied it. This involved embedding hexagonal slots in patch and shorting the patch to the ground-plane with metallic via. This essentially transformed the antenna to a composite right/left-handed structure that behaved like series left-handed capacitance and shunt left-handed inductance. The proposed MTM antenna array now operated over a much wider frequency range (2–12 GHz) with average gain of 5 dBi. Notched band functionality was incorporated in the proposed array to eliminate unwanted interference signals from other wireless communications systems that coexist inside the UWB spectrum. This was achieved by introducing electromagnetic bandgap in the array by etching circular slots on the ground-plane that are aligned underneath each patch and interconnecting microstrip-line in the array. The proposed techniques had no effect on the dimensions of the antenna array (20 mm × 20 mm × 0.87 mm). The results presented confirm dual-band rejection at the wireless local area network (WLAN) band (5.15–5.825 GHz) and X-band satellite downlink communication band (7.10–7.76 GHz). Compared to other dual notched band designs previously published the footprint of the proposed technique is smaller and its rejection notches completely cover the bandwidth of interfering signals.

Design of dual band-notched lamp-shaped antenna with UWB characteristics

2015 ◽  
Vol 9 (2) ◽  
pp. 395-402 ◽  
Author(s):  
Swati Yadav ◽  
Anil Kumar Gautam ◽  
Binod Kumar Kanaujia
Keyword(s):  
Electromagnetic Interference ◽  
Wireless Local Area Network ◽  
Local Area Network ◽  
Ground Plane ◽  
Dual Band ◽  
Electrical Performance ◽  
Impedance Bandwidth ◽  
Area Network ◽  
Impedance Mismatch ◽  
Rectangular Slot

To restrict electromagnetic interference at WiMAX (3.3–3.7 GHz) and wireless local area network (WLAN) (5.15–5.825 GHz) bands operating within ultra wide bandwidth (UWB) band, a novel design of lamp-shaped UWB microstrip antenna with dual band-notched characteristics is presented. The proposed antenna is composed of a lamp-shaped radiating patch with two rectangular ground planes on both the sides of the radiator with the gap of 0.57 mm. To improve impedance mismatch at middle frequencies, two triangular strips one at each of the ground plane are added; whereas a rectangular slot is etched in the radiating patch to remove impedance mismatch at higher frequencies of the UWB band. Furthermore, an L-shaped slot in the radiator and two L-shaped slots in the ground plane are used to restrict electromagnetic interference (EMI) at WiMAX and WLAN bands, respectively, without affecting the electrical performance of the UWB antenna. Effects of the key parameters on the frequency range of the notched bands are also investigated. The proposed design shows a measured impedance bandwidth of 12.5 GHz (2.7–14.4 GHz), with the two band-notched bands of 3.0–3.9 and 4.9–5.8 GHz. The antenna is suitable to be integrated within the portable UWB devices without EMI interference at WiMAX and WLAN bands.

Specific Absorption Rate Calculation and Motion Channel Models of Body Area Networks

2016 ◽  
Vol 13 (2) ◽  
pp. 1475-1478
Author(s):  
Yu Pang ◽  
Di-Hui Li ◽  
Jin-Zhao Lin ◽  
Guo-Quan Li ◽  
Zhang-Yong Li ◽  
...  
Keyword(s):  
Absorption Rate ◽  
Specific Absorption Rate ◽  
Body Area Networks ◽  
Body Area ◽  
Channel Models ◽  
Specific Absorption ◽  
Rate Calculation

scholarly journals Design of a Dual-Band On-Body Antenna for a Wireless Body Area Network Repeater System

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Kyeol Kwon ◽  
Jaegeun Ha ◽  
Soonyong Lee ◽  
Jaehoon Choi
Keyword(s):  
Human Body ◽  
Return Loss ◽  
Wireless Body Area Network ◽  
Dual Band ◽  
Body Area Network ◽  
Area Network ◽  
Resonance Property ◽  
Body Area ◽  
Dual Band Antenna ◽  
Mics Band

A dual-band on-body antenna for a wireless body area network repeater system is proposed. The designed dual-band antenna has the maximum radiation directed toward the inside of the human body in the medical implantable communication service (MICS) band in order to collect vital information from the human body and directed toward the outside in the industrial, scientific, and medical (ISM) band to transmit that information to a monitoring system. In addition, the return loss property of the antenna is insensitive to human body effects by utilizing the epsilon negative zeroth-order resonance property.

scholarly journals Improved Handset Antenna Performance via an Electrically Extended Ground Plane

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Shirook M. Ali ◽  
Huanhuan Gu ◽  
Kelce Wilson ◽  
James Warden
Keyword(s):  
Absorption Rate ◽  
Specific Absorption Rate ◽  
Near Field ◽  
Ground Plane ◽  
Practical Approach ◽  
Far Field ◽  
Specific Absorption ◽  
Antenna Performance ◽  
Field Patterns ◽  
Surface Metal

A novel and practical approach is presented providing improved antenna performance without enlarging the antenna or the ground plane. The approach electrically extends the ground plane using wire(s) that behave as surface metal extensions of the ground plane. The wire extensions can be accommodated within typical handset housing or as part of the stylish metal used on the handset’s exterior perimeter; hence don’t require enlargement of the device. Consequently, this approach avoids the costs and limitations traditionally associated with physically lengthening of a ground plane. Eight variations are presented and compared with baseline antenna performance. Both far-field patterns and near-field electromagnetic scans demonstrate that the proposed approach controls the electrical length of the ground plane and hence its chassis wavemodes, without negatively impacting the characteristics of the antenna. Improvements in performance of up to 56% in bandwidth at 900 MHz and up to 12% in efficiency with a reduction of up to 12% in the specific absorption rate (SAR) are achieved. An 8% increase in efficiency with a 1.3% improvement in bandwidth and a 20% reduction in SAR is achieved at 1880 MHz. Thus, improvements in bandwidth are achieved without compromising efficiency. Further, improvements at lower frequencies do not compromise performance at higher frequencies.

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