CPW‐fed monopole antenna with reduced radiation hazards toward human head using metallic thin‐wire mesh for 802.11ac applications

Gunavathi, N.; Sriramkumar, D.

doi:10.1002/mop.29411

Cited by 9 publications

(7 citation statements)

References 10 publications

(9 reference statements)

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“…Various planar structures consisting of large ground planes [91], ferrite-based substrates [92], thin mesh-wire planes [93], soft surfaces [94], thick fabric Layers [95], and AMC metasurfaces [99] have been proposed to isolate the antenna from the potential effects of the host body. As reported in [97], a multi-layered, all textile antenna has been fabricated with a full ground plane to attain unidirectional radiation pattern and low SAR value for on-body communication (see Figure 13(b)).…”

Section: Effects Of the Human Body On Wearable Antennasmentioning

confidence: 99%

Wearable Antennas: A Review of Materials, Structures, and Innovative Features for Autonomous Communication and Sensing

et al. 2019

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Wearable antennas have gained much attention in recent years due to their attractive features and possibilities in enabling lightweight, flexible, low cost, and portable wireless communication and sensing. Such antennas need to be conformal when used on different parts of the human body, thus need to be implemented using flexible materials and designed in a low profile structure. Ultimately, these antennas need to be capable of operating with minimum degradation in proximity to the human body. Such requirements render the design of wearable antennas challenging, especially when considering aspects such as their size compactness, effects of structural deformation and coupling to the body, and fabrication complexity and accuracy. Despite slight variations in severity according to applications, most of these issues exist in the context of body-worn implementation. This review aims to present different challenges and issues in designing wearable antennas, their material selection, and fabrication techniques. More importantly, recent innovative methods in back radiations reduction techniques, circular polarization (CP) generation methods, dual polarization techniques, and providing additional robustness against environmental effects are first presented. This is followed by a discussion of innovative features and their respective methods in alleviating these issues recently proposed by the scientific community researching in this field. INDEX TERMSWearable devices, Internet of Things (IoT), wearable antennas, flexible, reconfigurable antennas, energy harvesting for wearable devices, specific absorption rate (SAR).

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Section: Effects Of the Human Body On Wearable Antennasmentioning

confidence: 99%

Wearable Antennas: A Review of Materials, Structures, and Innovative Features for Autonomous Communication and Sensing

et al. 2019

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“…The CPW fed planar antennas [6][7][8], a spiral CSRR loaded antenna [9], and a circular SRR inspired antenna [10] are proposed for single-band operation. A hexagonal split-ring metamaterial-inspired dualband antenna [11], a circular CSRR inspired cross-shaped dual-band antenna [12], and a triangular SRR metamaterial-inspired dual-band antenna [13] are designed for WLAN applications.…”

Section: Introductionmentioning

confidence: 99%

Hexagonal Split Ring Resonator Enclosed Circular Split Ring Resonator Inspired Dual-Band Antenna for Sub-6 GHZ 5g Nr and Ieee 802.11BA/BE Applications

Rajalakshmi¹,

Gunavathi²

2021

PIER C

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In this article, a novel Hexagonal Split-Ring Resonator enclosed Circular Split-Ring Resonator (HSRR-CSRR) inspired printed antenna is presented for sub-6 GHz 5G NR and IEEE 802.11ba/be applications. The proposed antenna comprises an HSRR-CSRR and a D-SHSRR metamaterial unit cell with a partial ground plane. The designed antenna is printed on a low-cost FR-4 substrate with dielectric constant ε r of 4.4, thickness of 1.6 mm, and loss tangent of 0.02. An HSRR-CSRR metamaterial structure is designed to get the three distinct resonance frequencies at 3.5 GHz, 5.05 GHz, and 6.2 GHz, respectively. To cover the entire band of Sub-6 GHz 5G NR (5-6 GHz), a Double-slit Single Hexagonal Split Ring Resonator (D-SHSRR) is designed for 5.8 GHz and loaded along with the HSRR-CSRR. The operating principle, equivalent circuit, and parametric extraction of the HSRR-CSRR structure are examined. Compared to the conventional antenna, the proposed antenna has a compact size of 0.38λ g × 0.52λ g × 0.03λ g . The antenna parameters have been investigated using Ansys HFSS 15.0 software. The measured and simulated results are in good agreement.

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“…In [16], a modified split-ring resonator based short ended metamaterial antenna was discussed, which covered only Wi-Max applications. A coplanar waveguide fed planar antenna was proposed only to cover IEEE 802.11ac applications [17,18]. The above mentioned already proposed antennas had obstacles such as large size or complex structure/design, and also they did not cover tri-bands.…”

Section: Introductionmentioning

confidence: 99%

Compact Modified Hexagonal Spiral Resonator Based Tri-Band Patch Antenna With Octagonal Slot for Wi-Fi/Wlan Applications

Gunavathi¹

2020

PIER C

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In this paper, a compact modified hexagonal spiral resonator-based tri-band patch antenna with an octagonal slot is presented for Wi-Fi/WLAN applications. The proposed antenna is designed on a low-cost FR4 substrate with a dielectric constant of ε r = 4.4 and a loss tangent of δ = 0.02. The tri-band operations have been achieved by a Modified Hexagonal Complementary Spiral Resonator (MHCSR) and an Octagonal slot. The loading of the MHCSR at the bottom of the substrate is to cover the 900 MHz (IEEE 802.11ah) band, and an Octagonal slot on top of the 5 GHz (IEEE 802.11a/h/j/n/ac/ax) rectangle patch is to cover the 2.4 GHz (IEEE 802.11b/g/n/ax) band. The prototype of the proposed antenna is fabricated and tested to validate the simulation results. The measured impedance bandwidth is 105 MHz at 900 MHz, 160 MHz at 2.4 GHz, and 180 MHz at 5 GHz. The designed antenna has a compact size with overall dimensions of 0.054λ 0 × 0.066λ 0 × 0.0048λ 0 (18 × 22 × 1.6 mm 3). The 82.2% reduction in size has been accomplished as compared to a conventional patch antenna at 900 MHz (lower resonance frequency). The waveguide setup method has been used to validate a negative permittivity property of the MHCSR. The parametric analysis of the proposed antenna has been carried out using the Ansoft HFSS19 software.

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CPW‐fed monopole antenna with reduced radiation hazards toward human head using metallic thin‐wire mesh for 802.11ac applications

Cited by 9 publications

References 10 publications

Wearable Antennas: A Review of Materials, Structures, and Innovative Features for Autonomous Communication and Sensing

Wearable Antennas: A Review of Materials, Structures, and Innovative Features for Autonomous Communication and Sensing

Hexagonal Split Ring Resonator Enclosed Circular Split Ring Resonator Inspired Dual-Band Antenna for Sub-6 GHZ 5g Nr and Ieee 802.11BA/BE Applications

Compact Modified Hexagonal Spiral Resonator Based Tri-Band Patch Antenna With Octagonal Slot for Wi-Fi/Wlan Applications

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