Built‐in antenna design for 2.4 GHz ISM band and GPS operations in a wrist‐worn wireless communication device

Chung, Ming‐An; Yang, Chang‐Fa

doi:10.1049/iet-map.2015.0785

Cited by 22 publications

(9 citation statements)

References 29 publications

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“…RF switches were implemented to enable dual-polarized characteristics on the probe-fed GPS antenna, which is designed to be part of jackets and raincoats. A three-dimensional LP antenna structure working on both GPS/WLAN bands 9 for wrist-worn application [86]. This dual band and the dualfeed antenna evaluated on human hand-phantom exhibited reasonable radiation performance in term of its gain and efficiency.…”

Section: Wearable Single and Dual Polarized 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: Wearable Single and Dual Polarized 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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“…This will bring a challenge because the space allowed by wrist-worn devices with embedded antenna is very limited. In the latest research papers in the past five years, we observed that the antenna design for watch application almost only single band as ISM (industrial, scientific and medical, 2.4 GHz) or GPS (global positioning system) band [16][17][18][19][20][21][22]. Although there are smart watch devices design with wideband code division multiple access (WCDMA) and long-term evolution (LTE) applications, in the recent literature, only a single frequency band or a specific frequency band with a small bandwidth are designed in these antennas design [23][24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Embedded 3D multi‐band antenna with ETS process technology covering LTE/WCDMA/ISM band operations in a smart wrist wearable wireless mobile communication device design

Chung

2019

IET Microwaves, Antennas & Propagation

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An internal etching for three‐dimensional structures (ETS) antenna capable of operating in the 810–960, 1370–1450 and 1710–2630 MHz bands, respectively, for long‐term evolution (LTE)/wideband code division multiple access (WCDMA)/2.4 GHz industrial, scientific and medical (ISM) band operations suitable for being embedded within a smart wrist wearable wireless mobile communication device is proposed. The proposed antenna radiation efficiency can achieve 37.8–55.3% from 810–960 MHz, 53.1–92.63% from 1370–1450 MHz and 52.9–93.1% from 1710–1630 MHz for LTE/WCDMA bands and 87.4% for ISM band without the hand phantom in the free space condition. The antenna radiation efficiency of the LTE/WCDMA and ISM bands is reduced by half because of the hand phantom with lossy material properties. Furthermore, the health risk related to exposure to electromagnetic radiation, the specific absorption rates of the device are evaluated and the results were far below the limits required by the Federal Communications Commission (FCC) organisation. The embedded three‐dimensional (3D) multi‐band antenna can be adapted for the smart wrist wearable wireless mobile communication device. This study breaks the pattern that wearable devices must work with mobile phones. The wearable device proposed herein can directly communicate with the carrier base station independently.

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“…In Ref. , a built‐in antenna works perfectly in GPS and ISM band, the antenna is built with complex materials and it is suitable for wearable devices such as smart watch.…”

Section: Introductionmentioning

confidence: 99%

Novel miniaturized multiband antenna and applications for smart navigation media

Fady

Terhzaz²,

Tribak

et al. 2019

Int J RF Microw Comput Aided Eng

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This article presents a novel low-cost integrated multiband antenna design customized for navigation media applications. The distinctive feature of the design consists in using a broadband planar dipole with four arms and a miniaturized feeding-point, easy to deploy inside the tracking devices, and cost-effective for supply chain industry. The article first introduces the main challenges and the benefits of miniaturizing antennas for supply-chain and particularly for navigation media system which is the case-study. Further the parametric study and final dimensions of the design and the simulation results are discussed. The proposed design is fabricated and the measurements of the radiation pattern and the return loss are performed proving that the antenna with maximum gain up to 10 dBi and S 11 up to −30 dB, exhibits excellent performance for all the frequencies required in the navigation media systems such as 1. 6, 1.8, 2.3, 2.4, 2.6, 3.6, and 5.8 GHz. The proposed design was implemented and tested inside a tracking device mounted on a vehicle and compared with existing commercial antennas. This study showed that the proposed antenna is suitable for tracking devices as it is miniaturized for internal integration and it has better 4G and GPS signal detection and low power consumption comparatively with existing commercial antennas. K E Y W O R D Sminiaturized antenna, multiband, navigation media systems, supply-chain

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Built‐in antenna design for 2.4 GHz ISM band and GPS operations in a wrist‐worn wireless communication device

Cited by 22 publications

References 29 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

Embedded 3D multi‐band antenna with ETS process technology covering LTE/WCDMA/ISM band operations in a smart wrist wearable wireless mobile communication device design

Novel miniaturized multiband antenna and applications for smart navigation media

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