Wideband Wearable Antenna for Biomedical Telemetry Applications

Smida, Besma; Iqbal, Amjad; Alazemi, Abdullah J.; Waly, Mohamed Ibrahim; Ghayoula, Ridha; Kim, Sunghwan

doi:10.1109/access.2020.2967413

Cited by 94 publications

(67 citation statements)

References 38 publications

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“…In order to investigate safety concerns of the user, the SAR intensity must be validated. Therefore, the energy absorbed (SAR) by the user tissues' need not to cross the value of 1.6 W/Kg for 1-g tissue and 2 W/Kg for 10-g tissue [18][19][20]. Theoretically, SAR values are calculated using Equation (4).…”

Section: Specific Absorption Rate (Sar) Analysismentioning

confidence: 99%

Future Smartphone: MIMO Antenna System for 5G Mobile Terminals

et al. 2021

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In this article, an inverted L-shaped monopole eight elements Multiple Input Multiple Output (MIMO) antenna system is presented. The multi-antenna system is designed on a low cost 0.8 mm thick FR4 substrate having dimensions of 136 x 68 mm 2 resonating at 3.5GHz with a 6dB measured bandwidth of 450MHz, and with inter element isolation greater than 15 dB and gain of 4 dBi. The proposed design consists of eight inverted L-shaped elements and parasitic L-shaped strips extending from the ground plane. These shorted stripes acted as tuning stubs for the four inverted L-shaped monopole elements on the side of chassis. This is done to achieve the desired frequency range by increasing the electrical length of the antennas. A prototype is fabricated, and the experimental results show good impedance matching with reasonable measured isolation within the desired frequency range. The MIMO performances, such as envelope correlation coefficient (ECC) and mean effective gain (MEG) are also calculated along with the channel capacity of 38.1bps/Hz approximately 2.6 times that of 4  4 MIMO system. Due to its simple shape and slim design, it may be a potential chassis for future handsets. Therefore, user hand scenarios, i.e. both single and dual hand are studied. Also, the effects of hand scenarios on various MIMO parameters are discussed along with the SAR. The performance of the proposed system in different scenarios suggests that the proposed structure holds promising future within the next generation radio smart phones.INDEX TERMS Antenna efficiency, channel capacity, gain, inverted L-shaped, MIMO antenna, next generation smart phones.

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Section: Specific Absorption Rate (Sar) Analysismentioning

confidence: 99%

Future Smartphone: MIMO Antenna System for 5G Mobile Terminals

et al. 2021

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“…A. Smida et al 10 proposed a triple-band microstrip antenna to operate on the frequencies of 434, 868, and 1400 MHz. The antenna is H-shaped and it was miniaturized, which made impedance matching difficult and significantly reduced its efficiency, falling below 3% in all operating frequencies.…”

Section: Latest Researchesmentioning

confidence: 99%

Proposal of a Microstrip Patch Antenna Array for the Osseus: An Equipment for the Aid of Diagnosis of Osteometabolic Diseases

Pinheiro

et al. 2021

Preprint

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BackgroundApplications on electromagnetic waves in the field of biotelemetry have increased in the latest years, being used to prevent, diagnose, and treatment of several diseases. In this context, biotelemetry allows minimally invasive monitoring of the physiologic, improving the comfort and patient care and significantly reducing hospital costs. Aiming to assist the mineral bone density classification, through a radio frequency signal (RF), for a later diagnosis of osteoporosis, Osseus was proposed in 2018. This equipment is a combination of the application of techniques and concepts of several areas such as software, electrical, electronic, computational, and biomedical engineering, developed at a low cost, with easy access to the population, and non-invasive. However, when placed on evaluation, potential improvements were identified to increase the stability of Osseus operation.ResultsIt is proposed the implementation of improvements in the antennas used by Osseus, aiming its miniaturization, improvement in the reception of the RF signal, and better stability of the equipment's operation. ConclusionTwo antennas were then built, one of which was used as a project for the second, which is an array. The array showed significant improvements in the parameters relevant to the application, being a candidate to replace the antennas currently in use at Osseus.

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“…However, the antenna has narrow working bandwidth and large dimensions. In [ 28 ], a wideband and semi-flexible antenna is designed for wearable applications. The bandwidth is enhanced by using a hook-shaped stub resonator with the ground plane.…”

Section: Introductionmentioning

confidence: 99%

A Low-Profile Ultrawideband Antenna Based on Flexible Graphite Films for On-Body Wearable Applications

Liu

et al. 2021

Materials

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This paper presents a low-profile ultrawideband antenna for on-body wearable applications. The proposed antenna is based on highly conductive flexible graphite films (FGF) and polyimide (PI) substrate, which exhibits good benefits such as flexibility, light weight and corrosion resistance compared with traditional materials. By introducing flaring ground and an arrow-shaped slot, better impedance matching is achieved. The wearable antenna achieves a bandwidth of 122% from 0.34 GHz to 1.4 GHz, with a reflection coefficient of less than −10 dB, while exhibiting an omnidirectional pattern in the horizontal plane. To validate the proposed design, the wearable antenna with a profile of ~0.1 mm was fabricated and measured. The measured results are in good agreement with simulated ones, which indicates a suitable candidate for on-body wearable devices.

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Wideband Wearable Antenna for Biomedical Telemetry Applications

Cited by 94 publications

References 38 publications

Future Smartphone: MIMO Antenna System for 5G Mobile Terminals

Future Smartphone: MIMO Antenna System for 5G Mobile Terminals

Proposal of a Microstrip Patch Antenna Array for the Osseus: An Equipment for the Aid of Diagnosis of Osteometabolic Diseases

A Low-Profile Ultrawideband Antenna Based on Flexible Graphite Films for On-Body Wearable Applications

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