A wearable antenna based on fabric materials with circular polarization for Body-centric wireless communications

Ashyap, Adel Y. I.; Abidin, Zuhairiah Zainal; Dahlan, Samsul Haimi; Shah, Shaharil Mohd; Majid, H. A.; Yee, See Khee; Malek, Norun Abdul

doi:10.11591/ijeecs.v18.i1.pp335-342

Cited by 10 publications

(5 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A full ground plane is used to back the MPA in order to obtain a better performance in terms of gain, efficiency, and radiation. Moreover, the use of full ground is considered to be beneficial for antennas that are developed to operate in close proximity to the human body [32], as it will act as isolation between the antenna and the body. Therefore, it will reduce any risk caused by radiation.…”

Section: Antenna Designmentioning

confidence: 99%

Multi-Band Metamaterial Antenna for Terahertz Applications

Ashyap¹,

Inam²,

Kamarudin³

et al. 2023

Computers, Materials &Amp; Continua

View full text Add to dashboard Cite

A multi-band metamaterial antenna is proposed to operate at the terahertz (THz) band for medical applications. The proposed structure is designed on a polyimide as a support layer, and its radiating elements are made of graphene. Initially, the design is started with a conventional shape showing a single operating frequency at 1.1 THz. To achieve a multi-band operating frequency, the conventional shape was replaced with the proposed metamaterial as a radiating patch that has properties not exist in nature. The multi-band frequencies are obtained without compromising the overall size of the design. The overall size is 600 × 600 × 25 μm 3 . The operating frequencies are 0.36, 0.49, 0.69, 0.87, and 1.04 THz. A full ground plane is used to behave as isolation between the design and the human body model. The proposed design is investigated on free space and on the human body model, showing excellent performance in both cases. The achieved gains for the following frequencies 0.36, 0.49, 0.69, 0.87, and 1.04 THz are 4.81, 6.5, 8.41, 6.02,and 7.96 dB, respectively, while the efficiencies are 83.91%, 96.28%, 90.80%, 91.71%, and 92.99%, respectively. The conventional design was modified to have a partial ground to show the benefit of using the full ground. The design is loaded on the human body model and its performance is affected. The efficiency and gain are 6.61 dB and 95.58.7% for the case of no human body model, and 4.26 dB and 40.30% for the case of using a human body model. Hence, the proposed metamaterial antenna will be useful for future medical applications in the THz band.

show abstract

Section: Antenna Designmentioning

confidence: 99%

Multi-Band Metamaterial Antenna for Terahertz Applications

Ashyap¹,

Inam²,

Kamarudin³

et al. 2023

Computers, Materials &Amp; Continua

View full text Add to dashboard Cite

show abstract

“…On the other side of the substrate, a full ground plane was selected for better radiation, efficiency, and gain performance. In addition, the full ground plane is preferred in antenna designs that tend to be used in healthcare applications [36]. Besides, it isolates the antenna from the body and reduces the impact on the performance of the antenna when the user places it on the human body.…”

Section: Antenna Designmentioning

confidence: 99%

Triple-Band Metamaterial Inspired Antenna for Future Terahertz (THz) Applications

Ashyap¹,

Alamri²,

Dahlan³

et al. 2022

Computers, Materials &Amp; Continua

Self Cite

View full text Add to dashboard Cite

For future healthcare in the terahertz (THz) band, a triple-band microstrip planar antenna integrated with metamaterial (MTM) based on a polyimide substrate is presented. The frequencies of operation are 500, 600, and 880 GHz. The triple-band capability is accomplished by etching metamaterial on the patch without affecting the overall antenna size. Instead of a partial ground plane, a full ground plane is used as a buffer to shield the body from back radiation emitted by the antenna. The overall dimension of the proposed antenna is 484 × 484 μm 2 . The antenna's performance is investigated based on different crucial factors, and excellent results are demonstrated. The gain for the frequencies 500, 600, 880 GHz is 6.41, 6.77, 10.1 dB, respectively while the efficiency for the same frequencies is 90%, 95%, 96%, respectively. Further research has been conducted by mounting the presented antenna on a single phantom layer with varying dielectric constants. The results show that the design works equally well with and without the phantom model, in contrast to a partially ground antenna, whose performance is influenced by the presence of the phantom model. As a result, the presented antenna could be helpful for future healthcare applications in the THz band.

show abstract

“…The safety limit should not be greater than 1.6 W/kg over 1 g of tissue. The SAR values were taken at 3.5 GHz and 9.5 GHz based on IEEE C95.1 with an input power of 100 mW [17][18][19][20]. The results are depicted in Figure 5 and Figure 6.…”

Section: Performance Of the Uwb Antenna On Bodymentioning

confidence: 99%

Planar Monopole UWB Antenna for Microwave Medical Image System

Ashyap¹,

Abidin²,

Dahlan³

et al. 2022

Proceedings of 2nd International Multi-Disciplinary Conference Theme: Integrated Sciences and Technologies, IMDC-IST 2021, 7-9

View full text Add to dashboard Cite

A planar monopole UWB antenna for microwave medical imaging systems is presented, and its operating frequency range from 3.09 GHz to 10.65 GHz. The overall size of the design is 30×20×1.6 mm 3 . Two phantom models were developed to represent the arm and breast models to evaluate the design performance in terms of reflection coefficient, SAR, directivity and efficiency. The results showed that even with the phantom models, UWB bandwidth is still maintained. The directivity and efficiency of the design with and without the phantom models were studied, and its good performance was proved. The specific absorption rate (SAR) was also investigated, and it showed a value far below the safety limit. Therefore, the planar monopole UWB antenna is very suitable for microwave medical imaging systems.

show abstract

A wearable antenna based on fabric materials with circular polarization for Body-centric wireless communications

Cited by 10 publications

References 24 publications

Multi-Band Metamaterial Antenna for Terahertz Applications

Multi-Band Metamaterial Antenna for Terahertz Applications

Triple-Band Metamaterial Inspired Antenna for Future Terahertz (THz) Applications

Planar Monopole UWB Antenna for Microwave Medical Image System

Contact Info

Product

Resources

About