Miniaturized Dual-Antenna System for Implantable Biotelemetry Application

Singh, Moirangthem Santoshkumar; Ghosh, Jeet; Ghosh, Soumendu; Sarkhel, Abhishek

doi:10.1109/lawp.2021.3081477

Cited by 36 publications

(14 citation statements)

References 33 publications

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“…In order to overcome this problem, the MIMO antenna concept has been introduced to enhance the spectral efficiency and increases the data rate. Authors in a previous study, 18 developed pin loaded dual antenna with two port MIMO system. The reported antenna achieved mutual coupling reduction of around −37 dB with the help of neutralized line (NL) and defective ground structure.…”

Section: Introductionmentioning

confidence: 99%

A novel wideband fractal‐shaped MIMO antenna for brain and skin implantable biomedical applications

Kangeyan

Karthikeyan

2023

Int J Communication

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Summary A novel fractal‐shaped wideband multiple‐input multiple‐output (MIMO) antenna is proposed for brain and skin implantable applications. This antenna works in the 2.4–2.48 GHz band of industrial, scientific, and medical (ISM) standards. The fractal‐shaped wideband MIMO antenna is miniature in size with a footprint of 0.25em0.13normalλ×0.06normalλ×0.01normalλ. Rogers RT/Duroid 6010 high‐dielectric substrate material is used to fabricate the optimized design in order to validate the implantable MIMO antenna structure. The same high‐permittivity substrate material has been used as a superstrate. Experiments were carried out in brain and skin‐mimicking gel at 2.45 GHz in the ISM band. The proposed antenna has a peak gain of −21.3 dBi at 2.45 GHz. High isolation (>20 dB) between two MIMO ports is attained. The proposed antenna achieves a fractional bandwidth of 36.76% and an impedance bandwidth of 1.02 GHz. According to IEEE safety regulations for 1‐ and 10‐g tissues, the computed maximum specific absorption rate (SAR) is safe bound.

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Section: Introductionmentioning

confidence: 99%

A novel wideband fractal‐shaped MIMO antenna for brain and skin implantable biomedical applications

Kangeyan

Karthikeyan

2023

Int J Communication

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“…Human phantoms can be smashed by the antenna operation at the working frequency. Furthermore, the antenna should have a wide bandwidth to cover the required frequency range despite the impact of surrounding human tissue [5]. The manylayers structure of the human body causes the antenna's radiation characteristics to shift frequency.…”

Section: Introductionmentioning

confidence: 99%

A Wideband Bear-Shaped Compact Size Implantable Antenna for In-Body Communications

et al. 2022

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Biomedical implantable antennas play a vital role in medical telemetry applications. These types of biomedical implantable devices are very helpful in improving and monitoring patients’ living situations on a daily basis. In the present paper, a miniaturized footprint, thin-profile bear-shaped in-body antenna operational at 915 MHz in the industrial, scientific, and medical (ISM) band is proposed. The design is a straightforward bear-shaped truncated patch excited by a 50-Ω coaxial probe. The radiator is made up of two circular slots and one rectangular slot at the feet of the patch, and the ground plane is sotted to achieve a broadsided directional radiation pattern, imprinted on a Duroid RT5880 roger substrate with a typical 0.254-mm thickness (= 2.2, tan = 0.0009). The stated antenna has a complete size of 7 mm × 7 mm × 0.254 mm and, in terms of guided wavelength, of 0.027 × 0.027 × 0.0011. When operating inside skin tissues, the antenna covers a measured bandwidth from 0.86 GHz to 1.08 GHz (220 MHz). The simulations and experimental outcomes of the stated design are in proper contract. The obtained results show that the calculated specific absorption rate (SAR) values inside skin of over 1 g of mass tissue is 8.22 W/kg. The stated SAR values are lower than the limitations of the federal communications commission (FCC). Thus, the proposed miniaturized antenna is an ultimate applicant for in-body communications

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“…Therefore, during the design stages, the antenna must be compatible and exible along with the human body. Human body tissues can interfere with the operating frequency which can damage the tissues, that's why the antenna should have broader bandwidth that can cover the required frequency band after being tested on human tissues 5 . The radiation properties of the CP antenna change rapidly due to the multiple layer structure of the human body.…”

Section: Introductionmentioning

confidence: 99%

A Flexible Broadband CPW-Fed Circularly Polarized Biomedical Implantable Antenna With Enhanced Axial Ratio Bandwidth

Ahmad

Manzoor

Naseer

et al. 2021

Preprint

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Implantable antennas have a vital role in biomedical telemetry applications. Therefore, a compact low-profile circularly polarized biomedical implantable antenna operational in industrial, scientific, and medical (ISM) band at 2.45 GHz is reported. The presented antenna is fed by a modified co-planar waveguide (CPW) technique to keep the size of the antenna compact. The radiating monopole consists of a slotted rectangular patch with one slot at an angle of 45 degree and truncated small patch on the left end of the CPW ground plane to make the antenna circularly polarized at the required frequency band. A flexible Roger Duroid RT5880 substrate (εr = 2.2, tanδ = 0.0009) with the standard thickness of 0.254 mm is used to achieve bending abilities. The complete volume of the designed antenna is 21 mm × 13.5 mm × 0.254 mm (0.25 × 0.16 × 0.003 ). The antenna covers the bandwidth from 2.35-2.55 GHz (200 MHz) in free space while from 1.63 GHz to 2.8 GHz (1.17 GHz) inside skin tissue. As the designed antenna is operational in skin tissue with larger bandwidth, the bending analysis along the (x & y)-axis is also analyzed through the simulation. A good agreement between the simulation and measurements of the bended antenna is observed. The measured -10dB impedance bandwidth and the 3dB axial ratio (AR) bandwidth inside skin-mimicking gel are 47.7% and 53.8%, respectively at 2.45 GHz frequency band. Finally, the specific absorption rate (SAR) values are also analyzed through simulations, and it is 0.78 W/kg inside skin over 1 g of mass tissue. The proposed SAR values are less than the limit of the federal communication commission (FCC). This antenna is miniaturized and an ideal applicant for the biomedical implantable applications.

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Miniaturized Dual-Antenna System for Implantable Biotelemetry Application

Cited by 36 publications

References 33 publications

A novel wideband fractal‐shaped MIMO antenna for brain and skin implantable biomedical applications

A novel wideband fractal‐shaped MIMO antenna for brain and skin implantable biomedical applications

A Wideband Bear-Shaped Compact Size Implantable Antenna for In-Body Communications

A Flexible Broadband CPW-Fed Circularly Polarized Biomedical Implantable Antenna With Enhanced Axial Ratio Bandwidth

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