Miniaturization of dual band implantable antennas

Hashemi, Soheil; Rashed-Mohassel, J.

doi:10.1002/mop.30207

Cited by 10 publications

(5 citation statements)

References 11 publications

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“…Alternatively, if the antenna size is reduced, the resonant frequency of the antenna will move to a higher band and vice versa. Higher frequencies with a wide bandwidth are also desirable for better data communication [35]. However, they suffer from higher tissue attenuation and loss compared to lower frequencies, which affect the overall in-body antenna performance by inducing more losses [36].…”

Section: High Frequency Bandmentioning

confidence: 99%

A Comprehensive Review of In-Body Biomedical Antennas: Design, Challenges and Applications

2023

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In-body biomedical devices (IBBDs) are receiving significant attention in the discovery of solutions to complex medical conditions. Biomedical devices, which can be ingested, injected or implanted in the human body, have made it viable to screen the physiological signs of a patient wirelessly, without regular hospital appointments and routine check-ups, where the antenna is a mandatory element for transferring bio-data from the IBBDs to the external world. However, the design of an in-body antenna is challenging due to the dispersion of the dielectric constant of the tissues and unpredictability of the organ structures of the human body, which can absorb most of the antenna radiation. Therefore, various factors must be considered for an in-body antenna, such as miniaturization, link budget, patient safety, biocompatibility, low power consumption and the ability to work effectively within acceptable medical frequency bands. This paper presents a comprehensive overview of the major facets associated with the design and challenges of in-body antennas. The review comprises surveying the design specifications and implementation methodology, simulation software and testing of in-body biomedical antennas. This work aims to summarize the recent in-body antenna innovations for biomedical applications and indicates the key research challenges.

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Section: High Frequency Bandmentioning

confidence: 99%

A Comprehensive Review of In-Body Biomedical Antennas: Design, Challenges and Applications

2023

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“…Recently, various techniques such as periodic structures [12], split ring resonator [13], and lengthening the current path [14] were developed by various researchers for the miniaturization of an implantable antenna. In this study, the volume of the proposed ultra-wideband antenna was confined to 9.8 mm 3 by introducing open-ended cuts in the patch, and also in the ground plane.…”

Section: Introductionmentioning

confidence: 99%

An Ultra-Miniaturized Antenna With Ultra-Wide Bandwidth Characteristics for Medical Implant Systems

et al. 2021

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In this study, an ultra-miniaturized implantable antenna based system with ultra-wideband characteristics in the industrial, scientific, and medical band (i.e., 2.4-2.48 GHz) is proposed for biomedical applications. A biocompatible and flexible liquid crystalline polymer material, Rogers ULTRALAM (tanδ = 0.0025 and ε r = 2.9), is employed as both the substrate and superstrate. The proposed antenna with a compact size (7 × 7 × 0.2 mm 3) and a wide bandwidth (1533 MHz), was primarily designed for overcoming the detuning challenges that may occur owing to the electronic circuitry and irregularity as well as inhomogeneity of the human tissue environment. The miniaturization of this antenna was achieved by introducing a shorting pin and open-ended cuts in the ground plane, as well as in the radiating patch. The proposed antenna also yielded a higher gain and lower specific absorption rate (SAR). Through the link budget analysis, it was observed that 1 Mbps of data could be easily transmitted over a distance of 15 m. The simulated and in vitro measured results confirmed that compared to the recently reported antenna systems, our proposed ultra-wideband antenna based system could work more efficiently in the complex environment of the human body, thus establishing itself as an attractive candidate for biomedical applications.

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“…A dual‐band implantable antenna design based on serpentine patch elements was investigated in Reference 1 to achieve size reduction. For the same purpose, two new meander types of miniature dual‐band implantable antenna designs were discussed in Reference 9. Besides, a dual‐band miniaturized implantable antenna with differential feed was introduced in Reference 10.…”

Section: Introductionmentioning

confidence: 99%

An SRR based miniature implantable antenna with a slit loaded ground at MedRadio and ISM bands for biotelemetry applications

Yamac

Basaran

2020

Int J RF Microw Comput Aided Eng

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A miniaturized implantable microstrip split-ring antenna (IMSRA) is proposed for wireless biotelemetry. The IMSRA takes up a miniaturized volume of 153.35 mm 3 (10.5 × 11.5 × 1.27) and provides a dual-band operation in 360 to 620 MHz and 2.32 to 2.54 GHz that covers The Medical Device Radiocommunications Service (MedRadio) (401-406 MHz) and Industrial, Scientific, and Medical (ISM) (433-434 MHz and 2.4-2.48 GHz) bands. The principal part of the radiator consists of three homocentric split-ring elements. In addition, three conductor paths located between the split rings are used for precise adjustment of the frequency. In order to reduce the antenna size, a shorting pin is appropriately inserted between one of the metallic rings and the ground plane. The impedance matching of the antenna is improved by the use of a hook-shaped slit placed on the ground plane. For verification of the in vivo operation, the proposed IMSRA was measured in two separate skin-mimicking gels for MedRadio and ISM bands. A prototype was also tested in the skin tissue sample of a donor rat. The proposed antenna offers 53% (360 620 MHz) bandwidth at 490 MHz and 9% (2.32 2.54 GHz) bandwidth at 2.43 GHz. The IMSRA exhibits well-behaved radiation patterns and SAR values at the respective bands.

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Miniaturization of dual band implantable antennas

Cited by 10 publications

References 11 publications

A Comprehensive Review of In-Body Biomedical Antennas: Design, Challenges and Applications

A Comprehensive Review of In-Body Biomedical Antennas: Design, Challenges and Applications

An Ultra-Miniaturized Antenna With Ultra-Wide Bandwidth Characteristics for Medical Implant Systems

An SRR based miniature implantable antenna with a slit loaded ground at MedRadio and ISM bands for biotelemetry applications

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