Hilbert curve inspired miniaturized MIMO antenna for wireless capsule endoscopy

Biswas, Balaka; Karmakar, Ayan; Chandra, Vikash

doi:10.1016/j.aeue.2021.153819

Cited by 18 publications

(7 citation statements)

References 20 publications

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“…The Hilbert curves have been exploited in antenna design to shrink antenna dimensions and to address multiple frequency bands 16 . Hilbert antennas may be in the form of dipoles 17 or loops 18 . We've designed Hilbert Loop antennas as the radiation efficiency is higher for the loop than for the dipole and also because of the fact that a loop antenna is less sensitive to permittivity changes than the dipole antenna 19 …”

Section: Antenna Designmentioning

confidence: 99%

“…16 Hilbert antennas may be in the form of dipoles 17 or loops. 18 We've designed Hilbert Loop antennas as the radiation efficiency is higher for the loop than for the dipole and also because of the fact that a loop antenna is less sensitive to permittivity changes than the dipole antenna. 19 Figure 1 illustrates a third-order Hilbert loop antenna, whose dimensions (given in the caption of Figure 1) are compatible with the side surface of a capsule endoscope unit having a diameter of 11 mm and a height of 26 mm.…”

Section: Antenna Designmentioning

confidence: 99%

See 1 more Smart Citation

Wideband and dual‐polarized Twin Hilbert curve antennas for capsule endoscopy

Güreş

Kılınç

Shayea

et al. 2022

Micro & Optical Tech Letters

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In this study, we design a pair of third‐order conformal Hilbert curve antennas for use in capsule endoscopy at three different bands (Industrial, Scientific, and Medical [ISM]), especially at 433 MHz, 915 MHz, and 2.45 GHz. The antennas are placed orthogonally with respect to each other, offering dual linear polarization characteristics, which have been highlighted in literature as the most robust communication link between a roaming transmitting capsule within the GI tract and the receiver antenna. The robustness of the link depends on (i) invariance of linear polarization with the position and orientation of the roaming transmitter, as well as (ii) tolerance of linearly polarized fields to depolarization effects when penetrated through the body. The antennas were manufactured on polyimide substrate, which was wrapped around a 3D‐printed capsule volume. Both antennas were measured inside bovine muscle tissue and the obtained results have been compared with the simulated results to validate the performance of the propose solution. The presented results showed that, the return loss characteristics and the measured bandwidth, for both antennas inside bovine muscle tissue, have matched with the simulated results. To the best of our knowledge, these demonstrated antennas are the first designed capsule antennas to address three ISM bands with dual linear polarization. The designed antennas can be adapted for clinical use with further development.

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Section: Antenna Designmentioning

confidence: 99%

Section: Antenna Designmentioning

confidence: 99%

Wideband and dual‐polarized Twin Hilbert curve antennas for capsule endoscopy

Güreş

Kılınç

Shayea

et al. 2022

Micro & Optical Tech Letters

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“…Various types of fractals are being used for this purpose, like-Minkwoski, Hilbert curve type, etc. [20,21,31]. A10 × 10 mm 2 fractal UWB omni-directional microstrip patch antenna (MPA) which is pentagonal in structure with star-shaped slots inside the patch was proposed by Nizar Hammed et al [19].…”

Section: Antenna Architecturesmentioning

confidence: 99%

The quest for a miniaturized antenna in the wireless capsule endoscopy application: a review

Gayen

Biswas

Karmakar³

2021

Int. J. Microw. Wireless Technol.

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This review paper explores the potential use of the planar miniaturized antenna for wireless capsule endoscopy application: one of the promising fields in the current era. The paper highlights the design strategy, various optimization techniques with respect to system realization, material compatibility issues and finally the mandatory EM radiation effect analysis for the said application. It compares amongst various currently reported structures in context with different performance metrics. Inherent challenges of this emerging field of bio-medical engineering have also been detailed here along with futuristic approaches for enhancing the throughput.

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“…The antenna had dimensions of 13.5 × 13.5× 0.13 mm 3 and offered an isolation of 32 dB. Other works, such as [26]- [28], have also presented MIMO implantable antennas for various single-band biotelemetry applications. All previous MIMO implantable antenna designs only support operation in one frequency band; however, a multiband operation is preferable for multifunctional implantable medical devices that require multiple frequencies for tasks, for instance, wireless charging plus waking up [10].…”

Section: Introductionmentioning

confidence: 99%

Dual-Band Two-Port MIMO Antenna for Biomedical Deep Tissue Communication: Design, Characterization, and Performance Analysis

Shah,

Zada,

Nasir

et al. 2023

IEEE Access

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The demand for wireless communication in biomedical applications is increasing, thereby necessitating the development of reliable and efficient communication systems that can operate within the human body. This study introduces a novel dual-band two-port multiple-input multiple-output (MIMO) implantable antenna for deep tissue purposes with an overall size of 10.8 × 5.6 × 0.254 mm 3 = 15.3 mm 3 . The proposed MIMO antenna operates in the 915 and 2450 MHz industrial scientific medical bands with a measured bandwidth of 82.5, 148.5 MHz (port 1) and 130, 89 MHz (port 2), in addition peak realized gains of -32.15 and -22.2 dBi, respectively, are observed. High-measured port isolation (over 20 dB and 30 dB at 915 and 2450 MHz bands, respectively) was accomplished by means of meandered resonators. The determined specific absorption rate was within the safe limits. The MIMO performance factors, for instance, the envelope correlation coefficient and diversity gain, were also evaluated and determined to be in the acceptable range. According to our knowledge, this is the first dual-band implantable MIMO antenna developed for biomedical applications. The results from the simulations and measurements indicate that the developed antenna holds great promise for enabling effective communication within the human body for biomedical applications.

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Hilbert curve inspired miniaturized MIMO antenna for wireless capsule endoscopy

Cited by 18 publications

References 20 publications

Wideband and dual‐polarized Twin Hilbert curve antennas for capsule endoscopy

Wideband and dual‐polarized Twin Hilbert curve antennas for capsule endoscopy

The quest for a miniaturized antenna in the wireless capsule endoscopy application: a review

Dual-Band Two-Port MIMO Antenna for Biomedical Deep Tissue Communication: Design, Characterization, and Performance Analysis

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