Dual-resonant Π-shape with double L-strips PIFA for implantable biotelemetry

Lee, C.-M.; Yo, Tzong Chee; Huang, Fu-Jhuan; Luo, Ching Hsing

doi:10.1049/el:20081235

Cited by 68 publications

(38 citation statements)

References 3 publications

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“…PIFA antennas have been proposed for implantable medical devices [3][4][5][6][7][8][9][10][11][12][13][14][15]. Spiral-type radiators are usually applied to reduce the total antenna size.…”

Section: Methods and Simulation Setupmentioning

confidence: 99%

“…In recent years, much work has been performed on the design and characterization of implantable antennas [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. In general, the design of the antennas takes into consideration specific single tissues and they are tested using tissue-equivalent liquids [3][4][5][6][7][8][9][10], mimicking gels [11,12] and animals [13].…”

Section: Introductionmentioning

confidence: 99%

“…In general, the design of the antennas takes into consideration specific single tissues and they are tested using tissue-equivalent liquids [3][4][5][6][7][8][9][10], mimicking gels [11,12] and animals [13]. To date, detuning analysis has been limited to evaluating the resonance response of the proposed antennas implanted in fluids that simulate single biological tissues [14,15].…”

Section: Introductionmentioning

confidence: 99%

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Detuning Study of Implantable Antennas Inside the Human Body

Vidal¹,

Curto²,

López-Villegas³

et al. 2012

PIER

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Abstract-This study quantifies the detuning and impedance mismatch of antennas implanted inside the human body. Maximum frequency shifts caused by variations in the electrical properties of body tissues and different anatomical distributions were derived. The results are relevant to the design of implantable antennas. They indicate the bandwidth enhancement and initial tuning necessary for correct functioning. The study was carried out using electromagnetic modeling based on the finite-difference time-domain method and highresolution anatomical models. Four anatomical computer models of two adults and two children were used. The implanted antennas operated in the Medical Implant Communication Service band. The most important detuning and impedance mismatch was found for subcutaneous locations and in areas where a layer of fat tissue was present. The maximum frequency shift towards higher frequencies was 70 MHz. The frequency shift did not occur symmetrically around 403 MHz, but was shifted towards higher frequencies.

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“…PIFA antennas have been proposed for implantable medical devices [3][4][5][6][7][8][9][10][11][12][13][14][15]. Spiral-type radiators are usually applied to reduce the total antenna size.…”

Section: Methods and Simulation Setupmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Detuning Study of Implantable Antennas Inside the Human Body

Vidal¹,

Curto²,

López-Villegas³

et al. 2012

PIER

View full text Add to dashboard Cite

show abstract

“…Various types of implantable antennas such as planer inverted-F antenna (PIFA) [3,4], helical antennas [5], loop antennas [6], slot antennas [7] have also been proposed. In [8,9], multilayer configurations are used to reduce the antenna size.…”

Section: Introductionmentioning

confidence: 99%

A Circularly Polarised Implantable Monopole Antenna for Biomedical Applications

Saha¹,

Mitra²,

Parui³

2018

PIER C

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Abstract-In this paper, a compact, circularly polarized printed monopole antenna is proposed at ISM band (2.4-2.48 GHz) for biotelemetry and implantable applications. The proposed antenna possesses a small dimension (10 × 10 × 0.3 mm 3 ) and simple microstrip feeding structure. The circular polarization is easily achieved by introducing an "L" shape stub at the ground plane in ISM. The simulated 10 dB impedance bandwidth is around 13.87%, and 3 dB AR bandwidth is around 5.3%. The effect of different body phantoms is discussed to evaluate the sensitivity of the proposed antenna. The simulated peak gain of the proposed antenna is about −7.79 dBi across the operating band. The SAR analysis of the antenna configuration has also been studied.

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“…Most of the previous investigations on implanted antenna designs such as: micro-strip and Planar Inverted-F Antenna (PIFA) [6][7][8][9][10][11], cavity slot antenna [12][13][14][15] and dipole or monopole antennas [16][17][18] suffer from two main problems: high value of SAR at small antenna size and detuning effects due to the dielectric properties of the human body tissues. An electrically coupled loop antenna (ECLA) is proposed in this paper to tackle all the above issues.…”

Section: Introductionmentioning

confidence: 99%

Performance of an Implanted Electrically Coupled Loop Antenna Inside Human Body

Ibraheem¹,

Manteghi²

2014

PIER

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Abstract-Implanted antennas are widely used in hyperthermia and biomedical applications. The antenna needs to be extremely small while maintaining a permissible Specific Absorption Rate (SAR) and being able to cope with the detuning effects due to the dielectric properties of human body tissues. Most of the proposed antennas for implanted applications are electric field antennas such as Planner Inverted-F Antennas (PIFA) and micro-strip patch antennas. By minimizing the size of an electric field antenna, the near zone electric field will increase, resulting in higher SAR. This work is devoted to design a miniaturized magnetic field antenna to overcome the above limitations. The proposed electrically coupled loop antenna (ECLA) has high magnetic field and low electric field in the near zone and therefore, has a small SAR and is less sensitive to detuning effects. ECLA is designed at the Medical Implanted Communication Service (MICS) band with dimensions of (5×5×3 mm 3 ). ECLA has been simulated inside one-layer human body model, three-layer spherical human head model, human head and human body. From the simulation results, ECLA inside the human body has a 5 MHz-3 dB bandwidth, −14 dB gain, and radiation efficiency of 0.525%. The 1 g average SAR inside the human body for 10 mW input power is about 1 W/kg which is 7 times lower than the SAR for a patch antenna of the same size with the same accepted power.

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Dual-resonant Π-shape with double L-strips PIFA for implantable biotelemetry

Cited by 68 publications

References 3 publications

Detuning Study of Implantable Antennas Inside the Human Body

Detuning Study of Implantable Antennas Inside the Human Body

A Circularly Polarised Implantable Monopole Antenna for Biomedical Applications

Performance of an Implanted Electrically Coupled Loop Antenna Inside Human Body

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