Capacitively Loaded Circularly Polarized Implantable Patch Antenna for ISM Band Biomedical Applications

Liu, Changrong; Guo, Yong‐Xin; Xiao, Shaoqiu

doi:10.1109/tap.2014.2307341

Cited by 246 publications

(124 citation statements)

References 42 publications

Supporting

Mentioning

122

Contrasting

Order By: Relevance

“…(1) that a higher dielectric constant and/or higher conductivity would result in higher attenuation constant, which explains the lower gain characteristics when the vitreous humor was implemented. It was shown in previous studies that the superstrate layer is advantageous in terms of antenna gain [20]. It can be observed from Figure 9b that the antenna can give omnidirectional characteristics for both LHCP and RHCP with stable radiation patterns.…”

Section: Simulation Resultsmentioning

confidence: 65%

Circularly polarized implantable antenna characterization for retinal prosthesis systems

Kaka¹,

Toycan²,

Walker³

2018

Turk J Elec Eng & Comp Sci

View full text Add to dashboard Cite

Abstract:We describe a miniaturized antenna design for retinal prosthesis applications that enhances data transfer between the implant and external camera. The circularly polarized and conformal 2.4-2.48 GHz microstrip patch antenna was simulated inside the vitreous humor and is intended for biomedical applications. Modified Hilbert and serpentine geometries were used for the proposed implant antenna design. Capacitive radiator loading offered miniaturized dimensions of 5.8 × 6.5 × 2 mm 3 (width × height × thickness mm 3 ) . A truncated design enhanced the intrinsic circular polarization characteristics to > 3 dB axial ratio. Polydimethylsiloxane substrate and superstrate materials were used to achieve an S 11 value below -15 dB across the frequency range with biocompatible characteristics. The simulated peak gains for left-hand circular polarization and right-hand circular polarization at 2.45 GHz were -50 dBi and -60 dBi, respectively. These relatively small values were due to the high conductivity of the vitreous humor ( σ = 1.53 S/m), which imposed significant losses. Overall, the proposed antenna had an omnidirectional radiation pattern and + 8.45 dBm input to meet the specific absorption rate regulation limit.

show abstract

Section: Simulation Resultsmentioning

confidence: 65%

Circularly polarized implantable antenna characterization for retinal prosthesis systems

Kaka¹,

Toycan²,

Walker³

2018

Turk J Elec Eng & Comp Sci

View full text Add to dashboard Cite

show abstract

“…The volume of the reported antennas in the prior part is larger than our proposed one. In addition, our work exhibits the highest peak gain with better impedance bandwidth than [11,13,14,20] and larger AR bandwidth than others [11,14,20]. It is also observed that the SAR (W/Kg) of the proposed antenna is quite good and has an acceptable value.…”

Section: Experimental Verificationmentioning

confidence: 55%

“…However, designing a CP implantable antenna is a very challenging job as good circular polarization must be realized with limited size overcoming its inherent constraint of limited bandwidth [10]. Several works have been reported to achieve a single fed CP implantable antenna with sufficient AR bandwidth [11,12,[13][14][15]. In most of the cases coaxial feeding structure has been used for implantable CP antennas.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Circularly Polarised Implantable Monopole Antenna for Biomedical Applications

Saha¹,

Mitra²,

Parui³

2018

PIER C

View full text Add to dashboard Cite

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.

show abstract

“…In this condition, an implantable antenna with circular polarization is desired. In [20], a compact implantable CP microstrip patch antenna is proposed to operate in 2.4 GHz ISM band. The top view snapshot of the fabricated antenna in [20] is shown in Fig.…”

Section: Circularly Polarized Implantable Antennasmentioning

confidence: 99%

Modeling and design of wireless data telemetry and power transfer for biomedical implants

Agarwal

Jegadeesan²,

Guo

et al. 2015

2015 IEEE International Conference on Computational Electromagnetics

Self Cite

View full text Add to dashboard Cite

This paper briefly discusses the modeling and design processes of various implantable miniaturized antennas and coils proposed by our research group for wireless data telemetry and power transfer for implants. Methods to overcome practical design issues in implants are proposed whilst adhering to the standard safety regulations.Index Terms -biomedical implant, compact antenna, implantable antenna, data telemetry, power transfer, wireless.

show abstract

Capacitively Loaded Circularly Polarized Implantable Patch Antenna for ISM Band Biomedical Applications

Cited by 246 publications

References 42 publications

Circularly polarized implantable antenna characterization for retinal prosthesis systems

Circularly polarized implantable antenna characterization for retinal prosthesis systems

A Circularly Polarised Implantable Monopole Antenna for Biomedical Applications

Modeling and design of wireless data telemetry and power transfer for biomedical implants

Contact Info

Product

Resources

About