A Miniaturized Circularly Polarized Implantable Annular-Ring Antenna

Li, Rongqiang; Guo, Yong‐Xin; Zhang, Bing; Du, Gonghuan

doi:10.1109/lawp.2017.2734246

Cited by 70 publications

(44 citation statements)

References 16 publications

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“…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: 56%

“…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%

“…AR (Axial Ratio) bandwidth of 18.2% was achieved for RHCP and LHCP configurations using shorting pins, truncated center square slot and slits, and the broadband impedance and AR features have been achieved in the implantable patch antenna [13] operating at the 2.4 GHz ISM band. The radiating element of the antenna in [14] consists of an annular ring and a central circular patch. The circular polarization is generated by adding a pair of open stubs in the inner boundary of the annular ring.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Experimental Verificationmentioning

confidence: 56%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Circularly Polarised Implantable Monopole Antenna for Biomedical Applications

Saha¹,

Mitra²,

Parui³

2018

PIER C

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“…In these applications, MICS band is used for transmission of biological findings, while the ISM band is primarily used to send a wake up signal for reduction of power consumption . When the literature is examined, it is seen that most of the implantable antenna designs, which meet the requirements mentioned above, operate in only either the MICS or ISM band . In addition, dual‐band and multiband implantable antennas with various structures have been recently proposed for both the MICS and ISM bands of biotelemetry applications.…”

Section: Introductionmentioning

confidence: 99%

“…2 When the literature is examined, it is seen that most of the implantable antenna designs, which meet the requirements mentioned above, operate in only either the MICS [3][4][5] or ISM band. [6][7][8] In addition, dual-band and multiband implantable antennas with various structures have been recently proposed for both the MICS and ISM bands of biotelemetry applications. In this context, an electrically coupled loop and a planar low profile antenna designs exhibiting low SAR values were presented in References 9 and 10, respectively.…”

Section: Introductionmentioning

confidence: 99%

Compact implantable antenna design for MICS and ISM band biotelemetry applications

Usluer

Cetindere

Basaran

2019

Micro & Optical Tech Letters

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A dual‐band implantable complementary split‐ring (CSR) antenna is proposed for Medical Implant Communication Services (MICS) and Industrial Scientific and Medical (ISM) bands biotelemetry applications. The proposed antenna is printed on a grounded RO3010 substrate and the total size of the compact design is only 14 × 14 × 1.27 mm3. The metallic top layer of the antenna is composed of three homocentric rectangular CSR elements and slots inserted between the rings. While the slots are used for fine frequency tuning, a shorting pin appropriately placed between the top copper radiator and the ground plane is utilized for miniaturization purpose. In order to improve impedance matching and enhance bandwidths of the antenna, we employ a hook‐shaped slot in the ground plane. The proposed implantable CSR antenna (ICSRA) is fed by a coaxial probe. The proposed ICSRA was fabricated and measured in two different gels mimicking the real human skin tissue at the MICS and ISM bands. Also, a prototype of ICSRA was measured in a real skin sample obtained from a donor rat for in vivo verification. The ICSRA provides 23.5% bandwidth at 460 MHz and 12% bandwidth at 2.34 GHz and it exhibits acceptable radiation pattern characteristics at the respective bands. The specific absorption rate values of the antenna satisfy the limits set by standard safety guidelines.

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Wireless Wearables and Implants: A Dosimetry Review

Guido

Kiourti

2019

Bioelectromagnetics

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Wireless wearable and implantable devices are continuing to grow in popularity, and as this growth occurs, so too does the need to consider the safety of such devices. Wearable and implantable devices require the transmitting and receiving of electromagnetic waves near and through the body, which at high enough exposure levels may damage proximate tissues. The specific absorption rate (SAR) is the quantity commonly used to enumerate exposure levels, and various national and international organizations have defined regulations limiting exposure to ensure safe operation. In this paper, we comprehensively review dosimetric studies reported in the literature up to the year 2019 for wearables and implants. We discuss antenna designs for wearables and implants as they relate to SAR values and field and thermal distributions in tissue, present designs that have made steps to reduce SAR, and then review SAR considerations as they relate to applied devices. As compared with previous review papers, this paper is the first review to focus on dosimetry aspects relative to wearable and implantable devices. Bioelectromagnetics. 2020;41:3–20 © 2019 The Authors. Bioelectromagnetics published by Wiley Periodicals, Inc.

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A Miniaturized Circularly Polarized Implantable Annular-Ring Antenna

Cited by 70 publications

References 16 publications

A Circularly Polarised Implantable Monopole Antenna for Biomedical Applications

A Circularly Polarised Implantable Monopole Antenna for Biomedical Applications

Compact implantable antenna design for MICS and ISM band biotelemetry applications

Wireless Wearables and Implants: A Dosimetry Review

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