Preparation of a Human Skin-Mimicking Gels for in Vitro Measurements of the Dual-Band Medical Implant Antenna

Doğancı, Erdinç; Uçar, Mehmet; Sondaş, Adnan

doi:10.18596/jotcsa.72855

Cited by 5 publications

(4 citation statements)

References 24 publications

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“…A CPW-fed split-ring-resonator (SRR) = based implantable antenna for medical telemetry applications was shown in another work [22,23]. The antenna's overall area was claimed to be 2422 mm 2 , and the flexible substrate was Polyimide with a thickness of 0.07 mm.…”

Section: Introductionmentioning

confidence: 99%

A Wideband Bear-Shaped Compact Size Implantable Antenna for In-Body Communications

et al. 2022

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Biomedical implantable antennas play a vital role in medical telemetry applications. These types of biomedical implantable devices are very helpful in improving and monitoring patients’ living situations on a daily basis. In the present paper, a miniaturized footprint, thin-profile bear-shaped in-body antenna operational at 915 MHz in the industrial, scientific, and medical (ISM) band is proposed. The design is a straightforward bear-shaped truncated patch excited by a 50-Ω coaxial probe. The radiator is made up of two circular slots and one rectangular slot at the feet of the patch, and the ground plane is sotted to achieve a broadsided directional radiation pattern, imprinted on a Duroid RT5880 roger substrate with a typical 0.254-mm thickness (= 2.2, tan = 0.0009). The stated antenna has a complete size of 7 mm × 7 mm × 0.254 mm and, in terms of guided wavelength, of 0.027 × 0.027 × 0.0011. When operating inside skin tissues, the antenna covers a measured bandwidth from 0.86 GHz to 1.08 GHz (220 MHz). The simulations and experimental outcomes of the stated design are in proper contract. The obtained results show that the calculated specific absorption rate (SAR) values inside skin of over 1 g of mass tissue is 8.22 W/kg. The stated SAR values are lower than the limitations of the federal communications commission (FCC). Thus, the proposed miniaturized antenna is an ultimate applicant for in-body communications

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Section: Introductionmentioning

confidence: 99%

A Wideband Bear-Shaped Compact Size Implantable Antenna for In-Body Communications

et al. 2022

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“…Geliştirilen biyotelemetri sistemlerde kullanılan frekans bantları ise Uluslararası Telekominikasyon Birliği (International Telecommunication Union-ITU) ve Federal İletişim Komisyonu (Federal Communications Commission-FCC) tarafından atanan Tıbbi İmplant İletişim Hizmet Bandı (402-405 MHz) ve Sınai, bilimsel ve tıbbi cihaz (SBT) bandıdır (2.4-2.48 GHz). Hasta takibi amacıyla yapılan biyomedikal antenlerde daha önceki çalışmalarda yalnızca SBT bandında [4,[6][7][8][9][10]12,15,[18][19][20] ve yalnızca Tıbbi İmplant İletişim Hizmet bandında [5,21] tasarımlar yapılmasının yanı sıra her iki bantta da çalışabilen ikili bant antenler [13,14,16,17,22,23] de tasarlanmıştır. Ayrıca SBT bandında üçlü bant şeklinde tasarlanan bir çalışma da mevcuttur [24].…”

Section: Introductionunclassified

“…Kanserli doku teşhisi amacıyla da kullanılan biyomedikal uygulamalar da mevcuttur [7]. Biyomedikal antenin ölçümleri insan vücudunun dokularını taklit eden jeller içinde yapılmıştır [4,6,9,11,13,15,23,25].…”

Section: Introductionunclassified

Biyomedikal uygulamaları için vücut içi geniş bantlı İD-EDDK beslemeli SBT bant anten analizi

Ates¹,

Okan²,

Akcam³

2022

Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi

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Bu çalışmada biyomedikal uygulamalarında kullanılmak üzere SBT (Sınai Bilimsel ve Tıbbi cihaz bandı) bantta çalışan geniş bantlı bir anten tasarlanmıştır. Antenin maksimum boyutlarını gösteren 11 x 12 x 0.6 mm³ değerleri için Rogers-RO3210 (𝜀 𝑟 = 10.2) alltaş olarak belirlenmiştir. Bu alttaşın üzerine geleneksel dikdörtgen yama anten tasarlanıp içerisinden testere şeklinde bir yarık kazınmıştır. Tasarlanan antenin besleme tipi İD-EDDK (İletken Destekli Eş Düzlemsel Dalga Kılavuzu) olarak seçilmiş, toprak plakası azaltılarak kullanılmıştır. Antenin tasarımı ve analizleri CST-MWS programı kullanılarak yapılmıştır. Tasarlanan antenin empedans bant genişliği (𝑆 11 ≤-10 dB) 0.71 GHz (1.97-2.68 GHz) olarak ölçülmüştür. Merkezi rezonans frekansı 2.36 GHz olan antenin yansıma katsayısı grafiği SBT bandını kapsar. Vücut içi uygulamalara uygun olarak tasarlanan antenin eğimli koşullardaki sonuçları da düzlemsel koşullardaki sonuçlarına kıyasla çok yakın performans göstermektedir ve ÖSO (Özgül Soğurma Oran) değerleri insan vücudu için zararsızdır.

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“…A multilayered spiral antenna covering the medical implant communication system (MICS) and industrial, scientific, and medical (ISM) bands was reported for an implantable smart healthcare monitoring system [ 33 ]. Doğancı et al [ 34 ] and Ucar et al [ 35 ] reported the preparation of a human skin phantom to analyze the performance of implantable antennas for the implantable communication system. Many wireless sensors are built on standard communication protocols for implantable devices such as Bluetooth, WiFi, and ZigBee [ 36 , 37 ].…”

Section: Introductionmentioning

confidence: 99%

An Ex Vivo Study of Wireless Linkage Distance between Implantable LC Resonance Sensor and External Readout Coil

Farooq

Amin

Kraśny

et al. 2022

Sensors

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The wireless monitoring of key physiological parameters such as heart rate, respiratory rate, temperature, and pressure can aid in preventive healthcare, early diagnosis, and patient-tailored treatment. In wireless implantable sensors, the distance between the sensor and the reader device is prone to be influenced by the operating frequency, as well as by the medium between the sensor and the reader. This manuscript presents an ex vivo investigation of the wireless linkage between an implantable sensor and an external reader for medical applications. The sensor was designed and fabricated using a cost-effective and accessible fabrication process. The sensor is composed of a circular planar inductor (L) and a circular planar capacitor (C) to form an inductor–capacitor (LC) resonance tank circuit. The reader system comprises a readout coil and data acquisition instrumentation. To investigate the effect of biological medium on wireless linkage, the readout distance between the sensor and the readout coil was examined independently for porcine and ovine tissues. In the bench model, to mimic the bio-environment for the investigation, skin, muscle, and fat tissues were used. The relative magnitude of the reflection coefficient (S11) at the readout coil was used as a metric to benchmark wireless linkage. A readable linkage signal was observed on the readout coil when the sensor was held up to 2.5 cm under layers of skin, muscle, and fat tissue. To increase the remote readout distance of the LC sensor, the effect of the repeater coil was also investigated. The experimental results showed that the magnitude of the reflection coefficient signal was increased 3–3.5 times in the presence of the repeater coil, thereby increasing the signal-to-noise ratio of the detected signal. Therefore, the repeater coil between the sensor and the readout coil allows a larger sensing range for a variety of applications in implanted or sealed fields.

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Preparation of a Human Skin-Mimicking Gels for in Vitro Measurements of the Dual-Band Medical Implant Antenna

Cited by 5 publications

References 24 publications

A Wideband Bear-Shaped Compact Size Implantable Antenna for In-Body Communications

A Wideband Bear-Shaped Compact Size Implantable Antenna for In-Body Communications

Biyomedikal uygulamaları için vücut içi geniş bantlı İD-EDDK beslemeli SBT bant anten analizi

An Ex Vivo Study of Wireless Linkage Distance between Implantable LC Resonance Sensor and External Readout Coil

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