Performance of Electrically Coupled Loop Antenna inside human body at different frequency bands

Ibraheem, Ali; Manteghi, Majid

doi:10.1109/aps.2014.6904815

Cited by 6 publications

(5 citation statements)

References 4 publications

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“…However, to our knowledge, the significance of this work is that we examined the effect of a combination treatment with LDOX and IMH induced by a radiofrequency electromagnetic field, the magnetic component of which propagated through the biological media with lower distortion relative to its electric component, in Saos-2 cells for the first time. This was supported by [75], where the magnetic component of a single-turn loop applicator, similar to the applicator we used during IMH, propagated through human tissues with reduced distortion compared to the electric component. The present study supports the role of IMH in improving LDOX delivery and antitumor effects in Saos-2 cells (Figure 8d).…”

Section: Discussionmentioning

confidence: 70%

Combination Treatment with Liposomal Doxorubicin and Inductive Moderate Hyperthermia for Sarcoma Saos-2 Cells

Orel,

Diedkov,

Ostafiichuk

et al. 2024

Pharmaceuticals

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Despite efforts in osteosarcoma (OS) research, the role of inductive moderate hyperthermia (IMH) in delivering and enhancing the antitumor effect of liposomal doxorubicin formulations (LDOX) remains unresolved. This study investigated the effect of a combination treatment with LDOX and IMH on Saos-2 human OS cells. We compared cell viability using a trypan blue assay, apoptosis and reactive oxygen species (ROS) measured by flow cytometry and pro-apoptotic Bax protein expression examined by immunocytochemistry in response to IMH (42 MHz frequency, 15 W power for 30 min), LDOX (0.4 μg/mL), and LDOX plus IMH. The lower IC50 value of LDOX at 72 h indicated increased accumulation of the drug in the OS cells. LDOX plus IMH resulted in a 61% lower cell viability compared to no treatment. Moreover, IMH potentiated the LDOX action on the Saos-2 cells by promoting ROS production at temperatures of <42 °C. There was a 12% increase in cell populations undergoing early apoptosis with a less heterogeneous distribution of Bax after combination treatment compared to those treated with LDOX (p < 0.05). Therefore, we determined that IMH could enhance LDOX delivery and its antitumor effect via altered membrane permeabilization, ROS generation, and a lower level of visualized Bax heterogeneity in the Saos-2 cells, suggesting the potential translation of these findings into in vivo studies.

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Section: Discussionmentioning

confidence: 70%

Combination Treatment with Liposomal Doxorubicin and Inductive Moderate Hyperthermia for Sarcoma Saos-2 Cells

Orel,

Diedkov,

Ostafiichuk

et al. 2024

Pharmaceuticals

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“…It is hard to practically implement larger size antenna element in a smartphone. Loop antennas have the advantage of being insensitive to the degradation while in user's hand and have very small specific absorption rate (SAR) (Ibraheem, et al, 2014;Pyattaev, et al, 2018;Al Ja'afreh, et al, 2016;Xu, et al, 2016;Alshamaileh, et al, 2019). Other design techniques reported in (Nadeem, et al, 2018;Dzagbletey, et al, 2018;Sharawi, et al, 2017;Kowalewski, et al, 2020;Nadeem, et al, 2018;Yang, et al, 2020;Saxena, et al, 2020;Shen, et al, 2019) have complex structure.…”

Section: Mimo Antenna For Smartphonesmentioning

confidence: 99%

Advancements in MIMO Antennas for Enhanced Performance in 5G Smartphones Communication

Abbasi,

Aziz,

Akram

2024

ABBDM

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In this review paper provides a comprehensive overview of recent advancements in multiple input multiple output (MIMO) antenna designs for 5G smartphones. There are various antenna configurations that are discussed along with benefit and limitations. The paper also examines key challenges such as antenna mutual coupling, isolation and the size constraints inherent in smartphones. Furthermore, the impact of MIMO antenna design on 5G smartphone performance characteristics such as gain, radiation efficiency and spatial multiplexing capability is also analyzed. Finally, future research directions and potential innovations in MIMO antenna technology for 5G smartphones are identified to address emerging requirements and opportunities in next-generation wireless communication systems. The comprehensive comparison of different MIMO antenna performance is also given.

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“…The input impedance can be tuned by feed head dimensions (t p , w p , and L p ). The antenna can be miniaturised by adding a lumped capacitor between the loop and the ground plane or by filling the loop internal space by ferrite [15]. ii.…”

Section: Antenna Designmentioning

confidence: 99%

“…In addition to enhancing the radiation efficiency and power transmission of the implant antennas, the insulation layer prevents metallic oxidation and short circuit effect due to the high conductivity of human body tissues [16]. Effect of size and type of the insulation material on the ECLA antenna was investigated in [15]. In this paper, a Teflon insulation layer surrounds the antenna and a muscle layer with the dimensions of 100 × 100 × 100 mm 3 mimics the body tissue.…”

Section: Antenna Designmentioning

confidence: 99%

“…This contrasting behaviour of size and SAR produced by small antennas is an inherent characteristic of electric type antennas whereas small magnetic type antennas can provide a low electric field in near zone and consequently produce a low SAR [14]. In [15], a single band electrically coupled loop antenna (ECLA) which is dual of planar inverted antenna (PIFA) was proposed as a good candidate with small size and low produced SAR for the implant applications.…”

Section: Introductionmentioning

confidence: 99%

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Dual‐band electrically coupled loop antenna for implant applications

Akbarpour

Chamaani

2017

IET Microwaves, Antennas & Propagation

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Recent low power implant to off‐body communication systems uses both medical implant communication services (MICS) and industrial, scientific, and medical (ISM) frequency bands. In these systems, MICS band and ISM band (2.45 GHz) are dedicated for data transmission and wake‐up signal, respectively. This dual band operation which incredibly extends the life time of battery forces designers to use dual band antennas in both implant and off‐body sides. In this study, a dual band implant electrically coupled loop antenna is proposed. This antenna as dual of planar inverted‐F antenna is a magnetic antenna with inherently low near zone electric field and therefore produces low specific absorption rate (SAR) inside the body. The antenna is miniaturised using a lumped capacitor. In spite of small size of 5 × 5 × 3 mm3, the simulated 1 g average SAR is smaller than reported dual band implant antennas in both frequency bands and makes the proposed antenna a good candidate for implant applications.

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Performance of Electrically Coupled Loop Antenna inside human body at different frequency bands

Cited by 6 publications

References 4 publications

Combination Treatment with Liposomal Doxorubicin and Inductive Moderate Hyperthermia for Sarcoma Saos-2 Cells

Combination Treatment with Liposomal Doxorubicin and Inductive Moderate Hyperthermia for Sarcoma Saos-2 Cells

Advancements in MIMO Antennas for Enhanced Performance in 5G Smartphones Communication

Dual‐band electrically coupled loop antenna for implant applications

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