Wyniki wyszukiwania - BazTech

1

Miniaturized Wearable Fractal Patch Antenna for Body Area Network Applications

Jain Vikas, Dhaliwal Balwinder Singh

International Journal of Electronics and Telecommunications

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2021

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Vol. 67, No. 2

149--154

EN

This article presents the design of a miniaturized wearable patch antenna to be utilized for the body area network (BAN) applications. To reduce the size of the antenna a crown fractal geometry antenna design technique has been adopted, and which resulted in a size reduction of 26.85%. Further, the polyester cloth has been used as the substrate of the antenna to make the proposed antenna a flexible one, and suitable for wearable biomedical devices. The designed antenna functions for the 2.45 GHz ISM band and has the gain and bandwidth of 4.54 dB and 131 MHz respectively, covering the entire ISM band. The antenna characteristics like return loss (S11), directivity and radiation pattern have been simulated and analyzed. Specific absorption rate (SAR) and front to back ratio (FBR) of the proposed antenna at the human body tissue model (HBTM) in the planer and different bending conditions of the antenna have also simulated and analyzed, and the proposed antenna fulfils the desired design standards.

2

Determination of diffusion coefficient and permeability through the barrier of substance in simulated biomedical systems

Adach A., Skassa A., Bugalska A., Kister N.

Chemical and Process Engineering

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2017

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Vol. 38, nr 4

543--554

EN

The investigations deal with mass transfer in simulated biomedical systems. The modification of classical diffusion chamber, sequential unit (SU) system, imitated different biomedical setups, boundary conditions. The experiments simulated: diffusion chamber (also with two barriers), transport through the membrane to the blood stream, transport from the stent eluting drug simultaneously to the vessel cells and to the blood stream. The concentrations of substances and the relative mass increases/decreases for SU systems indicate that the order of the curves follows the order of mass transfer resistances. The strong dependence of mass transfer rates versus type of diffusing substance was confirmed. The calculated drug fluxes, diffusion coefficients, permeation coefficients are convergent with literature. Permeation coefficients for complex sequential systems can be estimated as parallel connexion of constituent coefficients. Experiments approved functionality of the SU for investigations in a simulated biomedical system. Obtained data were used for numerical verification.

3

Bluetooth versus other short-range wireless systems for transmission of information in biomedical devices

Dąbrowski A., Kardyś P., Marciniak T.

Zeszyty Naukowe. Telekomunikacja i Elektronika / Uniwersytet Technologiczno-Przyrodniczy w Bydgoszczy

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2007

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z. 10

41-53

EN

In this article the Bluetooth digital wireless connectivity system is compared with other contemporary techniques of short-range communications as regards their application in biomedical devices. Furthermore some interesting proposals are presented for Bluetooth implementation in supporting systems for handicapped people. One of such systems supporting speech has been drawn up by the authors.

PL

W artykule dokonano porównania cyfrowego systemu łączności bezprzewodowej Bluetooth z innymi współczesnymi technikami komunikacyjnymi krótkiego zasięgu pod \\zgledem możliwości ich zastosowania \v urządzeniach biomedycznych, wykazując przewagę technologii Bluetooth do tych zastosowań. Ponadto przedstawiono kilka ciekawych propozycji implementacji technologii Bluetooth w systemach wspomagających osoby niepełnosprawne. Jeden z takich systemów -wspomagający mowę - został opracowany przez autorów.