Magnetic loop antenna for wireless capsule endoscopy inside the human body operating at 315 MHz: Near field behavior

Fatiha El hatmi, M. Grzeskowiak, T. Alvès, S. Protat, O. Picon
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引用次数: 9

Abstract

In ingestible systems, the antenna suffers from deterioration of performances due to surrounding dissipative tissues. A small circular magnetic loop antenna, whose diameter is equal to 1 cm and thickness is equal to 0.5 mm operating at the frequency of 315 MHz in the ISM band, is proposed to limit this degradation. The electric properties of the human body, having a high dielectric constant and low impedance, are considered to design and simulate the loop antenna. We found that the magnetic field is less attenuated than the electric field in the human body that improves the signal level received by near field magnetic coupling.
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315mhz工作频率的人体内无线胶囊内窥镜磁环天线:近场行为
在可吸收系统中,由于周围的耗散组织,天线的性能会下降。提出了一种直径为1cm,厚度为0.5 mm的小型圆形磁环天线,工作在ISM频段315mhz的频率上,以限制这种退化。环形天线的设计和仿真考虑了人体高介电常数和低阻抗的电学特性。我们发现,磁场比人体电场衰减更小,提高了近场磁耦合接收的信号水平。
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Early demonstration of a passive millimeter-wave imaging system using substrate integrated waveguide technology Magnetic loop antenna for wireless capsule endoscopy inside the human body operating at 315 MHz: Near field behavior Proximity coupled microstrip patch antenna design with reduced out of band harmonics device at 2.45 GHz Analysis and design of dual band-notched interdigital hairpin UWB bandpass filter Novel technique for improvement of transmission line matrix method algorithm frequency response
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