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Journal of Zhejiang University SCIENCE A 2007 Vol.8 No.10 P.1560~1567

http://doi.org/10.1631/jzus.2007.A1560


A four spiral slots microstrip patch antenna for radiotelemetry capsules based on FDTD


Author(s):  HUANG Biao, YAN Guo-zheng, LI Qian-ru

Affiliation(s):  Department of Instrument, Shanghai Jiao Tong University, Shanghai 200240, China

Corresponding email(s):   huangb@sjtu.edu.cn

Key Words:  Finite-difference time-domain (FDTD), Microstrip patch antenna, Specific absorption rate (SAR), Radiotelemetry capsule


HUANG Biao, YAN Guo-zheng, LI Qian-ru. A four spiral slots microstrip patch antenna for radiotelemetry capsules based on FDTD[J]. Journal of Zhejiang University Science A, 2007, 8(10): 1560~1567.

@article{title="A four spiral slots microstrip patch antenna for radiotelemetry capsules based on FDTD",
author="HUANG Biao, YAN Guo-zheng, LI Qian-ru",
journal="Journal of Zhejiang University Science A",
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number="10",
pages="1560~1567",
year="2007",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.2007.A1560"
}

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%T A four spiral slots microstrip patch antenna for radiotelemetry capsules based on FDTD
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%A YAN Guo-zheng
%A LI Qian-ru
%J Journal of Zhejiang University SCIENCE A
%V 8
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%@ 1673-565X
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%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.2007.A1560

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T1 - A four spiral slots microstrip patch antenna for radiotelemetry capsules based on FDTD
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A1 - YAN Guo-zheng
A1 - LI Qian-ru
J0 - Journal of Zhejiang University Science A
VL - 8
IS - 10
SP - 1560
EP - 1567
%@ 1673-565X
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PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.2007.A1560


Abstract: 
Antenna is very crucial to radiotelemetry capsules which can measure the physiological parameters of the gastrointestinal (GI) tract. The objective of this paper is to design a novel spiral slots microstrip patch antenna for the radiotelemetry capsules communicating with external recorder at 915 MHz located in ISM (Industry, Science, and Medical) bands. The microstrip patch antenna is designed and evaluated using the finite-difference time-domain (FDTD) method. Return loss characteristics and the effect of the human body on resonant frequency are analyzed, and the performances of radiation patterns at different positions of the human alimentary tract are also estimated. Finally, specific absorption rate (SAR) computations are performed, and the peak 1-g and 10-g SAR values are calculated. According to the peak SAR values, the maximum delivered power for the designed antenna was found so that the SAR values of the antenna satisfy the ANSI (American National Standards Institute) limitations.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

Reference

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