Please wait a minute...
ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2007, Vol. 8 Issue (10): 1560-1567    DOI: 10.1631/jzus.2007.A1560
Electrical & Electronic Engineering     
A four spiral slots microstrip patch antenna for radiotelemetry capsules based on FDTD
HUANG Biao, YAN Guo-zheng, LI Qian-ru
Department of Instrument, Shanghai Jiao Tong University, Shanghai 200240, China
Download:     PDF (0 KB)     
Export: BibTeX | EndNote (RIS)      

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.

Key words： Finite-difference time-domain (FDTD)      Microstrip patch antenna      Specific absorption rate (SAR)      Radiotelemetry capsule     
Received: 27 December 2006     
CLC:  TN82  
Service
E-mail this article
Add to my bookshelf
Add to citation manager
E-mail Alert
RSS
Articles by authors
HUANG Biao
YAN Guo-zheng
LI Qian-ru
Cite this article:

HUANG Biao, YAN Guo-zheng, LI Qian-ru. A four spiral slots microstrip patch antenna for radiotelemetry capsules based on FDTD. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2007, 8(10): 1560-1567.

URL:

http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.2007.A1560     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2007/V8/I10/1560

[1] Ling-fei MO, Hong-jian ZHANG, Hong-liang ZHOU. Analysis of dipole-like ultra high frequency RFID tags close to metallic surfaces[J]. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2009, 10(8): 1217-1222.
[2] Zhen-guo LIU, Zhi-chen GE, Xi-yuan CHEN. Research progress on Fabry-Perot resonator antenna[J]. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2009, 10(4): 583-588.
[3] MEHTA Amit. Practical realization of dual S arm antenna for beam steering applications[J]. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2007, 8(12): 1901-1904.
[4] ZHU Fang-ming, HU Jun. Improved patch antenna performance by using a metamaterial cover[J]. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2007, 8(2 ): 5-.
[5] MOHAMMAD Tariqul Islam, ZAINOL Abidin Abdul Rashid. MI-NLMS adaptive beamforming algorithm for smart antenna system applications[J]. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2006, 7(10): 13-.
[6] Hu Jun, Yan Chun-sheng, Lin Qing-chun. A new patch antenna with metamaterial cover[J]. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2006, 7(1): 89-94.
[7] LIN Qing-chun, ZHU Fang-ming, HE Sai-ling. A new photonic bandgap cover for a patch antenna with a photonic bandgap substrate[J]. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2004, 5(3): 269-273.