Investigation of a Novel Compact Microstrip Antenna for Radiotelemetry Capsules Based on FDTD  

作　　者：黄标 颜国正 李倩如 

机构地区：[1]No.820 Lab .,Department of Instrument,Shanghai Jiaotong University

出　　处：《Journal of Donghua University(English Edition)》2007年第4期445-450,共6页东华大学学报（英文版）

基　　金：National 863 Plan (2004AA404013) .

摘　　要：The objective of this paper is to design a microstrip patch antenna for the miniature electro-capsule communicating with external recorder at 915MHz located in Industry, Science, and Medical (ISM) bands. Microstrip antenna design parameters, resonance characteristics and radiation patterns are evaluated using the finite-difference time-domain (FDTD) method. The effects of location of feed point and human body are analyzed, and the radiation performances of the proposed antenna are estimated in terms of radiation patterns. Finally, specific absorption rate (SAR) computations are also performed, and the peak 1-g and 10-g SAR values are calculated. According to peak SAR values, the maximum delivered power for the designed antenna was found so that the SAR values of the antennas satisfy ANSI limitations.The objective of this paper is to design a microstrip patch antenna for the miniature electro-capsule communicating with external recorder at 915 MHz located in Industry, Science, and Medical （ISM） bands. Microstrip antenna design parameters, resonance characteristics and radiation patterns are evaluated using the finite-difference time-domain （FDTD） method. The effects of location of feed point and human body are analyzed, and the radiation performances of the proposed antenna are estimated in terms of radiation patterns. Finally, specific absorption rate （SAR） computations are also performed, and the peak 1-g and 10-g SAR values are calculated. According to peak SAR values, the maximum delivered, power for the designed antenna was found so that the SAR values of the antennas satisfy ANSI limitations.

关 键 词：Finite-difference time-domain （ FDTD ）methods low-profile antenna specific absorption rate（ SAR） radiotelemetry capsules 

分 类 号：TN82[电子电信—信息与通信工程]