Analysis of Propagation Characteristic of Human Body Using FDTD Method
- 주제(키워드) 인체통신 , FDTD
- 발행기관 고려대학교 대학원
- 지도교수 정지채
- 발행년도 2012
- 학위수여년월 2012. 2
- 학위구분 석사
- 학과 일반대학원 뇌공학과
- 원문페이지 58 p
- 실제URI http://www.dcollection.net/handler/korea/000000032966
- 본문언어 영어
- 제출원본 000045696582
초록/요약
In this thesis, we compute the electromagnetic field by simulator, when current source is excited to transmitting point in the 3-pose human body models (attention, watch, and grasp) that is based on Japanese average size. The simulator is based on the finite difference time domain (FDTD), frequency dependent dielectric properties of human muscle, and the 3-pose human body models. The propagated electric field from excited current source is detected to 4-receiving points in time domain, and propagation characteristic is analyzed in frequency range of 0 to 1 GHz by applying the fast Fourier transform (FFT). As propagated wave from transmitting point pass through human body and receiving point moves away from the ingested source, the received electric fields relatively lower attenuation. And transmitting efficiency has optimum value at around 300 MHz. It leads us to conclude that distance and relative location between transmitter and receiver on electromagnetic propagation is more important than the pose difference in the frequency range 0 to 1 GHz.
more목차
ABSTRACT i
CONTENTS ii
List of Figures iii
List of Tables vi
Chapter 1. Introduction 1
Chapter 2. Human Body Modeling 3
2.1 Type and size of human body model 3
2.2 Frequency dependent dielectric properties of the human body 5
Chapter 3. Numerical Simulation 10
3.1 FDTD method 10
3.2 Determining time step and cell size 14
3.3. Absorbing boundary conditions (ABCs) 16
3.4. PML boundary condition 18
3.5. Making simplified human body model in simulation 20
3.6. Composition of numerical simulation 23
3.7. Wave propagation shapes in free space and around the human model 27
Chapter 4. Simulation Results 30
4.1 Analysis of electromagnetic propagation from ingested source 30
4.2 Attention model 32
4.3 Watch model 36
4.4. Grasp model 40
Chapter 5. Conclusion 44
References 45
