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TABLE OF CONTENTS

Acronyms ...a

Abstract ...i

1 ANALYSIS OF THE ELECTROMAGNETIC FIELD WITHIN BIOLOGICAL CELLS ...1

1.1 Introduction ...2

1.2 Biological cell model...4

1.3 Evaluation of the electric field intensity ...6

1.4 Mutual interaction ...11

1.5 Transmembrane potential...13

1.6 Conclusions...15

2 DESIGN OF A KU-BAND DIELECTRIC RESONATOR ANTENNA ...17

2.1 Introduction ...18

2.2 Active integrated antenna...24

2.3 Dielectric resonator antenna...25

2.3.1 Rectangular dielectric resonator antenna...26

2.4 Harmonic tuning techniques ...28

2.5 Antenna design and simulation results ...29

2.5.1 First harmonic tuning technique ...34

2.5.2 Second harmonic tuning technique...40

2.6 Conclusions...45

3 DIVERSITY FOR ON-BODY COMMUNICATION ...47

3.1 Introduction ...48

3.2 Body centric communication systems...49

3.3 Diversity scheme ...51

3.4 Diversity combining techniques ...53

3.4.1 Selection Combining...53

3.4.2 Equal Gain Combining...54

3.4.3 Maximum Ratio Combining...55

3.5 Data processing ...56

3.5.1 Power imbalance ...56

3.5.2 Correlation coefficient ...56

3.5.3 Diversity gain ...57

3.6 On-body space diversity measurements...59

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3.6.2 Data analysis ...61

3.6.3 Measurement results ...63

3.7 Conclusions...80

4 ANNULAR RING SLOT ANTENNA FOR ON-BODY COMMUNICATION ...83

4.1 Introduction ...84

4.2 Annular ring slot antennas ...85

4.3 Antenna design and construction ...86

4.4 Antenna measurements ...87

4.5 Conclusions...97

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