诺基亚芬兰无线实验室手机天线技术文档69页（独家资料）

laihager

芬兰无线实验室，赫尔辛基大学博士出版的技术报告，里面集合了他们多年来的研究心得和成果.
内容绝对精彩超值，而且我论文答辩的时候，这位博士也在场，这份资料是他本人发给我的学习资料.

“MINIATURIZATION AND EVALUATION METHODS OF MOBILE TERMINAL ANTENNA STRUCTURES”

Table of contents
PREFACE..............................................................................................................................................1
ABSTRACT...........................................................................................................................................2
TIIVISTELM?.....................................................................................................................................3
TABLE OF CONTENTS.......................................................................................................................4
LIST OF PUBLICATIONS...................................................................................................................6
AUTHOR扴 CONTRIBUTION............................................................................................................7
1 INTRODUCTION........................................................................................................................8
1.1 BACKGROUND........................................................................................................................8
1.2 OBJECTIVES OF THE THESIS.....................................................................................................9
1.3 ORGANIZATION OF THE THESIS...............................................................................................9
2 MOBILE TERMINAL ANTENNAS.........................................................................................10
2.1 INTRODUCTION.....................................................................................................................10
2.2 FUNDAMENTAL TERMS..........................................................................................................10
2.2.1 Quality factor................................................................................................................10
2.2.2 Impedance bandwidth...................................................................................................11
2.2.3 Efficiency.....................................................................................................................11
2.2.4 Specific Absorption Rate (SAR)....................................................................................12
2.3 FUNDAMENTAL LIMITATIONS ON ANTENNA SIZE REDUCTION..............................................13
2.4 THE COMBINATION OF MOBILE TERMINAL ANTENNA AND CHASSIS.....................................13
2.4.1 General........................................................................................................................13
2.4.2 Resonator based analysis.............................................................................................14
2.4.3 Characteristic mode theory..........................................................................................15
3 COUPLING ELEMENT BASED MOBILE TERMINAL ANTENNAS...............................16
3.1 INTRODUCTION.....................................................................................................................16
3.2 OPTIMUM SHAPE AND LOCATION OF A COUPLING ELEMENT.................................................16
3.3 IMPEDANCE MATCHING NETWORKS......................................................................................18
3.3.1 General........................................................................................................................18
3.3.2 Theoretical limitations on broadband impedance matching........................................19
3.3.3 Single-resonant impedance matching...........................................................................19
3.3.4 Dual-resonant impedance matching.............................................................................20
3.4 PERFORMANCE COMPARISON WITH PIFAS...........................................................................23
3.4.1 Bandwidth and bandwidth-to-volume ratio..................................................................24
3.4.2 Specific Absorption Rate (SAR)....................................................................................25
3.4.3 Radiation efficiency......................................................................................................25
4 MULTI-BAND AND MULTI-RESONANT ANTENNA STRUCTURES.............................27
4.1 INTRODUCTION.....................................................................................................................27
4.2 TRADITIONAL INTERNAL ANTENNA SOLUTIONS...................................................................27
4.2.1 General........................................................................................................................27
4.2.2 The general principle of multi-band antennas..............................................................28
4.2.3 Multi-band antennas with multiple resonances per band.............................................28
4.3 COUPLING ELEMENT BASED ANTENNA SOLUTIONS...............................................................28
4.3.1 General........................................................................................................................28
4.3.2 Patch-type coupling elements.......................................................................................29
4.3.3 Loop-type coupling elements........................................................................................32 4
4.3.4 Coupling via a slot on a chassis...................................................................................32
5 RADIATION CHARACTERISTICS OF MOBILE TERMINAL ANTENNAS IN WIDE FREQUENCY RANGE..............................................................................................................33
5.1 INTRODUCTION.....................................................................................................................33
5.2 BANDWIDTH, SAR AND EFFICIENCY OVER WIDE FREQUENCY BAND...................................33
5.2.1 Bandwidth.....................................................................................................................33
5.2.2 SAR and radiation efficiency in talk position...............................................................36
5.3 ANTENNA PERFORMANCE IN CLAMSHELL-TYPE PHONES......................................................37
6 PERFORMANCE EVALUATION OF MULTI-ANTENNA CONFIGURATIONS............40
6.1 INTRODUCTION.....................................................................................................................40
6.2 PERFORMANCE METRICS FOR MULTI-ANTENNA TERMINALS AND SYSTEMS.........................41
6.2.1 Diversity gain and envelope correlation......................................................................41
6.2.2 Effective Array Gain.....................................................................................................41
6.2.3 Capacity and eigenvalue dispersion.............................................................................41
6.3 MEASUREMENT BASED ANTENNA TEST BED (MEBAT)........................................................42
6.3.1 General operating principle.........................................................................................42
6.3.2 Accuracy evaluation.....................................................................................................43
6.4 EMPIRICAL COMPARISON OF MULTI-ANTENNA CONFIGURATIONS........................................45
6.4.1 General........................................................................................................................45
6.4.2 Diversity gain and envelope correlation......................................................................45
6.4.3 Effective Array Gain.....................................................................................................46
6.4.4 Capacity and eigenvalue dispersion.............................................................................50
7 SUMMARY OF PUBLICATIONS............................................................................................51
8 CONCLUSIONS.........................................................................................................................53
REFERENCES....................................................................................................................................56
PUBLICATIONS..........................................................................................................................68

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<p align=right><font color=red>+9 RD币</font></p>

laihager

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laihager

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irise

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laihager

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hjatr

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hjatr

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hjatr

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hjatr

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hjatr

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laihager

是3RD，你已经购买了

xuanjiwei

买了，学习一下。

lafusiji

[em42]赚分走人~

2007_12_9

先下了再说[em03]

chasesun

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yes

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san_water

[em01]

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