Munk_Metamaterial:critique and alternatives: Munk_Metamaterial_critique and alternatives.part1.rar

批判负折射的书

CONTENTS
Foreword xiii
Preface xv
1 Why Periodic Structures Cannot Synthesize Negative
Indices of Refraction 1
1.1 Introduction 1
1.1.1 Overview 1
1.1.2 Background 2
1.2 Current Assumptions Regarding Veselago’s Medium 2
1.2.1 Negative Index of Refraction 2
1.2.2 Phase Advance when n1 <0 3
1.2.3 Evanescent Waves Grow with Distance for
n1 <0 3
1.2.4 The Field and Phase Vectors Form a Left-Handed
Triplet for n1 <0 3
1.3 Fantastic Designs Could Be Realized if Veselago’s Material
Existed 5
1.4 How Veselago’s Medium Is Envisioned To Be Synthesized
Using Periodic Structures 6
1.5 How Does a Periodic Structure Refract? 9
1.5.1 Infinite Arrays 9
1.5.2 What About Finite Arrays? 15
1.6 On the Field Surrounding an Infinite Periodic Structure
of Arbitrary Wire Elements Located in One or More
Arrays 16
1.6.1 Single Array of Elements with One Segment 16
1.6.2 Single Array of Elements with Two Segments 18
1.6.3 Single Array of Elements with an Arbitrary Number
of Segments 19
1.6.4 On Grating Lobes and Backward-Traveling Waves
20
1.6.5 Two Arrays of Elements with an Arbitrary Number
of Segments 21
vii
viii CONTENTS
1.6.6 Can Arrays of Wires Ever Change the Direction
of the Incident Field? 23
1.7 On Increasing Evanescent Waves: A Fatal Misconception
23
1.8 Preliminary Conclusion: Synthesizing Veselago’s Medium
by a Periodic Structure Is Not Feasible 24
1.9 On Transmission-Line Dispersion: Backward-Traveling
Waves 26
1.9.1 Transmission Lines 26
1.9.2 Periodic Structures 30
1.10 Regarding Veselago’s Conclusion: Are There Deficiencies?
32
1.10.1 Background 32
1.10.2 Veselago’s Argument for a Negative Index
of Refraction 32
1.10.3 Veselago’s Flat Lens: Is It Really Realistic? 34
1.11 Conclusions 35
1.12 Common Misconceptions 38
1.12.1 Artificial Dielectrics: Do They Really Refract?
38
1.12.2 Real Dielectrics: How Do They Refract? 40
1.12.3 On the E- and H-Fields 41
1.12.4 On Concentric Split-Ring Resonators 42
1.12.5 What Would Veselago Have Asked if . . . 42
1.12.6 On “Magic” Structures 43
References 44
2 On Cloaks and Reactive Radomes 47
2.1 Cloaks 47
2.1.1 Concept 47
2.1.2 Prior Art 47
2.1.3 Alternative Explanation 48
2.1.4 Alternative Design 50
2.1.5 What Can You Really Expect from a Cloak? 50
2.2 Reactive Radomes 51
2.2.1 Infinite Planar Array with and Without Reactive
Radome 51
2.2.2 Line Arrays and Single Elements 54
2.3 Common Misconceptions 55
2.3.1 Misinterpretation of Calculated Results 55
CONTENTS ix
2.3.2 Ultimately: What Power Can You Expect from a
Short Dipole Encapsulated in a Small Spherical
Radome? 56
2.4 Concluding Remarks 57
References 58
3 Absorbers with Windows 61
3.1 Introduction 61
3.2 Statement of the Problem 61
3.3 Concept 62
3.4 Conceptual Designs 63
3.5 Extension to Arbitrary Polarization 66
3.6 The High-Frequency Band 66
3.7 Complete Conceptual Rasorber Design 67
3.8 Practical Designs 69
3.9 Other Applications of Traps: Multiband Arrays 69
Reference 70
4 On Designing Absorbers for an Oblique Angle
of Incidence 71
4.1 Lagarkov’s and Classical Designs 71
4.2 Salisbury Screen 74
4.3 Scan Compensation 76
4.4 Frequency Compensation 77
4.5 Circuit Analog Absorbers 80
4.6 Other Designs: Comparison and Discussion 85
4.7 Conclusions 89
References 91
5 The Titan Antenna: An Alternative to Magnetic Ground
Planes 93
5.1 Introduction 93
5.2 Layout of the Antenna 94
5.3 On Double-Band Matching in General 96
5.4 Matching the Sleeve Elements 97
5.5 Further Matching: The Main Distribution Network 101
5.6 The Balun 103
5.7 The Radiation Pattern 104
5.8 Something that Sounds Too Good To Be True Usually Is
106
x CONTENTS
5.9 Efficiency Measurements 108
5.10 A Common Misconception 108
5.11 We Put the Magnetic Ground Plane to Rest 109
5.12 Conclusions 112
References 113
6 Summary and Concluding Remarks 115
6.1 Background 115
6.2 The Features of Veselago’s Material 116
6.3 What Can a Periodic Structure Actually Simulate? 117
6.4 Did Veselago Choose the Wrong Branch Cut? 118
6.5 Could We Ever Have a Negative Index of Refraction?
118
6.6 Could Veselago Have Avoided the Wrong Solution? 120
6.7 So What Came Out of It? 121
6.8 Is Publishing the Ultimate Goal in Scientific Research?
122
6.9 What Excites a Scientist? 122
6.10 How Far Have We Gone in Our Self-Deception? 124
6.11 But Didn’t Anyone Suspect Anything? 124
6.12 How Realistic Are Small Arrays? 125
References 126
Appendix A The Paper Rejected in 2003 129
A.1 Comments Written in 2007 Concerning My Rejected
Paper Submitted in 2003 129
A.2 The Paper Rejected in 2003 131
Appendix B Cavity-Type Broadband Antenna with a
Steerable Cardioid Pattern 149
B.1 Introduction 149
B.2 Design 1 149
B.3 Design 2 151
B.4 Development of Design 2b 154
B.4.1 Push–Push Traps 157
B.4.2 Actual Layout 158
B.4.3 Phase Reversal in the Balun 160
B.4.4 Final Execution of Design 2b 162
B.4.5 Radiation Pattern 162
B.4.6 Impedance 165
CONTENTS xi
B.5 Conclusions 165
References 166
Appendix C How to Measure the Characteristic Impedance
and Attenuation of a Cable 167
C.1 Background 167
C.2 Input Connector Effect 170
C.3 Do the Formulas Hold in the Smith Charts? 171
C.4 How to Measure the Cable Loss 171
Reference 173
Appendix D Can Negative Refraction Be Observed Using
a Wedge of Lossy Material? 175
D.1 Introduction 175
D.2 Refraction for Planar Slabs 175
D.3 Wedge-Shaped Dielectric 179
D.4 Asymmetric Aperture Distributions in General 181
D.5 Conclusions 181
References 184
Index 185

楼主取消收费，可以给奖励。

这个作者可是大牛，不过去年去世了。他在世时，好多关于左手材料的项目申请就是被他毙掉的。

hehe，最近在研究左手材料，虽然我对其存在性不存在疑问，但感觉作者这样执著的反对它，也是件很有意思的事情——所谓理不辩不明嘛！下载啦，谢谢楼主！

thank you !!!!!!!!!!!!!!!!!!!!!!!!!!

回复 3# barbecue5


    牛人牛脾气

Ohio州立大学的这位大牛有意思~^_^

Thank you for your sharing

那可要好好看看啊

去世了，才知道。这是很厉害的一个人。
谢谢楼主的分享。

感谢楼主分享

现在很少有人批判超材料了。。。

谢谢楼主分享了

very interesting!

大家有完整的看过书中的内容吗？有没有一些针对其中观点的反对意见呢？

我最近刚刚看完，发现作者讲的都蛮有道理的，做了一年多的理论研究，现在对超材料也是越来越没有信心了

从事这方面的研究，更应该看一下。

谢谢楼主，正从事特异材料的研究

谢谢楼主，正从事特异材料的研究

我觉得这才是真正务实的牛人

有意思，可以下来看看 呵呵

谢谢楼主的分享:46bb

好牛的人

本帖最后由 cnm 于 2011-4-20 14:06 编辑

发表于 2011-1-25 14:16 cnm 于 2011-1-25 14:27  


Metamaterial 何止就业堪忧, 它是一场大骗局, 正如同安徒生笔下的"皇帝的新衣". 不少人大肆灌水发无用的论文, 捞私利, 浪费宝贵的社会资源.

虽然很多年前就有人提出它, 但由于众所周知的原因, 无法兴风起浪. 近些年, 以加大T. Itoh为首的一些教授, 重新炒作起了METAMATERIAL, 让"皇帝的新衣"这场闹剧弄到了无以复加的地步. 大大败坏了求是求真的学术风气. 实是社会罪人, 若干年后, 历史对此当有公论.  

材料方面的Metamaterial 也有人研究, 但基本没什么进展. 基于电路的Metamaterial 那点破东西根本就可以用传统的滤波器理论解决的清清楚楚. 以Ralph Levy为代表的一批严谨的老学者, 正如同敢讲真话的儿童, 严厉地迎头痛批了这股歪风. 可是要马上刹住这股歪气, 并非易事. . 学术界听似高尚, 其实有时同样丑陋肮脏.

别趟着个, 免得遗臭万年.

同意此观点，确实是过于兴风作浪了，许多论文都是灌水，Munk书中自有犀利的批判

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