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ÊéÃûAdvanced Materials
and Design for
Electromagnetic
Interference Shielding
×÷ÕßXingcun Colin Tong
Ò³Êý342
³ö°æÉçCRC
³ö°æÊ±¼ä2009
ÕªÒªThis book contains information obtained from authentic and highly regarded sources. Reasonable
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ISBN 978‑1‑4200‑7358‑4 (alk. paper)
Ŀ¼Preface.................................................................................................................... xiii
Author......................................................................................................................xv
Chapter 1 Electromagnetic Interference Shielding Fundamentals.
and Design Guide................................................................................1
1.1 Concepts of Electromagnetic Interference and Electromagnetic
Compatibility...................................................................................................1
1.1.1 EMI Problems and Common Concerns............................................2
1.1.2 EMI Emissions and Controlling Methods........................................3
1.1.2.1 Conducted EMI Emission.................................................4
1.1.2.2 Radiated EMI Emission....................................................5
1.1.3 EMC Regulations and Testing Standards.........................................8
1.1.3.1 The International Standard...............................................9
1.1.3.2 FCC Standard...................................................................9
1.1.3.3 European Standard......................................................... 10
1.1.3.4 Military Standard........................................................... 10
1.2 EMI Shielding Principles............................................................................... 11
1.2.1 Shielding Effects in the E-Field and H-Field.................................. 11
1.2.2 Shielding Effectiveness................................................................... 13
1.2.2.1 Absorption Loss.............................................................. 14
1.2.2.2 Reflection Loss............................................................... 15
1.2.2.3 Multiple Reflection Correction Factor............................ 16
1.2.3 Shielding Modeling in Practice....................................................... 18
1.2.3.1 Metallic Enclosure.......................................................... 18
1.2.3.2 EMI Gasket..................................................................... 19
1.2.3.3 Shield with Apertures.....................................................20
1.2.3.4 Cavity Resonance............................................................23
1.3 EMC Design Guidelines and EMI Shielding Methodology..........................24
1.3.1 Design for EMC..............................................................................24
1.3.2 Shielding Methods and Materials Selection...................................27
1.3.2.1 Shielding Housing and Enclosures.................................27
1.3.2.2 Gasketing........................................................................29
1.3.2.3 Integral Assembly...........................................................30
1.3.2.4 Corrosion and Material Galvanic Compatibility............ 31
1.3.3 Environmental Compliance............................................................ 32
1.3.3.1 RoHS Directive............................................................... 33
1.3.3.2 WEEE Directive.............................................................34
References................................................................................................................. 35¡ï¡ï¡ï¡ï¡ï¡ï2014Êé¼®³¬¼¶Ìû°ËÎåÈý¡¶µç´Å¸ÉÈÅÆÁ±Î²ÉÓõÄÏȽø²ÄÁϼ°Éè¼Æ¡·2014×îÐÂÊé¼®
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