杭电电磁场与微波实验__AWR实验报告__低通滤波器

微芯科技(Microchip )公司提供一种工作于PWM模式的风扇制冷速度控制器系列产品，用于无刷直流风扇 ，本文主要介绍抗电磁干扰的PWM风扇控制器原理及应用。

Editorial Reviews Review "...well written and flows smoothly...provides electrical engineering students with a new perspective in applied electromagnetics and circuit design...highly recommended." (CHOICE, September 2006) "...well written and flows smoothly...provides electrical engineering students with a new perspective in applied electromagnetics and circuit design...highly recommended." (CHOICE, September 2006) Product Description A Landmark text thoroughly updated, including a new CD As digital devices continue to be produced at increasingly lower costs and with higher speeds, the need for effective electromagnetic compatibility (EMC) design practices has become more critical than ever to avoid unnecessary costs in bringing products into compliance with governmental regulations. The Second Edition of this landmark text has been thoroughly updated and revised to reflect these major developments that affect both academia and the electronics industry. Readers familiar with the First Edition will find much new material, including: * Latest U.S. and international regulatory requirements * PSpice used throughout the textbook to simulate EMC analysis solutions * Methods of designing for Signal Integrity * Fortran programs for the simulation of Crosstalk supplied on a CD * OrCAD(r) PSpice(r) Release 10.0 and Version 8 Demo Edition software supplied on a CD * The final chapter on System Design for EMC completely rewritten * The chapter on Crosstalk rewritten to simplify the mathematics Detailed, worked-out examples are now included throughout the text. In addition, review exercises are now included following the discussion of each important topic to help readers assess their grasp of the material. Several appendices are new to this edition including Phasor Analysis of Electric Circuits, The Electromagnetic Field Equations and Waves, Computer Codes for Calculating the Per-Unit-Length Parameters and Crosstalk of Multiconductor Transmission Lines, and a SPICE (PSPICE) tutorial. Now thoroughly updated, the Second Edition of Introduction to Electromagnetic Compatibility remains the textbook of choice for university/college EMC courses as well as a reference for EMC design engineers. An Instructor's Manual presenting detailed solutions to all the problems in the book is available from the Wiley editorial department. From the Publisher Deals with the topic of interference (electromagnetic compatibility) in electronic systems. It builds on basic undergraduate electrical engineering concepts and principles and applies them to the design of electronic systems that operate compatibly with other electronic systems and do not create interference phenomena. To facilitate classroom teaching it is divided in two parts. The first provides the basic principles and skills for review, while the second refers to applications and aspects of EMC design. --This text refers to an out of print or unavailable edition of this title. From the Back Cover A Landmark text thoroughly updated, including a new CD As digital devices continue to be produced at increasingly lower costs and with higher speeds, the need for effective electromagnetic compatibility (EMC) design practices has become more critical than ever to avoid unnecessary costs in bringing products into compliance with governmental regulations. The Second Edition of this landmark text has been thoroughly updated and revised to reflect these major developments that affect both academia and the electronics industry. Readers familiar with the First Edition will find much new material, including: Latest U.S. and international regulatory requirements PSpice used throughout the textbook to simulate EMC analysis solutions Methods of designing for Signal Integrity Fortran programs for the simulation of Crosstalk supplied on a CD OrCAD® PSpice® Release 10.0 and Version 8 Demo Edition software supplied on a CD The final chapter on System Design for EMC completely rewritten The chapter on Crosstalk rewritten to simplify the mathematics Detailed, worked-out examples are now included throughout the text. In addition, review exercises are now included following the discussion of each important topic to help readers assess their grasp of the material. Several appendices are new to this edition including Phasor Analysis of Electric Circuits, The Electromagnetic Field Equations and Waves, Computer Codes for Calculating the Per-Unit-Length Parameters and Crosstalk of Multiconductor Transmission Lines, and a SPICE (PSPICE) tutorial. Now thoroughly updated, the Second Edition of Introduction to Electromagnetic Compatibility remains the textbook of choice for university/college EMC courses as well as a reference for EMC design engineers. About the Author CLAYTON R. PAUL, PHD, is Professor and Sam Nunn Chair of Aerospace Systems Engineering, Department of Electrical and Computer Engineering, Mercer University. He is also Emeritus Professor of Electrical Engineering at the University of Kentucky, where he served on the faculty for twenty-seven years. Dr. Paul is the author of twelve textbooks in electrical engineering, has contributed numerous chapters to engineering handbooks and reference texts, and has published numerous technical papers in scientific journals and symposia. He is a Fellow of the IEEE and a Honorary Life Member of the IEEE EMC Society.

微波至太赫兹波段，石墨烯的电导率由带内贡献决定。利用带内电导率模型，研究了该频段石墨烯的表面电导率、等效表面阻抗和等效介电常数随化学势和温度的变化关系。石墨烯的表面电导率和等效表面阻抗受化学势的影响比较大，具有可调谐性，而受温度的影响比较小。根据带内电导率模型和石墨烯表面等离激元的色散方程研究了无限大平面石墨烯表面等离激元横磁模的有效模式指数。结果表明，石墨烯应用于等离子天线时，与传统材料的天线相比高度小型化。所以，石墨烯应用于天线具有可调谐、性能可靠和小型化等优点。根据电磁波的传输特性，研究了石墨烯的透射系数随化学势的变化关系，透射系数受化学势影响比较大，这为设计可调式太赫兹滤波器提供了可能。设计了可弯曲石墨烯天线，获得了较好的增益方向图。

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这是一篇关于电磁场与电磁波中的课程综述。有关于天线的，希望对大家有用