What do we study
• E.M. studies stationary charges, moving charges, the fields produced by them, and the interaction with matter.
• The field is a special substance, we must study its energy, mass, momentum, and motion behaviors.
Mathematics
Industry
Quantum theory Energy carrier
Chemistry General relativity
Optics
Special relativity
Field theory
Matter’s structure
Gravitational law High energy
APPLICATIONS, cont.d
Wireless applications • radar systems • microwave relay links • satellite systems (TV, telephony, data, military) • radio astronomy • biomedical engineering, etc.
• E.M. course should be the education of science diathesis(素质).
• E.M. is closely related to our daily life.
Family Tree
(Blood: Theory)
Unification theory
上海磁悬浮 列车
三峡水电站
新安江水电站
超导核聚变装置
Lightning/Flash
(thunder/thunderbolt) 落地雷---咔啦啦 高空雷---轰隆隆
APPLICATIONS
Personal wireless services • cordless telephony • cellular telephony → PCS • mobile data transfer • personal satellite communications • global navigation systems
• Electromagnetism is a fundamental branch of physics dealing with all aspects of the generation, propagation and transformation of electromagnetic energy as well as its interaction with matter.
RCS Analysis, Design, ATR & Stealth Technology
Antenna Analysis & Design
EMC/EMI Analysis
Remote Sensing & Subsurface Sensing
Why is Electromagnetics Important?
• It spans numerous areas from electrostatics and magnetostatics, through classical electrodynamics, to relativistic and quantum electrodynamics.
Cable communications (TV, data transport, telephony) Digital and Analog Microelectronics Power generation, power grids, power supply, power electronics Electro-mechanical devices and machinery
Personal satellite communications
Why is Electromagnetics Important? Global navigation satellite systems
Why is Electromagnetics Important? – high speed/high density integrated circuits
Electromagnetism Optical communication
Radio Electrics
physics Electronics
Telecommunication
Semi-conductor
IMPACT OF ELECTROMAGNETICS
Biomedical Engineering & BioTech
Knowledge of electromagnetics is required to explain certain technologies: – antennas
• transmitter and receiver are connected by a “fignetics Important?
Physics Based Signal Processing & Imaging
Computer Chip Design & Circuits
Lasers & Optoelectronics
Wireless Comm. & Propagation
ELECTROMAGNETICS
MEMS & Microwave Engineering
ELECTROMAGNETISM
(ELECTROMAGNETICS)
电磁学
浙江师范大学数理信息学院
主讲人: 童国平 教授
2007 Fall
Why must we study E.M.
• E.M. is foundation to all natural sciences, technologies and engineerings.