Why Study Electromagnetics?

One answer is electromagnetic theory is the basis of all we do and work with as electrical engineers. It is the explanation for why electrons and protons behave as they do, and thus why resistors, capacitors, inductors, transistors and ultimately all electrical gadgets work. But there are more practical answers:

(from Todd Hubing, "Chapter chatter," IEEE Electromagnetic Compatibility Society Newsletter, Summer 1994, p.3)

I tell students in my undergraduate electromagnetics classes that the material covered in these classes is crucial for any electrical engineer who plans to design or work with high-speed electronic systems. I stress that the concepts of parasitic capacitance, inductance, transmission line theory and radiation play an important role in the design of successful state-of-the-art electronics. "Unless you plan to use your degree to design toasters," I tell them, "you must be capable of working with circuits that operate at radio frequencies."

Well...when I look at what has transpired in the past five years and examine the current trends in electronics technology, it is clear to me that I need to reconsider my current advice to students. For example, if current trends continue the basic ACME toaster (model year 1999) will have the following features:

2 Intel Sextium (TM) processors clocked at 250 MHz
Personal communication network interface
automatic voice recognition
automatic bread recognition
maximum bread-to-toast time: 30 seconds
independent controls for toast color, temperature, and crispness
list price: $49.95 (about the same as a tank of gas or a sheet of postage stamps)

A high-end model marketed by AT&T will communicate with other kitchen appliances to coordinate meals. The leading manufacturer of household appliances, General Dynamics, will offer several models including one that meets all commercial and military EMI, ESD, and EMP requirements.

Of course...engineers who never quite master the concepts taught in their undergraduate EM classes will escape the confines of the academic environment and enter the work force. My guess is that these engineers will still be able to lead useful, productive lives in marketing or management. For those students interested in electronic circuit or system design, however, my recommendation is to pay close attention to the material presented in the electromagnetic fields and waves courses.