EMC Design: Circuits
Douglas Brooks
Conformity

This article touches on the basic principles of what designers should keep in mind while designing PCB in order to address EMI and SI related issues. The article provides a simple understanding of what is the cause of noise from an electromagnetic point of view in a way that every designer can understand.
http://www.conformity.com/0601/0601fundamentals.html

Electromagnetic Emissions of Integrated Circuits and PCBs
Jerzy F. Kolodziejski, Juliusz Szczesny
Institute of Electron Technology
 
There are at least a few reasons for the growing interest of electronic components manufacturers and users in the electromagnetic compatibility (EMC) of these components. Among them of great importance are: increase of packaging density of electronic circuits, lowering the levels of useful signals in respect to the background fluctuations (noise) level, and the rise of speed and functional complexity – above all in integrated circuits (ICs) and particularly digital ICs.
Talking about the EMC properties, one should take into account the two sides of the problem – electromagnetic emission (EME) and electromagnetic immunity (or susceptibility) of the considered objects. The first question will be discussed shortly in this paper. Illustrative examples will relate to digital integrated circuits and to the printed circuit boards (PCBs) with ICs. Both conducted and radiated emissions will be considered.
http://www.ieee.org/organizations/pubs/newsletters/emcs/spring04/practical.html

Reducing Emissions in the Buck Converter SMPS
Scott W. Mee, James E. Teune
Electronics Engineering, Johnson Controls, Inc. ASG.
  
Switched Mode Power Supply demands are increasing, as the electronics industry requires more DC-DC conversion. In the past, linear regulators have been used to regulate power, but as the difference between supply voltages and desired output voltage increases, they become very inefficient. The BUCK power supply is efficient in converting higher voltages to lower voltages, but unfortunately in the process, both change in current (dI/dt) and change in voltage (dV/dt) are experienced. These changing parameters can cause excessive emissions in the RF spectrum, in conducted and radiated forms. We will examine the modes under which these emissions are allowed to propagate, and investigate techniques used to reduce them.
http://www.ieee.org/organizations/pubs/newsletters/emcs/fall03/practical.html

Power-Bus Decoupling with Embedded Capacitance in Printed Circuit Board Design
M. Xu, T. H. Hubing, J. Chen, T. P. Van Doren, J. L. Drewniak and R. E. DuBroff
IEEE Transactions on Electromagnetic Compatibility
vol. 45, no. 1, Feb. 2003, pp. 22-30.

Printed Circuit Board EMI Source Mechanisms
T. Hubing
Proc. of the 2003 IEEE International Symposium on Electromagnetic Compatibility
Boston, MA, August 2003, pp. 1-3.

PCB EMC Design Guidelines: A Brief Annotated List
T. Hubing
Proc. of the 2003 IEEE International Symposium on Electromagnetic Compatibility
Boston, MA, August 2003, pp. 34-37

Why is MIL-STD 461 an Important Cots Feature for Our Military

Commercial Off-The-Shelf (COTS) has been the driving force for government portable, desktop, and rack mount computer procurement for over a decade. However, when these portables are purchased for the Department of Defense (DoD), COTS sometimes is not enough. In the military world, these computers must coexist with all other equipment, including powerful radio, radar, and microwave transmitters as well as highly sensitive receivers. Depending on their use, many of these COTS computers must be upgraded to meet more rigorous military needs.
For the DoD, specifying a computer's electromagnetic interference (EMI) and its electromagnetic compatibility (EMC) is an important judge on how well the computer will operate within many “noisy” environments. MIL-STD 461 documents the EMI requirements for a wide range of applications, from trucks to ships to aircraft to fixed installations, not to mention the different requirements within an application (e.g., above deck and below deck on a Navy ship). There is also a trend to tailor the requirements to particular applications. Although the most modest EMC requirements are not much different from COTS commercial requirements, most applications are decidedly harsh.
http://www.amrel.com/ASL_whitepaper.html