"How RF Anechoic Chambers Work"
This article describes the basic physics behind anechoic
chambers.
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(226 kB)
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(94 kB)
"Experiments in EMC: How Common Mode Currents Are Created"
Understanding how common mode currents are created is the
key to understanding why digital devices radiate and what to do about
it.
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"Computational Magic and the EMC Engineer"
Computational methods have the potential to revolutionize
EMC design and analysis.
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(861 kB)
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(432 kB)
"Know the Theory of Partial Inductance to Control Emissions"
Nothing is more central to the understanding why digital
devices radiate, and what to do about it, than understanding the theory
of partial inductance.
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(546 kB)
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(162 kB)
"Designing Enclosures for EMC Compliance"
While science has devised new computational methods for enclosure
design, the best tool for the job may still be your thumb.
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(426 kB)
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(152 kB)
"On-Chip Design for Better Noise Control"
ICs can be designed to minimize noise problems right at the
source.
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(306 kB)
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kB)
"Designing Log Periodic Antennas"
Lightweight and precise, log periodic antennas are a favorite
among EMC engineers.
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(1.2 MB)
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(547 kB)
"Applying Computational Methods to Test Site and Antenna Design"
Computational methods make understanding test site and antenna
design easy.
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(252 kB)
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(395 kB)
"Rethinking the Role of Power and Return Planes"
Power and return planes can be designed to do more than just
control supply impedances. They can be used for shielding as
well.
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format (819 kB)
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"Circuit Models Make Shield Design Simple"
Sure, shielding can cure coupling and crosstalk. But
shielding theory can be complex. Circuit models make things easy.
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kB)
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kB)
"Shiver Me Timers! Using Spread Spectrum Clock Generators"
Using Spread Spectrum Clock Generators (SSCG) is a creative
way to deal with EMI problems. But SSCGs must be used with care.
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format (948 kB)
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format (358 kB)
"Minimizing Ringing and Crosstalk"
Preserving signal integrity means controlling ringing and
crosstalk on PCBs. Here's a primer on the subject.
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format (296 kB)
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format (91 kB)
"A Simplified Algorithm for the Selection of Materials used to Construct
Open Area Test Sites"
One of the most critical tasks in building an Open Area Test
Site is deciding which materials to use. Fortunately, there's an easy
way to choose.
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kB)
"The Current Driven Model -- Experimental Verification and the Contribution
of Idd Delta to Digital Device Radiation"
The "Current Driven Model" helps explain why digital devices radiate,
and why radiation can be so difficult to root out.
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( 963 kB)
"Know When You Need to List Your Product -- And When You Don't"
A confusing patchwork of state, local and federal regulations
govern electrical equipment Here's a road map to help guide you through
the regulatory maze.
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"Lenny and Goliath"
How the US product safety system was finally opened to competition.
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(1139 KB)
"The EU in a Nutshell"
The European Union is a remarkable institution, a kind of "super
state." Here is a primer on how it operates, and how it regulates
products within its borders.
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"Inside the EU -- How it Really Works"
It's the European Union, not the individual member states, that
primarily regulate the sale of products within their borders. Here's
the inside story on how the EU really operates.
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"EU Regulation of Medical Devices -- Part 1"
One set of rules now governs the marketing of medical devices
in the entire European Union. Find here an in depth guide for complying.
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"EU Regulation of Medical Devices -- Part 2"
Part 2 of our in depth guide on complying with the EU's rules
governing medical devices.
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"A History of Medical Device Regulation in the United States"
To really understand the FDA's process of clearing medical devices
for market, you have to know how the rules evolved.
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(929 kB)
"Registration, Listing, and Investigation of Medical Devices"
The first step in getting your medical device to market is to follow
the FDA's rules for listing and registration.
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(1054 kB)
"Obtaining Clearance for Medical Devices"
Clearance under 501(k) as "substantially equivalent" is the key hurdle
most medical device manufacturers must overcome.
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(1036 kB)
"Current Good Manufacturing Procedures for Medical Device Manufacturers"
It's after the FDA's clearance of a device for marketing that the
challenge really begins. Know how to set up GMPs that will meet the
FDA's rules.
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(3078 kB)
"Current Good Manufacturing Practices for Medical Devices"
Part 2 of our series on setting up GMPs to meet the FDA's rules.
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(900 kB)
"A Dash of Maxwell's -- Chapter II -- Why Things Radiate." This
chapter explains Maxwell's Equations for the dynamic case and introduces
the "integral form" of the equations.
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(119 KB)
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(121 KB)
"A Dash of Maxwell's -- Chapter III -- The Difference a Del Makes."
This chapter explains the "differential form" of Maxwell's
Equations.
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(83 KB)
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(190 KB)
"A Dash of Maxwell's -- Chapter IV -- Equations Even a Computer Can
Love." This chapter introduces a "computational" form for Maxwell's
Equations which allows our computers to do most of the work.
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(190 KB)
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(64 KB)
"A Dash of Maxwell's -- Chapter V -- Radiation From a Small Wire Element."
This chapter computes the radiation from a small wire element, an
essential building block for the Method of Moments.
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(485 KB)
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(114 KB)
"A Dash of Maxwell's -- Chapter VI -- Method of Moments." This
chapter explains the Method of Moments and provides examples of its
use.
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(465 KB)
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(157 KB)
The RF Cafe Find here everything
needed for RF design except for the coffee.