How EMI Filters Are Specified For RF Performance

Don’t overlook the fact that EMI filters can be used to prevent unwanted RF noise (such as electrical fast transient burst, conducted RF, and some surges) from entering susceptible devices.

Fast Evaluation of a Filter or Shield Against an Electromagnetic Pulse

Single electromagnetic pulses like lightning, ESD, powerline transients, NEMP, etc., are generally described in time domain, while filters and shields are practically always characterized in frequency domain. This article describes a quick and handy formula and nomogram providing a fair estimate of the filter or shield response to a conducted or radiated threat.

Let’s Talk About Why Filters Fail

This article looks at some of the reasons why the filters you may think will work often do not when they’re put into real circuits. So… let’s talk about why filters fail.
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S-parameters and EMI Filter Response

S-parameters are very useful to evaluate, understand, and optimize the response of your filters. If you are unfamiliar with this typical tool for RF engineers, this column is for you.