jim teune

We investigate two four-layer PCBs with power and ground plane pairs spaced 3 mils and 30 mils apart.

We investigate two four-layer PCBs with power and ground plane pairs spaced 3 mils and 30 mils apart.

This article reviews the decibel units used in EMC laboratory measurements and testing. We begin by defining a decibel (dB) unit and proceed to the EMC specific units for voltage, current, power, and impedance measurements.

This article investigates the impedance of the three standard passive circuit components (R, L, and C) as well as the frequency response of a PCB trace.

This part II of the s-parameter tutorial presents several examples of the s-parameter use in EMC measurements and testing.

In this article we investigate the frequency behavior of a ceramic capacitor.

For common-impedance coupling to occur, two circuits must share a current path (with a non-negligible impedance)

This article discusses the topology and characteristics of a dc Line Impedance Stabilization Network (LISN), often referred to as an Artificial Network (AN).

At low frequencies, current takes the shortest path home. At high frequencies, it abandons direct routes for minimal inductance paths beneath traces. Ground plane discontinuities create radiation havoc—measurements prove theory right.

Reducing the duty cycle (the pulsewidth) reduces the low-frequency spectral content of the waveform, but does not affect the high-frequency content.