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emc concepts explained

Dipole-Type Antennas in EMC Testing: Part II

Part II of this two-article series focuses on log-periodic and biconical antenna impedance, VSWR, and radiated emissions measurements.

Dipole-Type Antennas in EMC Testing

This two-article series is devoted to a dipole family of antennas used in EMC testing: half-wave dipole, quarter-wave monopole, log-periodic, and biconical antenna.

Basic EMC Rules

This article discusses the origins, justification, and interrelations between some of basic EMC rules regarding the highest significant frequency (bandwidth) present in digital signals, definition of the electrically short structures, and the transmission line criterion.

Impact of Decoupling Capacitors and Embedded Capacitance on Impedance of Power and Ground Planes: Part II

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

Impact of Decoupling Capacitors and Embedded Capacitance on Impedance of Power and Ground Planes: Part I

We investigate two four-layer PCBs with power and ground plane pairs spaced 3 mils and 30 mils apart.
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Skin Depth in Good Conductors

This tutorial article focuses on the skin depth phenomenon in good conductors. We begin with the uniform plane propagation, leading to the wave equations and their solutions in different media.

EMC Filters Comparison Part I: CL and LC Filters

This column discusses the second- and third-order low-pass EMC filters.

Balanced-Unbalanced Antenna Structures and Baluns

This article explains the operation of a balun that transforms an unbalanced antenna structure into a balanced one.

Impact of a Decoupling Capacitor in a CMOS Inverter Circuit

This article discusses CMOS inverter switching and shows the impact of a decoupling capacitor on the power rail signal integrity and radiated emissions.

Common-Mode Current Creation and Suppression

This article discusses the creation of a common-mode current in a typical circuit and explains the effectiveness of a common-mode choke on differential-mode and common-mode currents.
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