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EMC Concepts Explained

Circuit Theory Model of Ringing on a Transmission Line

This article uses a classical circuit-theory model of a series RLC circuit to explain the phenomenon of ringing on a transmission line, or a PCB trace.

Transmission Line Reflections: Bounce Diagram

This article explains the creation of a bounce diagram for a transmission line circuit (see [1] for transmission line reflections).

S-Parameters Tutorial – Part II: EMC Measurements and Testing

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

S-Parameters Tutorial – Part I: Fundamental Background

This s-parameters tutorial consists of two parts: Part I discusses the fundamental background needed to understand the concept of s-parameters; Part II explains the s-parameters use in EMC measurements and testing

EMI Reduction by Spread-Spectrum Frequency Dithering

This article examines the spread-spectrum frequency dithering technique to reduce the EMI noise from a SMPS.
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Bulk Current Injection (BCI) – Substitution Method and Closed-Loop Method with Power Limitation

This column explores the conducted immunity test known as a Bulk Current Injection (BCI) test, according to ISO 11452-4 specification.

SMPS Input Filter Design: Negative Resistance Approach

This article discusses a practical approach to designing an input filter to the switch-mode power supply (SMPS).

Near-Field Shield Effectiveness Evaluation Using H-Field Probe

We compare the shielding effectiveness of various solid metallic shields by direct H-field measurements in the near field of the source.

Impact of a Trace Length on Capacitor Frequency Response

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

Guard Trace Impact on Crosstalk Between PCB Traces

This article discusses the crosstalk reduction between PCB traces by utilizing a guard trace between the traces and investigating the effect of the guard trace grounding.
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