Theory and Principles

Methods and Effects of Magnetic Pulses on the Magnetoreception of Birds

The authors examine various hypotheses regarding avian magnetoreception and discuss experimental techniques to investigate potential sensory mechanisms for bird navigation.

Ohm’s Law Also Applies to ESD‑Induced Heat Pulses

Heat flow analysis for semiconductor ESD situations can be approximated to one dimension, and then captured with a generalized Ohm’s Law using a complex impedance. Methods can include time-dependent electrothermal pulses and feedback due to self-heating, with solutions readily carried out on any desktop computer.

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.

A Radio Frequency Application of Critical Damping Theory and Practice

EMC is sometimes termed the study of secondary effects that are ignored in college...

A Theory of Shielding Electromagnetic Waves: Revisiting Shielding Effectiveness Equations

In this article, we analyze the shielding effectiveness equations (SE = R + A...

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Theory of Equipment Grounding Impedance

Values for grounding impedance appear in many standards, including UL 478 and 1244, CSA...

Faraday’s Lines of Force and Maxwell’s Theory of the Electromagnetic Field

1408 F4 cover A note from the Editor: In celebration of the 150th Anniversary of Maxwell’s Equations, we are honored to bring you a chapter from the book The Life of James Clerk Maxwell, the 1882 original biography of James Clerk Maxwell. This chapter, entitled “Faraday’s Lines of Force and Maxwell’s Theory of the Electromagnetic Field,” provides a unique insight to Maxwell’s theory of electromagnetic fields.

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