Publication

Low-Cost Electromagnetic Interference Source Localization Using Time Reversal

2025

Abstract

Practical implementations of electromagnetic interference source localization, including transient events such as electrostatic discharges, have a wide range of industrial applications. We show the experimental localization of both timeharmonic and transient sources using low-cost measurement equipment, including a software-defined radio for GHz-range time-domain measurements, combined with the time-reversal method. The backpropagation stage of time reversal is achieved using experimental data, eliminating the need for a computational model of the device under test.

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2025

Abstract

Official source

Related concepts (32)

Electrostatic discharge

Electrostatic discharge (ESD) is a sudden and momentary flow of electric current between two electrically charged objects caused by contact, an electrical short or dielectric breakdown. A buildup of static electricity can be caused by tribocharging or by electrostatic induction. The ESD occurs when differently-charged objects are brought close together or when the dielectric between them breaks down, often creating a visible spark.

Backpropagation

As a machine-learning algorithm, backpropagation performs a backward pass to adjust the model's parameters, aiming to minimize the mean squared error (MSE). In a single-layered network, backpropagation uses the following steps: Traverse through the network from the input to the output by computing the hidden layers' output and the output layer. (the feedforward step) In the output layer, calculate the derivative of the cost function with respect to the input and the hidden layers.

Electric discharge

In electromagnetism, an electric discharge is the release and transmission of electricity in an applied electric field through a medium such as a gas (ie., an outgoing flow of electric current through a non-metal medium). The properties and effects of electric discharges are useful over a wide range of magnitudes. Tiny pulses of current are used to detect ionizing radiation in a Geiger–Müller tube. A low steady current can be used to illustrate the spectrum of gases in a gas-filled tube.