Radio noise

Radio noise

Electromagnetic Waves

Published in Goff Hill, The Cable and Telecommunications Professionals' Reference, 2012

The nonionized atmosphere surrounding the Earth, in addition to causing attenuation of electromagnetic waves, acts as a source of radio noise. For many terrestrial communications systems, this is of little importance because the receiving-antenna noise temperature is dominated by the noise temperature of the Earth. However, for satellite and space communications systems using low noise temperature antennas and receivers, the sky noise temperature plays an important role in determining the received carrier–to–noise power ratio.

A review on condition assessment technologies for power distribution network infrastructure

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Journal Information

Published in Structure and Infrastructure Engineering, 2023

Sahan Bandara, Pathmanathan Rajeev, Emad Gad

Each deterioration process in overhead lines is associated with different symptoms which need to be identified for assessing the condition. Among various symptoms, generation of partial discharge (PD) is identified as a sensitive and effective factor for determining overhead line defects. Discharges can be categorised into different groups depending on the mechanism of discharge generation such as transmission line corona, gap discharge, and contamination discharge. High frequency PDs generate radio noise into ultra-high frequency range and audible noise into ultra-sonic regions (Aggarwal et al., 2000). A wide range of condition assessment techniques are implemented for overhead lines such as aerial inspection, infrared inspection, PD detectors, ultrasonic detection, radio noise detection, audible noise meters, and many more.

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Electromagnetic Waves

A review on condition assessment technologies for power distribution network infrastructure