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Introduction to SNG and ENG Microwave by Jonathan Higgins

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Analogue theory

In telecommunications, the resource of electromagnetic spectrum – which is the basis of telecommunications – is commonly referred to as RF – an acronym for radio frequency. In our context, it does not refer to media such as radio stations and their broadcasts, but refers to the term used in the scientific sense, as defined in the dictionary, as ‘rays’ or ‘radiation’.

This can be confusing for non-scientists, but is in fact the original definition of radio. It has also been historically referred to as ‘airwaves’, or as the ‘ether’, and a specific frequency in the spectrum can be referred to as a ‘wavelength’. All these terms refer to electromagnetic spectrum.

Many of you will have heard of technologies associated with the word ...

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