The
electromagnetic spectrum is an aspect of the physical world, like land, water, and air. It is a resource, limited by its usability. Use of
radio frequency bands of the
electromagnetic spectrum is regulated by governments in most countries, in a process known as frequency allocation or spectrum allocation. Like weather and internationally traded goods,
radio propagation and RF technology do not stop at national boundaries. Giving technical and economic reasons, governments have sought to harmonise spectrum allocation standards.
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