Licensing is conducted by a broadcasting authority (a government agency) to manage the radio-frequency spectrum and implement public policy, such as that regarding the concentration of media ownership.

The major drawback of digital transmission has been that it requires a lot of space on the radio-frequency spectrum, and such space is in short supply.

The International Telecommunication Union (ITU) helps managing the radio-frequency spectrum internationally.

However, those rules are concerned only with the device's performance as an unintentional radiator into the radio-frequency spectrum.

To a human observer the desert sky remained pitch-black, but in the radio-frequency spectrum, the sky had gone mad.

In the radio-frequency spectrum the immediate vicinity of the warehouse had gone mad.

A Finite Resource From the Government's perspective, the problem is that the radio-frequency spectrum is a finite resource, which must be carefully parceled out.

Spectrum-Sensing Cognitive Radio, in which only the radio-frequency spectrum is considered.

To receive and expeditiously dispose of applications for the use of radio-frequency spectrum.

The decision was announced earlier this year, but carrying it out has been at least temporarily delayed by technical questions, costs and competition for space on the radio-frequency spectrum.