Search results
Results from the WOW.Com Content Network
This image or file is a work of a United States Department of Commerce employee, taken or made as part of that person's official duties. As a work of the U.S. federal government , the image is in the public domain .
In addition to radio frequencies used to connect handsets with cellular base stations, other parts of the radio spectrum are used to interconnect base stations and the wired telephone network. Some frequency bands may be vulnerable to interference by existing services in adjacent frequency bands, such as UHF television broadcasting.
Frequency allocation (or spectrum allocation) is the part of spectrum management dealing with the designation and regulation of the electromagnetic spectrum into frequency bands, normally done by governments in most countries. [1] Because radio propagation does not stop at national boundaries, governments have sought to harmonise the allocation ...
File:United States Frequency Allocations Chart 2003 - The Radio Spectrum.svg. Add languages. Page contents not supported in other languages. ... Download QR code ...
In the United States, the 13 cm band comprises frequencies in two segments stretching from 2.300 to 2.310 GHz, and from 2.390 to 2.450 GHz. [6] ( The segment from 2.310 to 2.390 GHz was withdrawn from the amateur service and reallocated to direct satellite radio broadcasting, e.g., Sirius XM Radio.)
In certain urban areas, additional UHF allocations in the 422-430 MHz band (areas: Buffalo, New York, Detroit, Michigan and Cleveland, Ohio) and/or the 470-512 MHz UHF-T band are also available. These allocations are assigned to other services in the vast majority of the United States. Detroit metro area and Cleveland metro area:
The list of frequency ranges is called a band allocation, which may be set by international agreements, and national regulations. The modes and types of allocations within each frequency band is called a bandplan; it may be determined by regulation, but most typically is set by agreements between amateur radio operators.
In the ITU Table of Frequency Allocations, no formal allocation to any radio service is present above 275 GHz, although the regulations themselves cover up to 3,000 GHz (3 THz). However, a number of administrations permit amateur radio experimentation within the 275–3,000 GHz range on a national basis, under license conditions that are ...