Editing ISM radio band (section)

==History==
{{Expand section|date=September 2010}}
The ISM bands were first established at the International Telecommunications Conference of the [[ITU]] in [[Atlantic City]], [[1947]]. The American delegation specifically proposed several bands, including the now commonplace 2.4&nbsp;GHz band, to accommodate the then nascent process of microwave heating;<ref>{{Cite web|url=http://handle.itu.int/11.1004/020.1000/4.62.51.en.101| title=Documents of the International Radio Conference (Atlantic City, 1947) - Doc. No. 1-100 - No. 28 R-E| page=464}}</ref> however, FCC annual reports of that time suggest that much preparation was done ahead of these presentations.<ref>{{Cite report|title=Thirteenth Annual Report of the FCC, June 30, 1947|url=http://transition.fcc.gov/Bureaus/Mass_Media/Databases/documents_collection/annual_reports/1947.pdf|pages=8, 50–51|access-date=October 10, 2012|archive-url=https://web.archive.org/web/20130621164400/http://transition.fcc.gov/Bureaus/Mass_Media/Databases/documents_collection/annual_reports/1947.pdf|archive-date=June 21, 2013|url-status=dead}}</ref>

The report of the August 9th 1947 meeting of the Allocation of Frequencies committee<ref>{{Cite web|url=http://handle.itu.int/11.1004/020.1000/4.62.51.en.108| title=Documents of the International Radio Conference (Atlantic City, 1947) - Doc. No. 701-800 - No. 749 R-E| page=249}}</ref> includes the remark:

"The delegate of the United States, referring to his request that the frequency 2450 Mc/s be allocated for I.S.M., indicated that there was in existence in the United States, and working on this frequency a diathermy machine and an electronic cooker, and that the latter might eventually be installed in transatlantic ships and airplanes. There was therefore some point in attempting to reach world agreement on this subject."

Radio frequencies in the ISM bands have been used for communication purposes, although such devices may experience interference from non-communication sources. In the United States, as early as 1958 Class D [[Citizens Band]], a Part 95 service, was allocated to frequencies that are also allocated to ISM. [1]

In the U.S., the FCC first made unlicensed [[spread spectrum]] available in the ISM bands in rules adopted on May 9, 1985.<ref>{{Cite web|url=http://www.marcus-spectrum.com/documents/81413RO.txt |format=TXT |title=Authorization of Spread Spectrum Systems Under Parts 15 and 90 of the FCC Rules and Regulations |publisher=Federal Communications Commission |date=June 18, 1985 |access-date=2007-08-31 |url-status=dead |archive-url=https://web.archive.org/web/20070314063902/http://www.marcus-spectrum.com/documents/81413RO.txt |archive-date=March 14, 2007 }}</ref> The FCC action was proposed by Michael Marcus of the FCC staff in 1980 and the subsequent regulatory action took five more years. It was part of a broader proposal to allow civil use of spread spectrum technology and was opposed at the time by mainstream equipment manufacturers and many radio system operators.<ref>{{Cite web |url=http://www.iep.gmu.edu/UnlicensedWireless.php |title=The Genesis of Unlicensed Wireless Policy |publisher=George Mason University |date=April 4, 2008 |access-date=2008-04-20 |archive-url=https://web.archive.org/web/20080624025103/http://www.iep.gmu.edu:80/UnlicensedWireless.php |archive-date=June 24, 2008 |url-status=dead }}</ref>

Many other countries later developed similar regulations, enabling use of this technology. <ref>{{Cite web |last=McNeil |first=Peter |date=2021-12-16 |title=More on ISM Bands Around the World |url=https://blog.pasternack.com/radio-frequency-education-courses/more-on-ism-bands-around-the-world/ |access-date=2025-03-11 |website=Pasternack Blog |language=en-US}}</ref>