Radio waves are defined by the ITU as: "electromagnetic waves of frequencies arbitrarily
lower than 3000 GHz, propagated in space without artificial guide", Radio Regulations, 2020 Edition. International Telecommunication Union. Archived from the original on 2022-02-18. Retrieved 2022-02-18.
ITU Radio Regulations, Volume 1, Article 2; Edition of 2020. Available online at "Article 2.1: Frequency and wavelength bands"(PDF). Radio Regulations 2016 Edition. International Telecommunication Union. 1 January 2017. Archived from the original on 18 February 2022. Retrieved 18 February 2020.
AFR 55-44/AR 105-86/OPNAVINST 3430.9A/MCO 3430.1, 27 October 1964 superseded by AFR 55-44/AR 105-86/OPNAVINST 3430.1A/MCO 3430.1A, 6 December 1978: Performing Electronic Countermeasures in the United States and Canada, Attachment 1,ECM Frequency Authorizations.
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Radio waves are defined by the ITU as: "electromagnetic waves of frequencies arbitrarily
lower than 3000 GHz, propagated in space without artificial guide", Radio Regulations, 2020 Edition. International Telecommunication Union. Archived from the original on 2022-02-18. Retrieved 2022-02-18.
ITU Radio Regulations, Volume 1, Article 2; Edition of 2020. Available online at "Article 2.1: Frequency and wavelength bands"(PDF). Radio Regulations 2016 Edition. International Telecommunication Union. 1 January 2017. Archived from the original on 18 February 2022. Retrieved 18 February 2020.