Michael G. Biggs, Frank H. Sanders, and Bradley J. Ramsey

Abstract: This report provides the results of radio spectrum measurements performed to characterize the aggregate signal emissions present in the 2400–2500 MHz industrial, scientific, and medical (ISM) band and adjacent frequency bands. These measurements were performed at locations near Denver, Colorado, and Los Angeles, California, and included various frequency domain and time domain tests utilizing omni–directional and directive antennas. The information contained in this report can serve as an aid to designers developing equipments to operate in these frequency bands, as well as authorities seeking to enhance compatibility between ISM devices and other radio services.

It should be noted that the frequency bands 2400–2402, 2402–2417 and 2417–2450 MHz have recently been reallocated from Federal use to non–Federal use in response to the requirements of Title IV — Communications Licensing and Spectrum Allocation Improvement — of the Omnibus Budget Reconciliation Act of 1993. This further enhances the attractiveness of these frequency bands to equipment manufacturers.

Keywords: microwave ovens; Industrial, Scientific and Medical (ISM) Equipment; aggregate environment; 2400–2500 MHz band

Disclaimer: Certain commercial equipment, components, and software may be identified in this report to specify adequately the technical aspects of the reported results. In no case does such identification imply recommendation or endorsement by the National Telecommunications and Information Administration, nor does it imply that the equipment or software identified is necessarily the best available for the particular application or uses.

For questions or information on this or any other NTIA scientific publication, contact the ITS Publications Office at ITSinfo@ntia.gov or 303-497-3572.

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