ISM Radio Bands: Will the Concept Work in the Future?

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  • Author: Tom Perkins
We sometimes tend to forget that RF and microwave devices are now everywhere. High Frequency technology no longer consists of expensive, sometimes unreliable, “magic” hardware only available for defense applications and a few serious hobbyists. In order to regulate anticipated usage by various low power devices, the Industrial, Scientific and Medical (ISM) portions of the electromagnetic spectrum were established by the International Telecommunication Union Radio Sector (ITU-R) in 5.138, 5.150, and 5.280 Radio Regulations and first adopted in May 1985 by the US Federal Communications Commission (FCC). In addition to the venerable microwave oven operating at approximately 2.45 MHz, in recent years many other modern applications have been authorized in these and other bands.