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ISM Frequency Bands

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- everything RF

Apr 24, 2018

ISM stands for Industrial, Scientific and Medical. The ITU (International Telecommunication Union) had originally reserved a portion of the RF spectrum globally for industrial, scientific and medical applications.

The use case was followed initially, however over the years, the use of the ISM Bands become more widespread for short-range, low power wireless communications systems like cordless phones, WiFi, Bluetooth, NFC and a host of other short range wireless applications.

ISM Frequency Bands

Frequency RangeBandwidthCenter FrequencyAllocation
6.765 - 6.975 MHz0.03 MHz6.78 MHzLocally Administered
13.553 - 13.567 MHz0.014 MHz13.56 MHzGlobal
26.957 - 27.283 MHz0.326 MHz27.18 MHzGlobal
40.66 - 40.7 MHz0.04 MHz40.68 MHzGlobal
433.05 - 434.79 MHz1.74 MHz433.92 MHzEurope, Africa, Russia
902 - 928 MHz26 MHz915 MHzAmericas
2400 - 2500 MHz100 MHz2450 MHzGlobal
5725 - 5875 MHz150 MHz5800 MHzGlobal
24 - 24.250 GHz250 MHz24.125 GHzGlobal
61 - 61.5 GHz500 MHz61.250 GHzLocally Administered
122 - 123 GHz1000 MHz122.5 GHzLocally Administered
244 - 246 GHz2000 MHz245 GHzLocally Administered