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ZigBee frequency

The ZigBee network uses license-free ISM bands for transmission and can therefore be operated license-free. In Europe, it is the ISM band around 868 MHz that is used by various other technologies such as that for Short Range Devices (SRD), RFID, Wibree and other services. Worldwide, ZigBee uses the frequency range of 2.4 GHz

and in the United States the ISM range around 915 MHz. As for the ISM band used worldwide at 2.4 GHz, the frequency band

isbetween 2.405 GHz and 2.480 GHz. This frequency band is used by various short-range wireless technologies

. For example, by ZigBee, which is standardized in the radio interface according to IEEE 802.15.4, by Bluetooth and WLANs according to IEEE 802.11

.

Transmission ranges and channel widths of Z

Transmission ranges and channel widths of Z

igBeeIn ZigBee, the 2.4 GHz frequency band is divided into 16 channels with a channel spacing of 5 MHz. On each of the sixteen channels, the data transmission rate is 250 kbit/s. The frequency bands used in Europe are 433 MHz and 868 MHz. The higher frequency band is between 868 MHz and 870 MHz and has only one channel on which data can be transmitted with a data rate of

only 20 kbit/s. The frequency band used in the USA has a channel grid of 5 MHz. The frequency band used in the USA between 902 MHz to 920 MHz is divided into ten channels with a channel width of 2 MHz.

Frequency ranges and data rates of ZigBee

Frequency ranges and data rates of ZigBee

The different channel widths also result in different data rates. In the 868 MHz band with 2 MHz channel width, the data rate is 20 kbit/s, in the 915 MHz band 40 kbit/s and in the 2.4 GHz band 250 kbit/s. To avoid interference with the carrier frequencies of other services, ZigBee works in the 2.4 GHz range with phase shift

keyingand spread spectrum technology

tobetter protect the transmission against interference, or with Offset Quadrature Phase Shift Keying

(OQPSK) to achieve higher data rates. The range of ZigBee is between 10 m and 75 m, depending on the transmission power.

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Englisch: ZigBee frequency
Updated at: 11.07.2019
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