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5G frequencies

There

is a crucial difference between the classic mobile radio networks

of the

first generations and the mobile radio network of

the

5th

generation

(5G): While the classic mobile radio networks are designed for one frequency range

, the mobile radio network of the 5th generation uses several transmission frequencies, depending on the population density and the distances that can be covered.5G mobile radio networks can operate in the UHF frequency range at 700 MHz, in the microwave range

at2.1 GHz and 3.6 GHz and at SHF frequencies of 26 GHz. The 700 MHz frequencies resulting from the Digital Dividend are suitable for area broadcasting with low population density. In the 700 MHz range, the frequencies from 703 MHz to 733 MHz and from 758 MHz to 788 MHz are used. The aim is to cover as large an area and as many villages as possible with a small number of mobile radio masts. The achievable ranges can be up to 20 km, depending on the landscape topology. The bandwidths for 700 MHz transmission allow only limited data rates

.

5G frequency ranges

5G frequency ranges

Ingeneral, the propagation of electromagnetic waves is limited by free-space attenuation, which has a strong frequency dependence. At 700 MHz and a distance of 100 m it is about 70 dB

and at 1 km distance the value increases by another 20 dB. In order to be able to serve a higher density of mobile radio devices with higher data rates in small towns, frequencies of 2.1 GHz are therefore used in this range. The 2.1 GHz frequency range is shared by the 5G providers Vodafone, O2 Telefonica, Drillisch and Deutsche Telekom. The uplink frequencies are between 1.92 GHz and 1.98 GHz, and the downlink frequencies are between 2.11 GHz and 2.17 GHz. In this frequency range, the bridgeable distances are smaller than at 700 MHz because the free-space attenuation is much higher. At 100 m, it is already around 80 dB. In terms of large cities, 5G mobile services focus on high population density and high data rates. Both characteristics can be realized with transmission frequencies of 3.4 GHz to 3.7 GHz. The small distances that can be bridged play a subordinate role here. In order to be able to serve concentrated gatherings of people, such as those in stadiums, train stations, airports and trade fair grounds, with mobile communications, 5G will also transmit in the millimeter-wave range at 26 GHz. In Europe, the frequency range between 24.25 GHz and 27.5 GHz is intended for this purpose. This makes it possible for thousands and thousands of 5G mobile subscribers to communicate simultaneously. As far as free space attenuation in this frequency range is concerned, it is 80 dB at 10 m, 87 dB at 20 m and 100 dB at 100 m.

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Englisch: 5G frequencies
Updated at: 20.01.2021
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