5G mmWave Band n257 (28 GHz)

5G mmWave Band n257 (28 GHz) is a frequency band defined for Millimeter-Wave communication in 5G-NR networks

5G Band n257 Details:

5G Band Name

Band n257 (28 GHz)

Duplex Mode


Operating Band (MHz)

26500 to 29500 MHz


2054167 to 2104166

Supported Channel Bandwidths

50 100 200 400 MHz

Band n257 Overview

The mmWave 28 GHz band is a widely trialled / tested 5G band. Development of mmWave 28 GHz band is ongoing and is headed up by the 3GPP TR 38.815. Like all mmWave bands, n257 is intended for short range transmission at high data rates.

Popularity and interest in mmWave 28 GHz band is largely due to:

  • Availability of Spectrum : large portions of the spectrum are underutilised, allowing several hundred megahertz to be dedicated to 5G services
  • Device Complexity: of available mmWave bands, 26 & 28 GHz bands are lowest frequency bands available, offering better propagation & reduced device complexity
  • Global Harmonisation: of the available mmWave bands, the 28 GHz frequency range is available in the greatest number of countries across the globe.

Creating a single 2x GHz band standard would not be practical: to cover the entire 24.25 to 29.50 GHz range would require RF devices to handle a 5.25 GHz wide bandwidth. Therefore three bands were defined to cover the three geographical groups:

  • n257: Covers 26.5 to 29.5 GHz for Japan, North America, and South Korea
  • n258: Covers 24.25 to 27.5 GHz for Europe and China
  • n261: Covers narrower 27.5 to 28.35 GHz for operation alongside n260 (39 GHz) in the USA
5G-NR mmWave Band n257
Availability of 28 GHz Spectrum, graphic credit to CEPT

5G FR2 mmWave coverage

5G “millimeter wave” (mmWave) in the 24 GHz, 26GHz, 28GHz, 38-40GHz range use higher frequencies than 4G, and as a result, some 5G signals are not capable of traveling large distances (over a few hundred meters), unlike 4G or lower frequency 5G signals (sub 6 GHz). This requires placing 5G base stations every few hundred meters in order to use higher frequency bands. Also, these higher frequency 5G signals cannot penetrate solid objects easily, such as cars, trees, and walls, because of the nature of these higher frequency electromagnetic waves. 5G cells can be deliberately designed to be as inconspicuous as possible, which finds applications in places like restaurants and shopping malls

5G Frequency Bands

5G Frequency Bands

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