5G NR N257 (mmWave 28 GHz)
The 5G NR frequency band n257, also known as the 28 GHz band, is a millimeter wave (mmWave) band used for 5G communications. Here is a summary of its key characteristics:
- Frequency Range: The band spans from 26.50 GHz to 29.50 GHz.
- Bandwidth: It has an available bandwidth of 850 MHz.
- Channel Bandwidths: The channel bandwidths supported are 50 MHz, 100 MHz, 200 MHz, and 400 MHz.
- Duplex Mode: It operates in Time Division Duplexing (TDD) mode, which means that both uplink and downlink signals share the same frequency band.
- Technical Challenges: Due to its high frequency, the 28 GHz band faces challenges such as limited range and difficulty in penetrating solid objects, requiring closer placement of base stations and specialized infrastructure.
This band is one of the most tested and developed for 5G, with ongoing research and development to overcome its technical limitations and enhance its performance.
