5G represents a groundbreaking shift in mobile communications—offering ultra-fast speeds, low
latency, and massive connectivity for a wide range of applications. Central to the 5G revolution
is its use of a broad spectrum of radio frequency bands, specifically allocated and optimized for
new levels of wireless performance.
Frequency Band Classifications
5G frequency bands are organized under standardized groupings based on their location in the
electromagnetic spectrum. These classifications play a significant role in determining network
capabilities and deployment strategies around the world.
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FR1 encompasses what is often called low (sub-1GHz) and mid-bands (1–7GHz).
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FR2 covers “millimeter wave” or high bands.
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FR3 was proposed at the 2023 World Radio Conference to cover previously unexploited
upper mid-bands, but as of mid-2025, is not yet standard
Band Types
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Low-Band (Sub-1 GHz): Provides broad coverage and excellent indoor penetration.
Examples: 600MHz, 700MHz, 800MHz.
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Mid-Band (1–6 GHz): Balances coverage and capacity; includes the key 3.5GHz band.
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High-Band (mmWave, above 24 GHz): Delivers extremely high speeds and very low
latency over short distances
Technical Details and Channel Bandwidths
5G New Radio (NR) utilizes advanced technologies such as Massive MIMO and network slicing,
with specific channel bandwidths per frequency range:
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Sub-6 GHz (FR1): Up to 100MHz bandwidth per channel.
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Millimeter Wave (FR2): Up to 400MHz or even higher, supporting large data streams
Band Types and Technical Utility
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Low-band (<1GHz, e.g., n71, n28): Exceptional for rural, suburban, and deep indoor
coverage. Lower frequency improves penetration and range, ideal for IoT and reliability.
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Mid-band (1–7GHz, e.g., n77, n78, n41): Offers the balance of coverage and capacity;
“workhorse” of global 5G.
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High-band (24–71GHz, e.g., n258, n260): Enables data rates exceeding 1Gbps, microlatency, and support for advanced use cases, but requires dense site deployments due to
path loss and limited penetration
Parameter
Sub-6 GHz (FR1)
mmWave (FR2)
Max Bandwidth
100MHz
400MHz (some up to 800–1600MHz in future)
Subcarrier Spacing 15, 30, 60kHz
60, 120kHz
Carrier Aggregation Yes, up to 1GHz
Yes, up to 1GHz
Duplexing Modes
FDD, TDD, SDL, SUL TDD (almost exclusively)
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Bandwidth Parts: FR1 supports narrow bandwidth parts for legacy or power-saving
devices within a wider overall 5G channel.
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Coding: 5G uses advanced coding—LDPC and polar codes—to maximize efficiency and
robustness.
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Carrier Aggregation: Up to 16 component carriers can be combined—totaling ~1GHz of
contiguous or non-contiguous spectrum.
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Spectral Efficiency: Guard bands are thinner, and 5G can operate efficiently in mixed,
shared, or dynamically reallocated spectrum pools
Regional Variations
Region Low Bands
Mid Bands
Europe 700MHz, 800MHz 3.4–3.8GHz (n78), 2.6GHz
US
High Bands (mmWave)
26GHz (24.25–27.5GHz)
600MHz, 850MHz 2.5GHz, 3.7–4.2GHz, C-Band 28GHz, 39GHz (n260, n261)
China 700MHz, 800MHz 2.6GHz, 3.3–3.6GHz, 4.9GHz 24.75–27.5GHz, 37–43.5GHz
Japan 700MHz
3.6–4.2GHz, 4.4–4.9GHz
28GHz
Korea 700MHz, 800MHz 3.4–3.7GHz
Operating bands
Below is the table showing NR operating bands
28GHz
Band Type Coverage Penetration Cell Radius
Use Case
Low-band Wide
Excellent
Up to 30km+
Rural, suburban, IoT
Mid-band Good
Good
1–5km
Urban, suburban, capacity
High-band Localized Poor
<500m (LoS only) Stadiums, hotspots, FWA
Unlicensed and Shared Spectrum
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5G NR-U (Unlicensed): Allows 5G deployment in unlicensed spectra (e.g., 5GHz, 6GHz),
supporting enterprise and private networks.
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Spectrum Sharing (Dynamic Spectrum Access): Enables adaptive allocation—coexistence
with Wi-Fi, LTE, satellite, radar, and legacy systems
The architecture and performance of the global 5G ecosystem depend fundamentally on
spectrum agility, depth, and careful engineering—balancing coverage, capacity, and technical
innovation. As regulators sunset old network generations and innovate with reframed and
shared spectrum, and as FR3 and other bands come into play, 5G will continue to expand its
reach and capability. The choices made today in policy and engineering will set the course for
everything from rural IoT and smart cities to the fastest immersive experiences in dense urban
cores
References:
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3GPP TS 38.101-1: Technical specifications and band definitions for 5G NR Frequency
Range 1 (FR1).
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3GPP TS 38.101-2: Technical specifications and band definitions for 5G NR Frequency
Range 2 (FR2).
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3GPP TS 38.104: Base Station (BS) radio transmission and reception for NR, defining all
bands and parameters.
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3GPP TS 38.133: Requirements for support of radio resource management in NR,
including band-specific performance.
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3GPP TS 38.101-3: Technical specifications for frequency bands above 52.6 GHz
(potential future FR3).
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ITU-R M.1036: Frequency arrangements for implementation of IMT for 5G, providing
global harmonization of band allocations.
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ITU-R M.2083: IMT Vision framework and objectives, including 5G frequency spectrum
requirements.
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ITU-R M.2012: Detailed technical characteristics for IMT-Advanced, reference for NR
coexistence.
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ITU-R M.2290: Spectrum requirements methodology for IMT-2020 (5G).
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ITU-R M.2100: Technical requirements for IMT-2020 radio interfaces, relevant to 5G NR
band usage.