📡
Frequency
300 MHz
Frequency
300 MHz
🧭
Range
225–300 MHz
Range
225–300 MHz
🧩
Band Group
UHF (300–1000 MHz)
Band Group
UHF (300–1000 MHz)
🌐 Summary
The 300 MHz allocation is part of the UHF (300–1000 MHz) spectrum. This range is used worldwide for critical applications that keep our communications and infrastructure running smoothly. On this page we highlight how each band is applied in real systems, from regulatory assignments to everyday devices. Our goal is to make spectrum data clear and practical for engineers, regulators, and enthusiasts alike.
Key uses of this band include: 300 MHz: UHF AM comms, datalinks; Communication equipment, various devices.
Still inside the UHF military aeronautical range (225–400 MHz); above 300 MHz, similar usage persists with AM channelization.
🔍 Explore the full RF Spectrum database
📡 Band & Geometry key
| Field | Value |
|---|---|
| Wavelength (m) | 1 |
| Waveforms | – |
| Antenna Form Factor (Typical) | ¼-wave ≈ 25.0 cm |
| Band Family | Aeronautical |
| Band | Aeronautical mobile (OR) (military air) |
| Primary Common Name | Aeronautical mobile (OR) (military air) |
| FSPL @ 1 km [dB] | 81.982425094393 |
| FSPL @ 10 km [dB] | 101.98242509439 |
| Fresnel Radius @ 1 km (m) | 15.810924493316 |
| Band Group | UHF (300–1000 MHz) |
| Tax Band Family | UHF |
| Tax Band Class | VHF/UHF Band |
🧩 Applications & Usage
| Field | Value |
|---|---|
| Primary Application | – |
| Lower Neighbor Use | Land mobile / Fixed |
| Upper Neighbor Use | UHF low (Land mobile/Fixed) |
| Typical Services Devices | UHF AM comms, datalinks |
| Market Common Devices | Communication equipment, various devices |
| Refarming Use | No |
| Device Ecosystem Size | Medium |
| Device Hotspots (MHz) | 300 |
| Device Category | Avionics / Radar Equipment |
| Typical Use Cases | – |
| Modulation (Device) | Varies by device |
| Channel Width (Device) [kHz] | Varies |
| Device Region Profiles | Varies by country / allocation |
| Per-Region EIRP Or Duty (Device) | Varies by regulation |
| Allocation Relevance (Device) | Medium |
| Adjacent-Band Collision Risks (Device) | Low–Moderate |
| Example Devices Or Skus | Radar Altimeters, Military Radar |
| Common Protocols | VHF AM Voice (8.33 kHz); VDL Mode 2 (select freqs) |
🗒️ Notes
| Field | Value |
|---|---|
| Receiver Selectivity Notes | – |
| Interference Notes | Coordination with civil allocations at edges |
| Compatibility Risk Notes | Aviation-critical service nearby/in-band |
| Notes | Still inside the UHF military aeronautical range (225–400 MHz); above 300 MHz, similar usage persists with AM channelization. |
| Propagation Notes | Strong coverage, good indoor penetration |
⚙️ Technical Rules
| Field | Value |
|---|---|
| Lower Band Frequency Limit | 225 |
| Upper Band Frequency Limit | 300 |
| EIRP Indoor Limits | N/A (licensed; verify national rules) |
| EIRP Outdoor Limits | N/A (licensed; verify national rules) |
| PSD Limit | — |
| Emission Mask Class | Generic (planning) |
| Guardband Minimum [kHz] | 100 |
| Typical Bandwidths | 12.5, 25 kHz |
| Autocalculated Bandlimits | No |
| Typical Bandwidths (Estimated) | 12.5, 25 kHz |
| Max EIRP [dBm] | Varies by regulation |
| Power Source Or Duty Profile (Typical) | – |
| Channelization Plan | – |
| Channelization | – |
| Guard Band Requirement | – |
| OOB Emission Limit [dBm/MHz] | -13 (baseline) |
| Spurious Emission Limit (dBm) | -30 (baseline) |
| RX Blocking Min [dBm] | -15 (planning) |
| Duplexing | TDD |
| Duplexing Information | TDD: 225.0-300.0 MHz (unpaired) |
| Uplink Pairing | – |
| Downlink Pairing | – |
| Paired Band Info | – |
| Max EIRP [dBm] | – |
| Channelization Block Size | – |
| 3GPP Band Number | |
| Example 3GPP Bands | – |
| LTE Uplink Bands | – |
| LTE Downlink Bands | – |
| NR Uplink Bands | – |
| NR Downlink Bands | – |
| Guard Bands | – |
| Protocol Or Standard | – |
🌎 Country Overrides
| Field | Value |
|---|---|
| Tax Service Category | Other / Various |
| Tax License Type | Safety-of-Life |
| Tax Regions | Global / Varies |
| ITU Region 1 | Aeronautical mobile (OR) |
| ITU Region 2 | Aeronautical mobile (OR) |
| ITU Region 3 | Aeronautical mobile (OR) |
| License Type | Aeronautical service (licensed, safety-of-life protected) |
| Primary Application | – |
| Primary Services | – |
| Spurious Emission [dBm] | -30 (baseline) |
| Lower Neighbor Use | Land mobile / Fixed |
| Upper Neighbor Use | UHF low (Land mobile/Fixed) |
| Licensing Model | Licensed (Military aeronautical) |
| Typical Services Devices | UHF AM comms, datalinks |
| US FCC Alloc | -– |
| CA IC Alloc | -– |
| UK Ofcom Alloc | -– |
| US Ref | – |
| Typical Bandwidths | 12.5, 25 kHz |
| Market Licensing Model | Exclusive Licensed |
| Market Common Devices | Communication equipment, various devices |
| Fresnel Radius (1st, 1 km) [m] | 15.810924493316 |
| Typical Bandwidths (Estimated) | 12.5, 25 kHz |
| Auction Status | Auctioned |
| Refarming Use | No |
| Typical Site Spacing km | – / – |
| Device Ecosystem Size | Medium |
| Traffic Load Share | Coverage-heavy, low capacity share |
| Device Hotspots (MHz) | 300 |
| Device Category | Avionics / Radar Equipment |
| Typical Use Cases | – |
| Typical Center Frequencies [MHz] | – |
| Rule Part (Fcc Or Region) | – |
| Modulation (Device) | Varies by device |
| Channel Width (Device) [kHz] | Varies |
| Device Region Profiles | Varies by country / allocation |
| Per-Region EIRP Or Duty (Device) | Varies by regulation |
| Allocation Relevance (Device) | Medium |
| Adjacent-Band Collision Risks (Device) | Low–Moderate |
| Example Devices Or Skus | Radar Altimeters, Military Radar |
| Antenna Form Factor (Typical) | ¼-wave ≈ 25.0 cm |
| Power Source Or Duty Profile (Typical) | – |
🛡️ Regulatory & Neighbors
| Field | Value |
|---|---|
| Lower Band Frequency Limit | 225 |
| Upper Band Frequency Limit | 300 |
| Rx Blocking Min dBm | -15 (planning) |
| Lower Neighbor Use | Land mobile / Fixed |
| Upper Neighbor Use | UHF low (Land mobile/Fixed) |
| Lower Neighbor Band | Land mobile / Fixed |
| Lower Neighbor Range | 216.000–225.000 MHz |
| Upper Neighbor Label | UHF low (Land mobile/Fixed) |
| Upper Neighbor Range | 301.000–314.000 MHz |
| Adjacent-Band Collision Risks (Device) | Low–Moderate |
| Real-World Range (Indoor/Outdoor) | – |
| US FCC Alloc | — |
| CA IC Alloc | — |
| UK Ofcom Alloc | — |
| Regulatory References | US: -; CA: -; UK: – |
| Global Harmonization | Regional |
| Crossborder Coordination | High |
| Sharing Mechanism | Exclusive licensed |
| Auction Status | Auctioned |
| Guard Or Pair | – |
📈 Market & Measurements
| Field | Value |
|---|---|
| Noise Floor | -110 dBm (est.) |
| Interference Cases | – |
| Lower Neighbor Range | 216.000–225.000 MHz |
| Upper Neighbor Range | 301.000–314.000 MHz |
| Interference Notes | Coordination with civil allocations at edges |
| Market Licensing Model | Exclusive Licensed |
| Market Commercial Value | High |
| Market Common Devices | Communication equipment, various devices |
| Market Deployment Density | High |
| Noise Floor (Estimated) | -110 dBm (est.) |
| Market Commercial Value (Estimated) | High |
| Ecosystem Maturity | Mature |
| Indoor Penetration | Good |
| Known Interference | No major interference issues noted |
| Device Ecosystem Size | Medium |
| Real-World Range (Indoor/Outdoor) | – |
| Antenna Form Factor (Typical) | ¼-wave ≈ 25.0 cm |
| Ecosystem Maturity | Mature |
| Device Ecosystem Size | Medium |
| Chipset Availability | Limited / TBD |
| Operator Deployments | Limited operators |
| Technology Generations Deployed | Multiple / TBD |
| Roaming Support | – |
| Traffic Load Share | Coverage-heavy, low capacity share |
| Indoor Penetration | Good |
| Known Interference | No major interference issues noted |
| Occupancy | Medium |
| Occupancy Bucket Pct | 10–30% |
| Latency Profile | – |
| Common Channels Or Profiles | – |
| Security Features | – |
| Lbt Or Fhss Requirement | – |
| Popularity (Installed Base) | – |
| Coexistence Tips | – |
| Latency Class | – |
| Device Hotspots (Scoped && Tagged) | – |
