📡
Frequency
334 MHz
Frequency
334 MHz
🧭
Range
331–380 MHz
Range
331–380 MHz
🧩
Band Group
UHF (300–1000 MHz)
Band Group
UHF (300–1000 MHz)
🌐 Summary
The 334 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: 334 MHz: Aviation nav aids, radar; government/military systems (country-specific); UHF AM comms, datalinks; Weather radar, automotive radar.
Within ILS glideslope allocation (≈329.15–335.0 MHz) paired with 108–112 MHz localizers for precision approaches.
🔍 Explore the full RF Spectrum database
📡 Band & Geometry key
| Field | Value |
|---|---|
| Wavelength (m) | 0.898 |
| Waveforms | – |
| Antenna Form Factor (Typical) | ¼-wave ≈ 22.5 cm |
| Band Family | Aeronautical |
| Band | Aeronautical radionavigation / Radiolocation (UHF) |
| Primary Common Name | Aeronautical radionavigation, Radiolocation |
| FSPL @ 1 km [dB] | 82.914929336231 |
| FSPL @ 10 km [dB] | 102.91492933623 |
| Fresnel Radius @ 1 km (m) | 14.984582895459 |
| Band Group | UHF (300–1000 MHz) |
| Tax Band Family | UHF |
| Tax Band Class | VHF/UHF Band |
🧩 Applications & Usage
| Field | Value |
|---|---|
| Primary Application | Aviation nav aids, radar; government/military systems (country-specific) |
| Lower Neighbor Use | UHF low (Land mobile/Fixed) |
| Upper Neighbor Use | PPDR / TETRA (Land mobile) |
| Typical Services Devices | UHF AM comms, datalinks |
| Market Common Devices | Weather radar, automotive radar |
| Refarming Use | No |
| Device Ecosystem Size | Medium |
| Device Hotspots (MHz) | 334 |
| Device Category | Specialized Industrial / Scientific 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 | Specialized Industrial / Scientific Equipment |
| 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 | Within ILS glideslope allocation (≈329.15–335.0 MHz) paired with 108–112 MHz localizers for precision approaches. |
| Propagation Notes | Strong coverage, good indoor penetration |
⚙️ Technical Rules
| Field | Value |
|---|---|
| Lower Band Frequency Limit | 331 |
| Upper Band Frequency Limit | 380 |
| EIRP Indoor Limits | Prohibited (ILS glide) |
| EIRP Outdoor Limits | Prohibited (ILS glide) |
| PSD Limit | — |
| Emission Mask Class | Aeronautical NAV (protected) |
| Guardband Minimum [kHz] | 25 |
| 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 | Simplex |
| Duplexing Information | Simplex: downlink only |
| 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 radionavigation, Radiolocation |
| ITU Region 2 | Aeronautical radionavigation, Radiolocation |
| ITU Region 3 | Aeronautical radionavigation, Radiolocation |
| License Type | Aeronautical/military — licensed, safety-of-life |
| Primary Application | Aviation nav aids, radar; government/military systems (country-specific) |
| Primary Services | – |
| Spurious Emission [dBm] | -30 (baseline) |
| Lower Neighbor Use | UHF low (Land mobile/Fixed) |
| Upper Neighbor Use | PPDR / TETRA (Land mobile) |
| 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 | Government / Public Safety |
| Market Common Devices | Weather radar, automotive radar |
| Fresnel Radius (1st, 1 km) [m] | 14.984582895459 |
| Typical Bandwidths (Estimated) | 12.5, 25 kHz |
| Auction Status | Assigned |
| Refarming Use | No |
| Typical Site Spacing km | – / – |
| Device Ecosystem Size | Medium |
| Traffic Load Share | Coverage-heavy, low capacity share |
| Device Hotspots (MHz) | 334 |
| Device Category | Specialized Industrial / Scientific 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 | Specialized Industrial / Scientific Equipment |
| Antenna Form Factor (Typical) | ¼-wave ≈ 22.5 cm |
| Power Source Or Duty Profile (Typical) | – |
🛡️ Regulatory & Neighbors
| Field | Value |
|---|---|
| Lower Band Frequency Limit | 331 |
| Upper Band Frequency Limit | 380 |
| Rx Blocking Min dBm | -15 (planning) |
| Lower Neighbor Use | UHF low (Land mobile/Fixed) |
| Upper Neighbor Use | PPDR / TETRA (Land mobile) |
| Lower Neighbor Band | UHF low (Land mobile/Fixed) |
| Lower Neighbor Range | 316.000–330.000 MHz |
| Upper Neighbor Label | PPDR / TETRA (Land mobile) |
| Upper Neighbor Range | 381.000–400.000 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 | – |
| Auction Status | Assigned |
| Guard Or Pair | – |
📈 Market & Measurements
| Field | Value |
|---|---|
| Noise Floor | -110 dBm (est.) |
| Interference Cases | – |
| Lower Neighbor Range | 316.000–330.000 MHz |
| Upper Neighbor Range | 381.000–400.000 MHz |
| Interference Notes | Coordination with civil allocations at edges |
| Market Licensing Model | Government / Public Safety |
| Market Commercial Value | High |
| Market Common Devices | Weather radar, automotive radar |
| Market Deployment Density | Medium |
| Noise Floor (Estimated) | -110 dBm (est.) |
| Market Commercial Value (Estimated) | High |
| Ecosystem Maturity | Established |
| 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 ≈ 22.5 cm |
| Ecosystem Maturity | Established |
| 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) | – |
