📡
Frequency
1905 MHz
Frequency
1905 MHz
🧭
Range
1900–1920 MHz
Range
1900–1920 MHz
🧩
Band Group
1.9 GHz TDD
Band Group
1.9 GHz TDD
🌐 Summary
The 1905 MHz allocation is part of the 1.9 GHz TDD 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: Upper portion (1900-1920 MHz) of DECT/Band 39 allocation. Band 39 TDD cellular deployed in China for TD-LTE and 5G NR (China Mobile, China Unicom). Also supports DECT cordless phones where unlicensed. TDD operation with guard time between uplink and downlink. Full DECT/Band 39 range is 1880-1920 MHz (40 MHz total). Lower portion (1880-1899) primarily DECT cordless; upper portion (1900-1920) mixed DECT/Band 39 TDD..
Upper portion (1900-1920 MHz) of DECT/Band 39 allocation (full range: 1880-1920 MHz). Band 39 TDD primarily deployed in China (China Mobile, China Unicom) for TD-LTE and 5G NR. Also available for DECT cordless in regions where unlicensed. Lower portion (1880-1899 MHz) typically used for DECT cordless phones in Europe/Asia.
(Mobitex)
🔍 Explore the full RF Spectrum database
📡 Band & Geometry key
| Field | Value |
|---|---|
| Wavelength (m) | 0.15737136902887 |
| Waveforms | BPSK(1), BOC(1,1), MBOC – per system specs |
| Antenna Form Factor (Typical) | whip/stub antenna; TDD: similar to FDD cellular |
| Band Family | TDD Cellular (Band 39: 1880-1920 MHz) |
| Band | L‑Band |
| Primary Common Name | TDD Cellular Band 39 / DECT (1900-1920 MHz upper portion) |
| FSPL @ 1 km [dB] | 98.05 |
| FSPL @ 10 km [dB] | 118.05 |
| Fresnel Radius @ 1 km (m) | 6.272 |
| Band Group | 1.9 GHz TDD |
| Tax Band Family | IMT TDD (Band 39, 1900–1920 MHz) |
| Tax Band Class | Terrestrial Mobile (IMT) TDD (3GPP Band 39) (Mobitex) |
🧩 Applications & Usage
| Field | Value |
|---|---|
| Primary Application | DECT cordless phones (Europe); TD-LTE/5G NR TDD Band 39 (China, select regions) |
| Lower Neighbor Use | DECT cordless (1880-1899 MHz); below that: Band 3 DL (1805-1880) Europe/Asia or Band 2 UL (1850-1880) Americas |
| Upper Neighbor Use | AWS Downlink (2110–2180 MHz) |
| Typical Services Devices | handsets and bases; TD-LTE smartphones, IoT modules (China) |
| Market Common Devices | phones, baby monitors; TD-LTE smartphones, base stations (China) |
| Refarming Use | stable unlicensed use; TDD: TD-SCDMA being refarmed to TD-LTE/5G |
| Device Ecosystem Size | Large (100M+ devices); Band 39: Large in China |
| Device Hotspots (MHz) | 1897 (center); Band 39: 1900 (center) |
| Device Category | phones, base stations; TD-LTE UE and eNodeB (TDD) |
| Typical Use Cases | phones (); TDD mobile broadband, IoT (TD-LTE Band 39); private networks |
| Modulation (Device) | GFSK; TD-LTE: OFDMA (TDD); 5G NR: OFDM (TDD) |
| Channel Width (Device) [kHz] | 1728 kHz; TD-LTE: 5000-20000 kHz; NR: flexible |
| Device Region Profiles | Europe, Asia; Band 39: China primarily |
| Per-Region EIRP Or Duty (Device) | 24 dBm (250 mW); TDD: BS 33-43 dBm, UE 23-24 dBm |
| Allocation Relevance (Device) | High in Europe; Band 39: High in China |
| Adjacent-Band Collision Risks (Device) | co-channel interference management; TDD: guard time critical |
| Example Devices Or Skus | Panasonic, Gigaset phones; Band 39: Huawei, Xiaomi (China) |
| Common Protocols | ULE (); TD-LTE Band 39, TD-SCDMA (legacy) |
🗒️ Notes
| Field | Value |
|---|---|
| Receiver Selectivity Notes | adjacent channel rejection; TDD: per 3GPP specifications for Band 39 |
| Interference Notes | listen-before-talk coordination; TDD: guard time synchronization critical |
| Compatibility Risk Notes | 0 |
| Notes | Upper portion (1900-1920 MHz) of DECT/Band 39 allocation (full range: 1880-1920 MHz). Band 39 TDD primarily deployed in China (China Mobile, China Unicom) for TD-LTE and 5G NR. Also available for DECT cordless in regions where unlicensed. Lower portion (1880-1899 MHz) typically used for DECT cordless phones in Europe/Asia. |
| Propagation Notes | short range (50m indoor); TDD: similar to FDD cellular propagation |
⚙️ Technical Rules
| Field | Value |
|---|---|
| Lower Band Frequency Limit | 1900 |
| Upper Band Frequency Limit | 1920 |
| EIRP Indoor Limits | 250 mW (24 dBm) EIRP; TDD cellular: BS/UE varies by deployment |
| EIRP Outdoor Limits | typically indoor use only; TDD cellular: 23-43 dBm depending on device type |
| PSD Limit | Not applicable – receive-only band |
| Emission Mask Class | receive-only band (no transmitters) |
| Guardband Minimum [kHz] | N/A – receive-only band |
| Typical Bandwidths | 12.5 kHz–5 MHz (system‑dependent) |
| Autocalculated Bandlimits | 0 |
| Typical Bandwidths (Estimated) | 12.5 kHz–5 MHz (system‑dependent) |
| Max EIRP [dBm] | 24 dBm (250 mW); TDD: BS 33-43 dBm, UE 23-24 dBm |
| Power Source Or Duty Profile (Typical) | battery (handset), AC (base); TDD: similar to FDD |
| Channelization Plan | 3GPP channel raster per national IMT band plan (FDD); paired with 1930–1995 MHz downlink where allocated |
| Channelization | 1.728 MHz channels (10 carriers); TD-LTE: 5-20 MHz TDD; 5G NR TDD: flexible |
| Guard Band Requirement | none (unlicensed); TDD: guard time between UL/DL slots |
| OOB Emission Limit [dBm/MHz] | Strict OOBE < –60 dBm/MHz to protect adjacent channels |
| Spurious Emission Limit (dBm) | ≤ −60 dBm/MHz (strict protection standard) |
| RX Blocking Min [dBm] | per ETSI specs; TDD: similar to FDD 3GPP blocking |
| Duplexing | TDD (both directions) / Unlicensed (DECT) |
| Duplexing Information | Downlink (space‑to‑Earth) |
| Uplink Pairing | Unpaired (TDD or unlicensed); time-division duplexing |
| Downlink Pairing | |
| Paired Band Info | Paired downlink typically 1930–1995 MHz (PCS/Band 2/25), region-dependent |
| Max EIRP [dBm] | N/A – receive-only band |
| Channelization Block Size | Operator carriers (kHz–MHz) |
| 3GPP Band Number | |
| Example 3GPP Bands | Band 39 (TD-LTE 1880-1920 TDD); Band 40 in some interpretations |
| LTE Uplink Bands | Band 39 TDD (1880-1920 MHz in China); N/A for |
| LTE Downlink Bands | Band 39 TDD (1880-1920 MHz in China); N/A for |
| NR Uplink Bands | n39 TDD (in some regions); N/A for |
| NR Downlink Bands | n39 TDD (in some regions); N/A for |
| Guard Bands | Band-edge emission masks and adjacent-block coordination apply (region-specific) |
| Protocol Or Standard | ETSI EN 300 175 (); 3GPP TD-LTE Band 39 (China) |
🌎 Country Overrides
| Field | Value |
|---|---|
| Tax Service Category | Mobile (IMT) / TDD |
| Tax License Type | Licensed IMT spectrum (TDD, Band 39), region-specific allocations |
| Tax Regions | Used in selected regions/countries for IMT TDD; deployments often localized (small cells/campus) and operator-specific |
| ITU Region 1 (Europe, Africa, Middle East (west of Persian Gulf), Western Russia & Mongolia) | Mobile / Fixed |
| ITU Region 2 (North America, South America, Central America, Caribbean, Greenland, Eastern Pacific Islands (Americas region)) | Mobile / Fixed |
| ITU Region 3 (Asia, Australia, Pacific Islands, Oceania, Indian Subcontinent, East Asia & Southeast Asia) | Mobile / Fixed |
| License Type | Licensed / auctioned (region‑specific) |
| Primary Application | DECT cordless phones (Europe); TD-LTE/5G NR TDD Band 39 (China, select regions) |
| Primary Services | telephony (); TDD mobile broadband (Band 39 in China) |
| Spurious Emission [dBm] | ≤ −60 dBm/MHz (strict protection standard) |
| Lower Neighbor Use | DECT cordless (1880-1899 MHz); below that: Band 3 DL (1805-1880) Europe/Asia or Band 2 UL (1850-1880) Americas |
| Upper Neighbor Use | AWS Downlink (2110–2180 MHz) |
| Licensing Model | Unlicensed/license-exempt; TDD Band 39: Licensed (China primarily) |
| Typical Services Devices | handsets and bases; TD-LTE smartphones, IoT modules (China) |
| US FCC Alloc | Unlicensed PCS / Fixed (Part 15); varies by region for TDD cellular– |
| CA IC Alloc | MOBILE (primary); unlicensed devices (Part 15) for– |
| UK Ofcom Alloc | license-exempt; MOBILE in some regions– |
| US Ref | ETSI EN 300 175 (); 3GPP TS 36.101 (Band 39); FCC Part 15 (unlicensed) |
| Typical Bandwidths | 12.5 kHz–5 MHz (system‑dependent) |
| Market Licensing Model | Unlicensed (Part 15 in US, ETSI in Europe); TDD: Licensed in China |
| Market Common Devices | phones, baby monitors; TD-LTE smartphones, base stations (China) |
| Fresnel Radius (1st, 1 km) [m] | 6.272 |
| Typical Bandwidths (Estimated) | 12.5 kHz–5 MHz (system‑dependent) |
| Auction Status | N/A (unlicensed); Band 39: Licensed in China |
| Refarming Use | stable unlicensed use; TDD: TD-SCDMA being refarmed to TD-LTE/5G |
| Typical Site Spacing km | N/A – space segment with global footprint. / N/A – space segment with global footprint. |
| Device Ecosystem Size | Large (100M+ devices); Band 39: Large in China |
| Traffic Load Share | Low (voice only); Band 39: High in China |
| Device Hotspots (MHz) | 1897 (center); Band 39: 1900 (center) |
| Device Category | phones, base stations; TD-LTE UE and eNodeB (TDD) |
| Typical Use Cases | phones (); TDD mobile broadband, IoT (TD-LTE Band 39); private networks |
| Typical Center Frequencies [MHz] | 1897; Band 39: 1900 |
| Rule Part (Fcc Or Region) | FCC Part 15 (unlicensed ); ETSI EN 300 175; China MIIT for Band 39 |
| Modulation (Device) | GFSK; TD-LTE: OFDMA (TDD); 5G NR: OFDM (TDD) |
| Channel Width (Device) [kHz] | 1728 kHz; TD-LTE: 5000-20000 kHz; NR: flexible |
| Device Region Profiles | Europe, Asia; Band 39: China primarily |
| Per-Region EIRP Or Duty (Device) | 24 dBm (250 mW); TDD: BS 33-43 dBm, UE 23-24 dBm |
| Allocation Relevance (Device) | High in Europe; Band 39: High in China |
| Adjacent-Band Collision Risks (Device) | co-channel interference management; TDD: guard time critical |
| Example Devices Or Skus | Panasonic, Gigaset phones; Band 39: Huawei, Xiaomi (China) |
| Antenna Form Factor (Typical) | whip/stub antenna; TDD: similar to FDD cellular |
| Power Source Or Duty Profile (Typical) | battery (handset), AC (base); TDD: similar to FDD |
🛡️ Regulatory & Neighbors
| Field | Value |
|---|---|
| Lower Band Frequency Limit | 1900 |
| Upper Band Frequency Limit | 1920 |
| Rx Blocking Min dBm | per ETSI specs; TDD: similar to FDD 3GPP blocking |
| Lower Neighbor Use | DECT cordless (1880-1899 MHz); below that: Band 3 DL (1805-1880) Europe/Asia or Band 2 UL (1850-1880) Americas |
| Upper Neighbor Use | AWS Downlink (2110–2180 MHz) |
| Lower Neighbor Band | Mobile Downlink (Band 3) |
| Lower Neighbor Range | 1880-1899 MHz (DECT lower portion) |
| Upper Neighbor Label | AWS / Band 66 Downlink |
| Upper Neighbor Range | 2110–2180 MHz |
| Adjacent-Band Collision Risks (Device) | co-channel interference management; TDD: guard time critical |
| Real-World Range (Indoor/Outdoor) | 50m indoor, 300m outdoor; TDD: similar to FDD cellular |
| US FCC Alloc | Unlicensed PCS / Fixed (Part 15); varies by region for TDD cellularUnlicensed PCS / Fixed (Part 15); varies by region for TDD cellular |
| CA IC Alloc | MOBILE (primary); unlicensed devices (Part 15) forMOBILE (primary); unlicensed devices (Part 15) for |
| UK Ofcom Alloc | license-exempt; MOBILE in some regionslicense-exempt; MOBILE in some regions |
| Regulatory References | US: ETSI EN 300 175 (); 3GPP TS 36.101 (Band 39); FCC Part 15 (unlicensed); CA: ETSI EN 300 175 (); 3GPP TS 36.101 (Band 39) for TDD; UK: Ofcom IR 2000; ETSI EN 300 175 () |
| Global Harmonization | Europe/Asia; Band 39: China-specific (not harmonized globally) |
| Crossborder Coordination | minimal (unlicensed); TDD: important for Band 39 in border regions |
| Sharing Mechanism | unlicensed sharing (Part 15/ETSI); TDD: licensed exclusive (China) |
| Auction Status | N/A (unlicensed); Band 39: Licensed in China |
| Guard Or Pair | Unpaired (TDD / unlicensed) |
📈 Market & Measurements
| Field | Value |
|---|---|
| Noise Floor | Thermal noise floor ~-174 dBm/Hz + device noise figure |
| Interference Cases | unlicensed coexistence; TDD: guard time coordination, cross-border interference |
| Lower Neighbor Range | 1880-1899 MHz (DECT lower portion) |
| Upper Neighbor Range | 2110–2180 MHz |
| Interference Notes | listen-before-talk coordination; TDD: guard time synchronization critical |
| Market Licensing Model | Unlicensed (Part 15 in US, ETSI in Europe); TDD: Licensed in China |
| Market Commercial Value | High in Europe ( phones); TDD: High in China (Band 39 deployment) |
| Market Common Devices | phones, baby monitors; TD-LTE smartphones, base stations (China) |
| Market Deployment Density | High (consumer phones); TDD: High in China (Band 39 deployment) |
| Noise Floor (Estimated) | Thermal noise floor ~-174 dBm/Hz + device noise figure |
| Market Commercial Value (Estimated) | High in Europe ( phones); TDD: High in China (Band 39 deployment) |
| Ecosystem Maturity | Mature (1990s+); Band 39: Mature in China |
| Indoor Penetration | designed for indoor use; TDD: good at 1.9 GHz |
| Known Interference | co-channel interference from multiple devices; TDD: timing misalignment |
| Device Ecosystem Size | Large (100M+ devices); Band 39: Large in China |
| Real-World Range (Indoor/Outdoor) | 50m indoor, 300m outdoor; TDD: similar to FDD cellular |
| Antenna Form Factor (Typical) | whip/stub antenna; TDD: similar to FDD cellular |
| Ecosystem Maturity | Mature (1990s+); Band 39: Mature in China |
| Device Ecosystem Size | Large (100M+ devices); Band 39: Large in China |
| Chipset Availability | Specialized chipsets; Band 39: Chinese market chipsets |
| Operator Deployments | N/A (unlicensed); Band 39: Major Chinese operators (China Mobile, China Unicom) |
| Technology Generations Deployed | (); 3G (TD-SCDMA legacy), 4G (TD-LTE Band 39), 5G (NR n39 limited) |
| Roaming Support | N/A (); Band 39: Limited (China-specific) |
| Traffic Load Share | Low (voice only); Band 39: High in China |
| Indoor Penetration | designed for indoor use; TDD: good at 1.9 GHz |
| Known Interference | co-channel interference from multiple devices; TDD: timing misalignment |
| Occupancy | High (consumer ); TDD: High in China deployment regions |
| Occupancy Bucket Pct | High in residential areas; TDD: High in China markets |
| Latency Profile | 10-20 ms (voice optimized); TDD: similar to FDD cellular |
| Common Channels Or Profiles | 1.728 MHz (10 carriers); TD-LTE: 5-20 MHz TDD |
| Security Features | Standard Cipher (DSC); TDD: 3GPP security |
| Lbt Or Fhss Requirement | LBT (listen-before-talk); TDD: N/A (licensed) |
| Popularity (Installed Base) | Large (100M+ devices); Band 39: Large in China |
| Coexistence Tips | LBT coordination; TDD: synchronize guard times across operators |
| Latency Class | 10-20 ms (voice); TDD: 10-20 ms (LTE), <10 ms (5G NR) |
| Device Hotspots (Scoped && Tagged) | 1897 MHz region; Band 39: 1900 MHz region |