ALIENTECH DUO 3 Signal Booster 2.4G/5.2G/5.8G Range Extender for DJI Mavic 3 Pro, Mini 4 Pro, Air 3, Autel, Parrot FPV
ALIENTECH DUO 3 Signal Booster 2.4G/5.2G/5.8G Range Extender for DJI Mavic 3 Pro, Mini 4 Pro, Air 3, Autel, Parrot FPV
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Overview
The ALIENTECH DUO 3 is a tri‑band Signal Booster and antenna range extender designed for UAV control and video links. It operates on 2.4G, 5.2G, and 5.8G bands to enhance command and telemetry for DJI (e.g., Mavic 3 Pro/Mini 4 Pro/Air 3), Autel, Parrot and FPV drones. The device supports IEEE 802.11 a/b/g/n/ac, spread spectrum, multi‑carrier modulation, time‑division duplexing, and digital video transmission (including OcuSync/Lightbridge), with automatic frequency switching and channel selection to help reduce interference.
Manufacturer data indicates the DUO 3 increases effective range by over two times versus DUO II and is equivalent to approximately 5–10× over stock antennas. A new chipset targets higher data throughput (stated as up to 4× faster than DUO II). MU‑MIMO with dual transmit/receive improves signal robustness. The aluminum‑alloy frame aids durability and heat dissipation, and the built‑in 3.7V, 3000 mAh battery supports extended operation. The unit is described as FCC and CE compliant.
Key Features
- Tri‑band operation: 2.4G / 5.2G / 5.8G (2400–2485 MHz, 5.150–5.850 MHz)
- High‑gain panel antenna: 2.4G >13 dBi ±1; 5G >15 dBi ±1
- MU‑MIMO dual TX/RX; automatic frequency and channel selection; multi‑channel support
- External coax support with lockable QMA female/male connectors; up to 35 m cable length in 5.8G mode
- All‑aluminum alloy structure for strength and thermal performance
- Built‑in battery: 3.7V, 3000 mAh
- Compliance: IEEE 802.11 a/b/g/n/ac; FCC/CE (per manufacturer)
Specifications
| Brand Name | STARTRC |
| Model Number | ALIENTECH DUO 3 |
| Device Model | DUO‑2458DSB |
| Product Type | Signal Booster |
| Standards | IEEE 802.11 a/b/g/n/ac |
| Working Frequency Band | 2400–2485 MHz; 5.150–5.850 MHz |
| Tri‑Band | 2.4G / 5.2G / 5.8G |
| Working Voltage | 6–9V |
| Battery | 3.7V, 3000 mAh |
| Antenna Gain | 2.4G >13 dBi ±1; 5G >15 dBi ±1 |
| 2.4G Receive Gain | 12 dB ±1 |
| 5.2G/5.8G Receive Gain | 15 dB ±1 |
| Transmit Gain | 15 dB ±1 |
| Input Power Range | 10–25 dBm |
| EVM | 3% @ 28 dBM, 802.11ac, 6.93 Gbps MIMO OFDM 64QAM, BW 80 MHz |
| Electric Current | 435 mA at POUT 28 dBm 9V |
| Noise Coefficient | ≤ 2.5 dB |
| Transmission Delay | ≤ 1 μs |
| Operating Temperature | −20°C ~ 80°C |
| Antenna Horizontal Half‑Power Beamwidth | 65–84° |
| Antenna Vertical Half‑Power Beamwidth | 63–75° |
| External Coax Length (5.8G) | Up to 35 m |
| Connectors | QMA female / male; lockable |
| Cable Types | RG223 / CG240 / RG8; 50 ohm |
| Certification | CE (manufacturer also states FCC/CE compliance) |
| Compatible Drone Brand | DJI; also stated compatible with Autel, Parrot, and FPV drones |
| Origin | Mainland China |
| Package | Yes |
Antenna Gain and Angle
- Horizontal half‑radiation angle: 65–84°
- Vertical half‑radiation angle: 63–75°
External Coaxial Cable
Flexible 50‑ohm RG223/CG240/RG8 coaxial cables are supported. Connectors are QMA female/male and lockable.
Construction
| RG223 | CG240 | RG8 | |
| ① Inner Conductor | Silvered Copper Wire, O.D 0.90 mm | Bare Copper, O.D 1.42 mm | Copper Clad Aluminum, O.D 2.74 mm |
| ② Dielectric | Polyethylene, O.D 2.95 mm | Foam PE, O.D 3.81 mm | Foam PE, O.D 7.24 mm |
| ③ Outer Conductor | Double Silvered Copper Braid, O.D 3.95 mm | Aluminum foil + tinned copper wire braid, Nom. O.D 4.52 mm | Self‑adhesive Aluminum Foil + Tinned Copper Wire, O.D 8.00 mm |
| ④ Jacket | Black PVC, O.D 5.30 mm | Black PE, O.D 6.10 mm | Black PE, O.D 10.16 mm |
Electrical Specifications
| RG223 | CG240 | RG8 | |
| Cable Impedance | 50 ohm | 50 ohm | 50 ohm |
| Capacitance | 101.05 pF/m | 79.4 pF/m | 78 pF/m |
| Velocity | 66% | 84% | 85% |
| Jacket Spark Test | 5000 Vrms | 5000 Vrms | 8000 Vrms |
| Peak voltage (KW) | 1.4 W | 5.6 W | 16 W |
| Operating Frequency | 12 GHz Max | 18 GHz Max | 21 GHz |
Mechanical & Environmental
| RG223 | CG240 | RG8 | |
| Weight | 60 g/m | 62 g/m | 80 g/m |
| Bend Radius | 25 mm | 30 mm | 51 mm |
| Temperature Range | −25~+70°C | −40~+80°C | −40~+80°C |
| RoHS Compliance | Compliant | Compliant | Compliant |
Attenuation (Typical @ 25°C, Sea Level)
| Frequency (MHz) | RG223 (dB/m) | CG240 (dB/m) | RG8 (dB/m) |
| 100 | 0.13 | — | — |
| 400 | 0.27 | — | 0.10 |
| 450 | — | 0.173 | — |
| 900 | — | 0.248 | — |
| 1000 | 0.44 | — | 0.16 |
| 2500 | — | 0.424 | — |
| 3000 | 0.82 | — | 0.28 |
| 5000 | 1.10 | — | 0.38 |
| 5800 | — | 0.668 | — |
| 6000 | 1.27 | — | 0.42 |
Applications
- UAV remote control range extension
- Wi‑Fi communication links and long‑range data transmission
- Digital video transmission systems using OcuSync and Lightbridge
Details
AlienTech DUO 3 Signal Booster supports 2.4G/5.2G/5.8G frequencies, featuring dual antennas and a rugged design for enhanced signal performance.
Radiation patterns for a 2450MHz signal booster are shown with a 3D gain plot on the left, color-coded from -40.2dB (blue) to 13.3dB (red), indicating directional strength. To the right, polar plots at Phi=0° and Phi=90° display gain distribution in dB. Maximum gain reaches 10–13dB, with reduced levels elsewhere. Both plots depict S_2450: LastAdaptive at 2.45GHz, illustrating performance across angles. The visualization highlights directional efficiency and coverage characteristics of the booster at the specified frequency, providing insight into its radiation behavior in three-dimensional space and principal planes.
Antenna radiation pattern at 5850MHz shows 3D gain and 2D polar plots with directional performance, achieving max gain of 18.2 dB and min of -37.6 dB.
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