RTL-SDR 50MHz - 4Ghz Wideband LNA

RTL-SDR 50MHz - 4GHz Wideband LNA

The RTL-SDR 50MHz - 4GHz Wideband LNA is a low-noise amplifier designed to enhance weak signal reception across a broad frequency range. Based on the high-performance SPF5189Z amplifier chipset, it provides low-noise gain from 50 MHz to 4 GHz, making it suitable for SDR receivers, ADS-B monitoring, satellite reception, GNSS applications, L-band reception, and general RF experimentation. Its bias-tee powered design allows convenient integration with compatible SDR receivers and active antenna systems.

Key Features

• Wideband low-noise amplifier covering 50 MHz to 4 GHz
• High-performance SPF5189Z amplifier architecture
• Low noise figure of less than 1 dB
• Approximately 18.7 dB gain at 900 MHz
• Designed to improve weak-signal reception performance
• Bias-tee powered operation for simplified installation
• Compatible with RTL-SDR V3 and V4 built-in bias tee functionality
• Supports SDR, scanner, satellite, GNSS, and RF monitoring applications
• Integrated ESD protection on antenna input
• Fully shielded conductive metal enclosure
• 50-ohm RF design for SDR and communications equipment
• SMA female RF connectors
• Can be mounted directly at the receiver or antenna feed point
• Suitable for ADS-B, AIS, L-band, Inmarsat, Iridium, and weather satellite reception
• Low current consumption for portable SDR setups
• Improves feedline loss compensation in remote antenna installations
• Supports fixed station and portable monitoring systems
• Alternative direct DC power option via internal jumper configuration
• Compact inline installation design
• Optimized for receive applications across VHF, UHF, and microwave bands
• Excellent accessory for SDR spectrum monitoring and experimentation
• Durable aluminum enclosure for RF shielding and mechanical protection
• Suitable for hobbyist, amateur radio, satellite, and research applications
• Plug-and-play operation with compatible bias-tee equipped receivers
• Designed for low-noise signal amplification across a broad frequency range

Typical Uses

• Software Defined Radio (SDR) reception
• ADS-B aircraft tracking systems
• Inmarsat and Iridium satellite reception
• GNSS and GPS signal monitoring
• Weather satellite reception
• VHF, UHF, and L-band monitoring
• RF experimentation and spectrum analysis

In the Box

• RTL-SDR Wideband LNA
• SMA Male-to-Male Adapter