RTL-SDR ADS-B Filter / LNA Preamplifier

RTL-SDR Blog ADS-B Triple Filtered LNA (Bias Tee Powered) with an SMA male / SMA male feedthrough.

A high-performance low-noise amplifier (LNA) for improving 1090 MHz ADS-B reception. The LNA uses a low-noise MGA-13116 two-stage amplifier circuit and three stages of filtering, so that strong signals or interference do not overload either the amplifier or the SDR dongle.

The LNA can help improve ADS-B reception by lowering the noise level and helping to reduce losses in the coaxial cable and/or in other elements such as switches and connectors in the RF path. To get the best performance from the LNA, it must be placed as close to the antenna as possible.

The antenna should be connected to the SMA IN socket.
The LNA requires a 3.3 - 5V BIAS power supply (through the coaxial cable connected to the SMA OUT +5V socket).
The RTL-SDR V3 available in our shop has a suitable BIAS power supply, which can be activated via software.

Key features:

• 27 dB gain
• noise figure: approx. 1 dB
• out-of-band attenuation: approx. 60 dB
• designed to be installed as close to the antenna as possible and used with the RTL-SDR V3
• triple filtering with a low-loss high-pass filter and two 1090 MHz SAW filters
• allows the RTL-SDR V3 receiver to work in heavily congested environments
• requires a 3-5V power supply. Works with the RTL-SDR V3, which provides a suitable 4.5 V supply.
• current draw: 150 mA
• dimensions: 46.5 x 32 x 15.6 mm (without SMA sockets), with sockets: 69.8 mm

The set includes:

• 1 pc. ADSB RTL-SDR Blog ADS-B Triple Filtered LNA
• SMA male / SMA male adapter