Flamingo FM - Broadcast FM Bandstop Filter for Software Defined Radio (SDR) Applications

A high-quality, high-performance bandstop filter designed for software defined radio (SDR) applications. Designed and manufactured by Nooelec in North America, with a full 2-year product warranty.

Broadcast FM can be particularly problematic due to the high-powered transmitters used for broadcasting in some areas. These signals can overload the front end of an SDR, causing imaging and a number of other issues.

We designed Flamingo FM to provide sufficient attenuation for broadcast FM frequencies (>40dB typical) while ensuring adjacent bands, such as the important VHF airband (108-137MHz) are minimally affected. The -3dB rolloff of the filter is 80MHz and 115MHz. Minimal out-of-band insertion loss means the filter can stay in place for most any application. As a true bandstop filter, you are able to pass-through DC (bias power) when it is required.

DC current handling is 250mA (min), and the maximum recommended signal level is +18dBm (5Vp-p), so there is no issue using the filter for higher-power applications. Typical performance characteristics can be found on the downloads tab of the product page on our website.

Flamingo FM has its filter circuitry fully shielded with an EMI frame, and has its front end protected by an ESD diode meant for RF applications.

2 mounting holes are available on the PCB for various mounting options, and the SMA hardware (washer and nut) is included.