RTL-SDR FM Bandstop Filter

RTL-SDR FM Bandstop Filter

The RTL-SDR FM Bandstop Filter is a high-performance receive-only filter designed to suppress strong broadcast FM signals between 88 MHz and 108 MHz. By reducing overload and intermodulation caused by nearby FM broadcast stations, the filter helps improve receiver performance on adjacent and distant frequencies, making it an ideal accessory for SDR receivers, scanners, spectrum analyzers, and wideband monitoring systems.

Key Features

• Broadcast FM band-stop filter for SDR and receiver applications
• Blocks FM broadcast signals from 88 MHz to 108 MHz
• Over 50 dB attenuation within the FM broadcast band
• Helps prevent receiver overload from strong local FM stations
• Improves weak-signal reception outside the FM broadcast band
• Reduces intermodulation products and image signals
• Ideal for RTL-SDR, Airspy, SDRplay, HackRF, and scanner receivers
• Low insertion loss outside the rejected frequency range
• Less than 0.5 dB insertion loss from DC to 1 GHz
• Typically less than 1.5 dB insertion loss from 1 GHz to 3 GHz
• 7th-order Chebyshev filter design
• High rejection performance in urban RF environments
• Improves ADS-B, airband, VHF, UHF, and scanner reception where FM overload exists
• Compact metal enclosure for RF shielding
• SMA female connectors on both ports
• Simple inline installation between antenna and receiver
• No external power required
• Passive filter design for reliable long-term operation
• Compatible with active antennas and LNAs when properly installed
• Suitable for fixed, portable, and laboratory monitoring stations
• Excellent accessory for spectrum monitoring and RF experimentation
• Durable aluminum enclosure construction
• Receive-only design for SDR and monitoring equipment
• Plug-and-play operation with no configuration required
• Designed specifically to address broadcast FM interference issues

Typical Uses

• Software Defined Radio (SDR) reception
• ADS-B aircraft monitoring
• Airband reception
• VHF and UHF signal monitoring
• Scanner receiver installations
• Weak-signal reception improvement
• Spectrum analysis and RF testing

In the Box

• RTL-SDR FM Bandstop Filter
• SMA Male-to-Male Adapter