Notch filters are designed to knock out specific bands of radio interference. They have significantly lower loss than high pass, low pass, or band pass filters and often have higher than 20db choking capability.
In other words, if you are using 433MHz to remote control your RC vehicle and 1.2-1.3GHz to transmit and receive video. Then you might want to consider using this filter between your 433MHz transmitter and its antenna, to remove/filter undesireable harmonics that hits on 1.2-1.3GHz band.
The 433/1.3 filter is used on your UHF radio when flying on 1.2-1.3GHz video.
- Passband: 380-500MHz
- Reject band: 1220-1360MHz
- Filter strength: 26db