Sub-GHz Filter

Band-Pass Filter BPF 7th Order 1-1000Mhz 433MHz 868MHz 915MHz 1GHz for RF Receiver Transmitter Amplifier Mixer Transceiver Antenna

 

A Band-Pass Filter or BandPass Filter (BPF)

It is a device that passes frequencies within a certain range

And it rejects (attenuates) frequencies outside that range