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Low-Pass Filter LPF 7th Order Elliptical 1-1000Mhz 3.5, 7, 14, 28, 144, 433MHz etc for RF Amlifier, Receiver, Transmitter, Mixer, Transceiver, Antenna.

Low-pass filter is a filter that passes signals with a frequency lower than a selected cutoff frequency and attenuates signals with frequencies higher than the cutoff frequency. These filters are usually applied after RF amplifiers (MMIC, Gain-block and Class C amplifiers) for suppression of high-order harmonics of radio-frequency signals, or placed at the mixer output to filter out high-frequency interference that plays a role in frequency selection.