The AE3500L9196 from Anatech Electronics is a low pass filter with a passband frequency from DC to 3500 MHz. It has an insertion loss under 0.7 dB, return loss of more than 19 dB and a VSWR under 1.25:1. It is available in a module that measures 0.75 x 0.50 x 0.40 inches with SMA female connectors.
