The AE18000SSH6615 from Anatech Electronics is a Suspended Stripline High Pass Filter with a cutoff frequency of 18 GHz and a passband from 18 to 40 GHz. The filter has an insertion loss of less than 2 dB with a rejection of more than 50 dB at 15 GHz. It can handle an input power of up to 15 W. This high pass filter is available in a module that measures 12.7 x 12.7 x 10.0 mm with SMA female connectors.