The LM-618-10-1W-SHS-1-M from PMI is a high speed limiter that operates from 6 to 18 GHz. It can handle a peak power of up to 100 Watts with a pulse width of 1usec. This limiter has an insertion loss of less 2 dB and a VSWR of 2.0:1. It is available in a module that measures 0.5 x 0.5 x 0.22 inches with SMA male/female connectors.
