Quantic PMI Model LM-1G18G-15-10W-500WP-SFF is a high power limiter that operates over the 1 to 18 GHz frequency range that can handle an input power of 10 W CW and 500 W Max (@ 0.1% Duty Cycle, 1 µs Pulse Width) with an RF leakage of +17 dBm Typ, insertion loss of 2.5 dB and a VSWR of 2.0: 1.  Compact housing measuring 1.0" x 1.0" x 0.4" with field replaceable SMA female connectors. https://www.quanticpmi.com/product-details/lm-1g18g-15-10w-500wp-sff