Quantic PMI Model LM-10M18G-16-20W-AL-ROHS is a coaxial limiter with an operating range of 0.1 to 18 GHz that has a maximum insertion loss of 2 dB at -10 dBm input power with a VSWR of 2.0:1 maximum. This compact unit measures 0.90" x 0.38" SQ and is outfitted with SMA connectors. ROHS compliant.  https://www.quanticpmi.com/product-details/lm-10m18g-16-20w-al-rohs