Quantic PMI Model P3T-250M40G-60-T-55-292FF is a high speed, single pole, three throw, absorptive switch capable of switching within 50 ns. The frequency range is 0.25 to 40 GHz and has over 60 dB of isolation. Housing size is 1.0" x 1.0" x 0.5" with 2.92mm female connectors.  COTS Availability!  https://www.quanticpmi.com/product-details/p3t-250m40g-60-t-55-292ff