Planar Monolithics (PMI) Model P1T-DC40G-65-T-24FM-1NS is an Absorptive, Single Pole, Single Throw Pin Diode Switch that operates from DC to 40 GHz with over 55 dB isolation. This model incorporates a TTL compatible driver for easy system integration. Housing size is 1.0" x 1.0" x 0.5" with 2.4mm female / male connectors.  https://www.pmi-rf.com/product-details/p1t-dc40g-65-t-24fm-1ns