PMI Model No. P6T-2G18G-55-R-512-SFF is a high speed, single pole, six throw, reflective switch capable of switching within 15 ns.  The frequency range is 2.0 to 18.0 GHz and has over 55 dB of isolation. 

This model was designed to produce very low video transients of 15 mV peak to peak and a video transient spectral content of -65 dBm maximum. 

Features include TTL control, SMA female connectors, small package size 1.0" x 1.4" x 0.3".

http://www.pmi-rf.com/Products/Switches/P6T-2G18G-55-R-512-SFF.htm