The PE8238 from Pasternack Enterprises is a 50 Ohm DC Block that operates from 100 MHz to 50 GHz. It has an insertion loss of less than 1.5 dB and can handle an input voltage of up to 75 V. The DC block is available in a connectorized module that measures 1.12 x 2.40 inches with 2.4 mm male and female connectors.