Direct Current Blocking Coupler

A coupler which is specifically designed to be inserted into a coaxial transmission line to permit flow of radio frequency electrical energy while preventing the flow of signals below 20 kilohertz (kilocycles). It consists of a short section of coaxial line which has a capacitance in series with the center and/or outer conductor. See also coupler (1), direct current shorting; coupler, directional and coupler (1), transmission line.