Capacitance is the property which permits electrical energy to be stored in a dielectric between two
conductors that are at different potentials. Similar to impedance, capacitance is dependent upon the inner and outer conductor dimensional ratio and the dielectric constant, but in a reciprocal way. For example, in cables with the same dielectric constant, if capacitance decreases then impedance increases. The capacitance of a cable is expressed in picofarads (10¹² farad) per foot, and can be calculated with the following formula:

Engineering Home | Back | Next