A Proposal for a High-Voltage Transmission Line Directional Coupler

Directional couplers are devices generally used in high-frequency transmission lines and waveguides that respond to forward and reverse traveling waves separately. Hence they can be used to either measure standing-wave ratio in the steady state or to determine the direction of a propagating transient wave. Here, a design is proposed for a directional coupler to be used on multimode high-voltage transmission lines. Its performance is analyzed and several suggestions are made to improve its design.