Patent ID: 8248740

Claim:
A high-speed current shunt, comprising: a) a flat conductive metal strap having a first and a second electrode at each end of said strap for connection to an external circuit for receiving current through the strap; said strap having a defined current-measuring region extending from a first linear position to a second linear position along the length of the strap; and b) a tapered parallel-plate transmission-line impedance-matching transformer, comprising: i) first and second plates tapered in shape and having a wide end and a narrow end, relative to one another; each tapered plate having a length approximately 10 times that of width of said metal strap; ii) said first plate being attached at its wide end to said first linear position of the defined measuring region by a solder and said second plate being attached at its wide end to said second linear position of the defined measuring region by a solder; and iii) a coaxial cable with a center conductor being attached by a solder to the narrow end of the first plate, and a shield being attached by a solder to the narrow end of the second plate.