David Thomas Engquist

Daniel G Knierim

Josiah A Bartlett

Andrew W Rusinek

A probe tip for an isolated probe having a triaxial cable has a conductive probe tip interface at one end of the cable, a signal conductor, the signal conductor traversing a length of the cable and electrically connected to the conductive probe tip interface, a reference conductor surrounding the signal conductor along the length of the cable, a shield conductor surrounding the reference conductor at least along the length of the cable, the shield conductor and the reference conductor electrically connected at ends of the probe tip, a first insulator between the signal conductor and the reference conductor along the length of the cable, a second insulator between the reference conductor and the shield conductor along the length of the cable, and high magnetic permeability material inside the shield conductor. A method of manufacturing a tip for an isolated probe having a triaxial cable includes accessing a shield conductor of the triaxial cable, inserting a high magnetic permeability material between the shield conductor and a reference conductor in the triaxial cable, electrically connecting the shield conductor to the reference conductor. A triaxial cable has a signal conductor, the signal conductor traversing a length of the cable, a reference conductor surrounding the signal conductor along the length of the cable, a shield conductor surrounding the reference conductor along the length of the cable, the shield conductor and the reference conductor electrically connected at ends of the cable, a first insulator between the signal conductor and the reference conductor along the length of the cable, a second insulator between the reference conductor and the shield conductor along the length of the cable, and high magnetic permeability material inside the shield conductor.

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Portland, OR, United States of America

David Thomas Engquist