High-frequency active probe having replaceable contact needles

Details High-frequency active probe having replaceable contact needles High-frequency active probe having replaceable contact needles

1991-03-04

1991-09-03

Karlsen, Ernest F.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

With rotor

324 725, G01R 106, G01R 3102

Patent

active

050457810

ABSTRACT:
A high-frequency probe comprising a semirigid coaxial line which terminates in an active circuit assembly. The coaxial line's outer conductor is connected to a box while its inner conductor is connected to an active circuit chip. A signal contact needle is attached to the active circuit chip and extends linearly with the coaxial line. The signal needle is held in place with a mass of epoxy filled with silica microballoons, providing a low-capacitance mount. A ground contact needle is connected to a wiper which contacts the box, thus providing a direct, and short, path between the coaxial line's outer conductor and the ground contact needle.

REFERENCES:
patent: 3849728 (1974-11-01), Evans

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