Patent ID: 6844748

Claim:
A jig for inspecting a device provided with at least a radio frequency signal terminal and an earth terminal, the jig comprising: a metal block, formed with a through hole extending in a first direction; and a contact probe, inserted into the through hole, the contact probe comprising: a metal pipe, extending in the first direction; a plunger, retractably projected from one longitudinal end of the metal pipe to be brought into contact with the radio frequency signal terminal; and at least two dielectric ring members, provided on an outer periphery of the metal pipe, and fitted with the through hole while forming a gap between the outer periphery of the metal pipe and an inner wall of the through hole, in order to form a coaxial path in which the contact probe serves as a core conductor and the metal block serves as an external conductor, wherein a diameter of the through hole and a diameter of the dielectric ring members are selected such that the coaxial path has a predetermined impedance relative to the radio signal frequency terminal.