Coaxial probe short-circuit mechanism and operation method thereof

Abstract

The invention discloses a coaxial probe short-circuit mechanism and an operation method thereof. The coaxial probe short-circuit mechanism structurally comprises a coaxial probe, a short-circuit plate, a base, a cover board and a cushion block, wherein the short-circuit plate is made of a flexible conductive material, and is fixedly arranged on the cushion block; a probe limiting hole through which the coaxial probe passes is formed in the base; and a limiting sliding block for locking the coaxial probe is also arranged on the base. The limiting sliding block is pressed to slip downwards in an operation; an open end of the coaxial probe simultaneously passes through the probe limiting hole and a through hole in the limiting sliding block; the short-circuit plate is pressed by the open end of the coaxial probe; the limiting sliding block is loosened; a sliding block spring rebounds; and the limiting sliding block slips upwards, so that locking and limiting of the coaxial probe are achieved. According to the coaxial probe short-circuit mechanism, a good contact can be formed by the open end of the coaxial probe and the short-circuit plate; the service lifetime of the short-circuit plate is prolonged; the clamping operation is convenient, fast and reliable; and the consistency of multiple calibrations is good.

Description

technical field [0001] The invention relates to a coaxial probe short-circuit mechanism and an operation method thereof, which are applied to the short-circuit calibration of the coaxial probe. Background technique [0002] Coaxial probes need short-circuit calibration before measuring the complex permittivity of microwave / RF dielectric materials. The structure of the coaxial probe is as shown in the accompanying drawings Figure 5 As shown, one end is provided with an adapter 12-5, and the other end is an open end 12-1. During short-circuit calibration, a short circuit is added to the open end 12-1 of the coaxial probe to achieve sealing. It is required that the open end of the coaxial probe Sections of the inner conductor 12-3, outer conductor 12-2 and dielectric material 12-4 of 12-1 must be in good contact with the short circuit, so as to prevent electromagnetic waves from leaking out and causing errors in measurement and calculation. [0003] The currently used coaxial...

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Problems solved by technology

[0004] 1. The short circuit is made of hard metal materials with high flatness, such as gold-plated brass surface, and the cost is relatively high

[0005] 2. In order to achieve complete sealing, the open end of the short circuit and the coaxial probe must have high flatness and roughness, and machining tolerances and surface wear during use will inevitably lead to a slight air gap between the two, resulting in Measurement and Calculation Errors

[0006] 3. The above operation method is difficult to ensure the consistency of the pre-tightening force during multiple calibrations. Excessive pre-tightening force will also cause damage to the coaxial probe and the short circuit board. gap

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