A test device for a resonant cavity

By designing a resonant cavity testing device adaptable to different sizes and frequency bands, and using a vector network analyzer to calculate the equivalent series resistance of the capacitor, the accuracy and adaptability problems of capacitor testing in the prior art have been solved, and accurate testing of high-Q capacitors has been achieved.

CN224328185UActive Publication Date: 2026-06-05DALIAN DALICAP TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
DALIAN DALICAP TECH CO LTD
Filing Date
2025-04-16
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

Existing impedance analyzers and Boonton 34A resonant cavities cannot accurately measure the equivalent series resistance of high-Q capacitors and cannot accommodate capacitors of different sizes and frequency bands, making it difficult to test MRI equipment in magnetic resonance applications.

Method used

A resonant cavity testing device was designed, including an outer conductor, an inner conductor, and a clamp plunger. By acquiring the resonant cavity parameters under different conditions, the equivalent series resistance value of the capacitor is calculated using a vector network analyzer, which can adapt to capacitor testing of different sizes and frequency bands.

Benefits of technology

It enables accurate ESR testing of capacitors of different sizes and frequency bands, simplifies the calculation process, reduces testing errors, and improves the testing accuracy of MRI equipment.

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Abstract

The embodiment of the present application provides a kind of resonant cavity testing device, the resonant cavity testing device includes: resonant cavity testing device includes: outer conductor, inner conductor and clamp plunger, the outer conductor and the inner conductor are insulated, the inner conductor and clamp plunger are installed in the inside of the outer conductor, the inner conductor and the clamp plunger correspond, and the capacitor to be measured is installed between the inner conductor and the plunger;The outer conductor is provided with connecting port, the connecting port is connected with vector network analyzer respectively, the resonant cavity testing device provided by the embodiment of the present application can be adapted to different size capacitors, and the capacitor of different application frequency band can be controlled.
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