a capacitor

Abstract

The invention relates to the field of capacitors, in particular to a novel capacitor. A flat plate structure, instead of a traditional capacitor coaxial structure, is adopted for the novel capacitor, outputting is achieved in a three-end mode through SMA contacts or BNC contacts, the influences of distribution parameters are eliminated, and the technical index of a standard capacitor is improved. By adjusting the distance between a first electrode plate and a second electrode plate, the magnitude of capacitance is adjusted; meanwhile, an electrode shielding plate is arranged, a through hole is formed in the center of the electrode shielding plate, the effective area between electrodes is adjusted through the area of the through hole, and the adjustable precision and flexibility of the capacitor are improved; in addition, the capacitor is filled with inertia gas serving as a medium, and higher stability is achieved compared with a traditional medium; moreover, ferronickel is adopted as material for the electrodes and a fixed support, and therefore the novel capacitor has the advantages of being small in thermal expansion coefficient, high in stability and the like; the novel capacitor is high in precision, stable in performance and particularly suitable for being used as a high-precision standard capacitor.

Description

technical field [0001] The invention relates to the field of metering, calibration and electronic components, in particular to the field of capacitors. Background technique [0002] In the field of measurement or calibration, a standard capacitor is a special capacitance tool to ensure the consistency of the unit value of the capacitor parameter. In the field of component sensors, standard capacitors are also used for accurate sensing of fuel tanks on aircraft and rockets. The technical product invented this time is: high-accuracy (small capacitance) standard capacitor with a capacity range of 0.001pF to 10pF, which can be used for the measurement and calibration of small-capacity capacitor parameters in the measurement of AC parameters. It can also be used as a capacitive parameter sensor. [0003] The standard capacitors produced by existing standard capacitor manufacturers range from 1pF to 10mF, and the allowable error limit is ±0.02% to 0.5%. Among them, in the range ...

AI Technical Summary

Problems solved by technology

From the perspective of future development and demand, the existing 1pF ~ 10pF capacitors can no longer meet the needs of technological development with an index of ±0.02% ~ 0.05%. The development of technology requires higher technical indicators and more precise capacitors, which can achieve accuracy in ±0.005%~0.01% of the standard capacitor; in terms of capacity range, the current minimum capacitance can only reach 1pF, which cannot meet the requirements of measurement transmission, calibration and sensing of capacitor parameters. In order to meet the requirements of development, it is necessary to design a capacitor Standard capacitors with smaller capacity, such as: 0.1pF, 0.01pF, 0.001pF standard capacitors

Images