Precise high-Q-value four-terminal-pair high-frequency inductor standard device

Abstract

A precise high-Q-value four-terminal-pair high-frequency inductor standard device comprises a metal shielding box and an upper cover plate covering the top of the metal shielding box. The metal shielding box is internally and fixedly provided with a main inductive winding and a trimming inductor arranged on an adjusting rod, and a plurality of BNC patch plugs are arranged on the upper surface of the upper cover plate and electrically connected to the two ends of the main inductive winding; the main inductive winding comprises a frame and an inductive coil wound on the frame; the frame is of a segmented groove structure or threaded groove structure; the frame is a hollow cylinder. According to the segmented groove structure of the frame, a plurality of uniformly formed wire grooves and partition boards used for separating adjacent coils are arranged in the radial direction of the hollow cylinder. The hollow cylinder is also provided with longitudinal grooves used for allowing the coils to pass. The high-Q-value four-terminal-pair high-frequency inductor standard device can meet the requirement of calibration for high precision, can be used for calibrating precise LCR testers and impedance analyzers, and has the advantages of being high in precision, convenient to operate and high in Q value.

Description

technical field [0001] The invention relates to the calibration technology of inductance, capacitance and resistance, in particular to a precision high-Q value four-terminal pair high-frequency inductance standard device. Background technique [0002] The inductance standard is a standard measuring tool used to save the value of the inductance unit Henry in the electromagnetic unit system. It is often used for measurement and calibration. At present, in order to calibrate precision LCR testers and impedance analyzers with four-terminal pair input, in addition to four-terminal pair high In addition to the high-frequency capacitance standard and the four-terminal pair high-frequency resistance standard, the four-terminal pair high-frequency inductor is also required, but limited by related technologies, only the four-terminal pair high-frequency capacitance standard and the four-terminal pair high-frequency resistance standard are used Production and use, while the existing in...

AI Technical Summary

Problems solved by technology

[0002] The inductance standard is a standard measuring tool used to save the value of the inductance unit Henry in the electromagnetic unit system. It is often used for measurement and calibration. Currently, in order to calibrate the four-terminal pair input Precision LCR testers and impedance analyzers require four-terminal pair high-frequency inductors in addition to four-terminal pair high-frequency capacitance standards and four-terminal pair high-frequency resistance standards. However, due to related technical limitations, only four-terminal pair High-frequency capacitance standards and four-terminal pair high-frequency resistance standards are being produced and used, while the existing inductance standards can only be used at low frequencies below 100kHz, which cannot meet the requirements of measurement and calibration

[0003]The currently used inductance standard is generally made according to the method of ordinary high frequency inductance, its inductance accuracy and stability at high frequency are poor, and the Q value It is also lower than 25, which cannot meet the requirements of metrology and calibration, the operation is difficult, the measurement accuracy is low, and it cannot meet the needs of metrology and calibration laboratories

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