High temperature calibration device and calibration method for microwave dielectric material testing

Abstract

The invention provides a high-temperature calibration device for microwave dielectric material testing and a calibration method thereof. The device includes: a vector network analyzer, and two sets of waveguides respectively connected to the vector network analyzer. Joints, cooling waveguides, high-reflection and straight-through conversion waveguides, heat-insulated waveguides, high-temperature waveguides, short-circuit boards, high-reflection and straight-through conversion waveguides are slotted into high-reflection inserts to form a short circuit; the calibration method includes opening the test software and opening a slot in the waveguide Control the insertion of the high-reflection insert, run the test software for automatic calibration, test the reflection coefficients S11r and S22r in the two high-temperature waveguides at room temperature, test the S11h and S22h after loading the medium sample to be tested at high temperature, and test the S11h Carry out correction; Utilize S ' 11 after microwave loss correction, calculate the complex dielectric constant of the medium sample to be tested at temperature T; This device and method can be applied in the microwave material dielectric property high-temperature test system, can further improve The test accuracy of the test system.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic parameter testing of microwave and millimeter wave materials, and in particular relates to a device for calibrating microwave materials at high temperature and a calibrating method thereof. Background technique [0002] With the development of science and technology, microwave dielectric materials are widely used in various microwave fields as electromagnetic wave transmission media, such as satellite communication, microwave communication, electronic countermeasures, radar navigation, infrared remote sensing, telemetry and other systems. At the same time, aviation, aerospace And the development of military technology is very rapid, the speed of various aircraft is getting faster and faster, and the requirements for the development of high-temperature materials are becoming more and more urgent. Therefore, mastering the parameters of microwave dielectric materials is of great importance to ...

AI Technical Summary

Problems solved by technology

Because the microwave material high temperature test system is difficult to calibrate with calibration parts, it is impossible to deduct the influence of some test parts, and it is impossible to obtain very accurate dielectric properties of materials.

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