Broadband adaptive adjustment device and method for coupling amount of resonant cavity

Abstract

The invention relates to a broadband adaptive adjustment device and method for the coupling amount of a resonant cavity. According to the invention, a first coupling device used for receiving the coupling amount of the resonant cavity and at least two second coupling devices used for resonant excitation are inserted into different positions of the resonant cavity, a network analyzer receives the coupling amount of the resonant cavity transmitted by the first coupling device and transmits the coupling amount to an upper computer, and the upper computer generates a control signal to control thedisplacement and the angle of the first coupling device and the second coupling devices through a data acquisition device, so that the coupling amount under a resonant working mode is adaptively adjusted; the upper computer is further used for generating a control signal of a microwave switch and controlling the microwave signal to be transmitted to one of the second coupling devices through the microwave switch, so that the switching of different resonant working modes is realized, the adaptive adjustment of the coupling amount of multiple resonant working modes of the single resonant cavityunder broadband is realized, the interference parasitic modes are reduced, the design cost is effectively reduced, the cavity design efficiency is improved, and the test precision of dielectric parameters of materials under broadband is improved.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic parameter testing of microwave and millimeter wave materials, and relates to a wide-frequency self-adaptive adjustment device and method for the coupling amount of a resonant cavity. Background technique [0002] The complex dielectric constant of materials is one of the intrinsic parameters to characterize the electrical properties of materials, and its accurate measurement is the key link in material design and application. At present, there are many different testing methods for complex permittivity, among which the resonant cavity testing method is one of the commonly used testing methods, which has the advantage of high testing accuracy. In the design of resonant cavity, coaxial coupling ring and coupling probe are two commonly used electromagnetic coupling devices, which are used to realize the excitation of resonance. The coupling amount affects the quality factor of the resonant ca...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the shortcomings of the above-mentioned traditional resonant cavity that cannot adaptively adjust the coupling amount in a wide frequency band after it is designed and installed and cannot work in a resonant working mode that includes a resonant cavity, the present invention proposes a device and method for wide-band adaptive adjustment of the coupling amount of a resonant cavity , introduce a microwave switch to switch the resonant working mode of the resonant cavity, adjust the depth and angle of the coupling device inserted into the resonant cavity according to the current coupling amount of the resonant cavity, realize the adaptive adjustment of the coupling amount of the resonant cavity in a wide frequency band, and meet the requirements of the resonant cavity in a wide frequency range Requirements for weak coupling of different resonant working modes, improve the test accuracy of complex dielectric constant of materials under wide frequency, and save design cost

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