Reflecting rectangular resonance cavity

Abstract

The invention discloses a reflecting rectangular resonance cavity, and particularly relates to a reflecting rectangular resonance cavity which is used for measuring the complex dielectric constant andthe complex permeability of a material and works in a TE10p mode. The resonance cavity is composed of a rectangular waveguide tube and two short circuit plates, and the rectangular waveguide tube isthe core component of the overall resonance cavity; holes are formed in the center of the rectangular waveguide tube in the horizontal direction and in the vertical direction respectively and used forplacing the measured material; the short circuit plates are placed at the two ends of the rectangular waveguide tube respectively, and therefore electromagnetic waves can generate reflection in the rectangular waveguide tube to form standing wave distribution; and a through hole is formed in the center of the short circuit plate arranged at one end of the resonance cavity, therefore, the electromagnetic waves can be coupled into the rectangular waveguide tube, the resonance cavity can work in an undercoupling state, and then the quality factor of the resonance cavity can be improved. According to the reflecting rectangular resonance cavity, electromagnetic parameter measurement under multiple frequency points can be achieved, and the resonance cavity has the high quality factor characteristic and can achieve high-sensitivity measurement on imaginary parts of the complex dielectric constant and the complex permeability of the material.

Description

technical field [0001] The invention relates to a reflective rectangular resonant cavity, which works in the TE10p mode, is mainly used for the measurement of electromagnetic parameters of materials, and relates to the technical field of electromagnetic parameter measurement of microwave materials. Background technique [0002] In recent years, microwave technology has developed rapidly and has been involved in many aspects of engineering technology. In microwave technology, microwave materials are widely used in the production of various microwave devices such as circuit substrates, filters, antenna dielectric covers, dielectric waveguides, and matching terminals. The electromagnetic parameters of microwave materials include two parts, complex permittivity and complex permeability, usually expressed in the form of complex numbers ε=ε'-jε", μ=μ'–jμ", which are inherent parameters of the substance itself, reflecting the relationship between the substance and Electromagnetic ...

AI Technical Summary

Problems solved by technology

[0004] When measuring the complex permittivity or the imaginary part of the complex permeability of low-loss microwave materials, a cylindrical resonant cavity with a high quality factor is usually selected, but when the cylindrical resonant cavity is used for measurement, there will be a large number of non-resonant modes in the cavity. There is a lot of interference to the determination of the working mode, resulting in inaccurate measurement results, and it is difficult to measure the complex permeability with a cylindrical resonant cavity

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