Identify te when the dielectric constant of the material cannot be estimated 011 Resonant Mode Method

Abstract

The invention discloses a method for identifying TE under the condition that the dielectric constant of the material cannot be estimated. 011 The resonant mode method is suitable for testing the microwave dielectric properties of low-loss materials when using the resonant cavity method or the parallel plate method 011 Resonance mode identification, this method first assumes that any resonance peak in the test frequency range is TE 011 The resonant peak of the mode is calculated by using the numerical method to calculate the corresponding dielectric constant of the sample. Afterwards, use a metal ring or a dielectric sheet to change the distance between the upper metal surface of the resonant cavity or parallel plate and the sample, and calculate the change of the resonant frequency using a numerical method according to the calculated dielectric constant corresponding to each resonant peak. and compare it with the actual test results. TE 011 The difference between the calculated value of the mode resonance frequency change and the measured value is generally within 2%, while the difference of other modes is more than one order of magnitude. Therefore, the method of the present invention can accurately and quickly determine the TE 011 Patterns are identified from a large number of interfering patterns.

Description

technical field [0001] The invention belongs to the technical field of microwave testing, relates to a testing technology for microwave dielectric properties of low-loss materials, and in particular relates to a method for identifying TE in the case where the dielectric constant of materials cannot be estimated 011 Resonant mode method. Background technique [0002] Low-loss microwave dielectric materials have a very wide range of applications in the field of microwave communications, and the accurate evaluation of their microwave dielectric properties is the basis for practical applications. The resonant cavity method and the parallel plate method are general methods for testing the microwave dielectric properties of low-loss materials. Both methods are based on the principle of microwave dielectric resonance and adopt TE 011 Resonant mode (TE in the resonant cavity method) 011 mode aka TE 01δ model). All microwave dielectric resonant systems are multi-resonant mode sys...

AI Technical Summary

Problems solved by technology

However, in many occasions, it is impossible to estimate the dielectric constant of the sample or the range of the estimated dielectric constant cannot meet the test requirements, TE 011 Pattern recognition becomes difficult

Especially, when the dielectric constant of the sample is low, the TE 011 The resonant frequency of the mode is sensitive to the change of the dielectric constant, and the spurious mode peak is more likely to appear in the TE 011 Near the mode peak, it is more likely to cause mode recognition errors

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