Complex dielectric constant measuring apparatus

Abstract

The utility model discloses a complex permittivity measuring unit, comprising an upper metal plate, a lower metal plate, a couple loop, a coaxial line, a computer and a network analyzer. The utility model is characterized in that: the utility model also comprises a short circuit board; wherein, one end of the lower metal plate is fixedly connected with one end of the short board and the other end of the lower metal plate is a free end; a sample is positioned at the centre-of-gravity position of the lower metal plate; the upper metal plate is positioned on the sample; one end of the upper metal plate is connected with the short circuit board and the other end of the upper metal plate is a free end; the coaxial line with the couple loop crosses the short circuit board and is electrically connected with the network analyzer. The utility model has the advantages that the short circuit board is arranged between the upper metal plate and the lower metal plate of the supply side to barrier radiation loss, so the radiation loss is reduced and measuring precision is increased.

Description

technical field [0001] The invention relates to a complex dielectric constant measuring device. Background technique [0002] Complex permittivity includes permittivity and loss. [0003] Referring to Figure 2, the document "Temperature characterization of dielectric resonator materials, Kaifez D, J EurCeram Soc, 2001, Vol.21, p2663-2667" discloses a complex permittivity measurement device using a parallel plate open cavity resonance method, It consists of a parallel plate open cavity, a network analyzer and a computer. The parallel plate open cavity includes an upper metal plate 1, a lower metal plate 2, a test sample 3, a coupling ring 4 and a coaxial line 5. The computer and network analyzer pass GPIB The cables are connected, and the input and output ends of the sweep signal of the network analyzer are connected to the coaxial line 5. The upper metal plate 1 and the lower metal plate 2 sandwich the test sample 3, and the signal is input to the parallel plate through the...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the deficiency of low measurement accuracy due to radiation loss in the prior art, the present invention provides a complex permittivity measurement device, which uses a short circuit board between the upper and lower metal plates on the feed side to block the radiation loss, which can reduce Radiation loss for improved measurement accuracy

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