A novel characterization method for water trees based on the transmission characteristics of complementary split ring resonators

Abstract

In order to achieve rapid and simple non-destructive testing of water trees in materials, a novel water tree characterisation method based on the complementary split ring resonators (CSRR) was proposed. The characteristics of circular CSRR and rectangular CSRR were analysed in high-frequency electromagnetic simulation software. The resonant frequency of CSRR was found to be correlated to the dielectric constant of the materials. In addition, the lumped equivalent circuit parameters of CSRRs were also calculated and simulated. The results of electromagnetic simulations and circuit simulations achieved good consistency. In the experimental part, sensors based on the two kinds of CSRRs were fabricated and were used to detect the water tree defects in low-density polyethylene samples. The experiment results showed that the method of using CSRR sensors to detect water tree is feasible.

Aging Characterization of Modified Insulating Paper Based on the Transmission Characteristics of Microstrip Resonant Sensors

“…CSRR and IDCS-DGS sensors are widely used in the detection field because of their high sensitivity, and have been studied in the aging characterization of traditional electrical insulation materials [23,24]. In this paper, CSRR and IDCS-DGS sensors are further applied to the thermal aging characterization of modified insulating paper.…”

“…The dimensions of CSRR structure can be adjusted to change the resonant frequency. More detailed analysis of this structure was carried out by Xiao et al [23]. Figure 4b shows the IDCS-DGS sensor and its IDCS-DGS etched structure [24].…”

“…Our team has proposed a method based on microstrip resonant sensors to characterize the aging of insulating materials. Based on this method, the complementary split ring resonator (CSRR) was successfully used to detect the presence of water trees inside LDPE samples, and it was also found that the circular CSRR was more sensitive to the presence of water trees than the rectangular CSRR [23]. The interdigital-capacitor-shaped defected ground structure resonator (IDCS-DGS) was used to easily characterize the degree of hygrothermal aging of the epoxy resin and accelerated the analysis process compared to conventional methods [24].…”

Hygrothermal ageing characterisation of epoxy resin based on transmission characteristics of microwave resonator with interdigital‐capacitor‐shaped defected ground structure

“…Various defects or resonant structures can be utilised in addition to the basic microstrip transmission line to improve transmission efficiency. Some kinds of resonators have been used for the detection of biological molecules [13], liquid concentration [14], and material defects [15,16] due to their simple geometry, easy fabrication, low cost, and high sensitivity. The resonator used in this paper is IDCS-DGS.…”

Annular acoustic impedance metasurfaces for encrypted information storage

“…Metamaterials have attracted great attention owing to their extensive functionality 1 . Various novel applications have been reported and implemented during the last decade, including wave regulation [2][3][4][5] , heat flow management 6 , invisibility cloaking 7,8 , holographic imaging 9 and non-destructive evaluation 10,11 . Information processing based on metamaterials [12][13][14] is currently emerging, accompanied with a rising demand on minimization, integration, and increased information capacity.…”