Multipole theory analysis of the capacitance matrix of circular rod arrays

Zheng, Qinhong; Zeng, Hongyu; Jiang, Shaoquan; Li, Manyi; Song, Ming

doi:10.1002/mop.11123

Cited by 4 publications

(2 citation statements)

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“…However, the particles filled in rubbers tend to agglomerate to reduce excess interfacial energy, which alters the dispersion and the distribution of particles and influences the properties in a complicated way . Filling observably changes viscoelasticity of materials by improving both storage modulus ( G ′) and loss modulus ( G ″) of the compounds especially in the low frequency ( ω ) region . The composites undoubtedly undergo a liquid‐to‐solid transition with increasing filler content.…”

Section: Introductionmentioning

confidence: 99%

“…Filling observably changes viscoelasticity of materials by improving both storage modulus ( G ′) and loss modulus ( G ″) of the compounds especially in the low frequency ( ω ) region . The composites undoubtedly undergo a liquid‐to‐solid transition with increasing filler content. The low‐ ω linear viscoelasticity that is sufficiently sensitive to changes in microstructure is widely used to study polymer dynamics and microstructural evolution of the composites …”

Section: Introductionmentioning

confidence: 99%

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Influence of annealing time on linear rheology and morphology of silica filled polyisoprene rubber and ethylene‐propylene rubber

Xie

Song

et al. 2018

J of Applied Polymer Sci

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Dynamic rheology in combination of fluorescence and molecular weight analysis was carried out to explore annealing‐induced structural evolutions in silica filled polyisoprene rubber (IR) and ethylene‐propylene rubber compounds containing rhodamine B modified silica of 2.5% in volume fraction. The results show that storage modulus of the ethylene‐propylene rubber compounds increases slightly with increasing annealing time while that of the IR compounds exhibits a peaking behavior at mediate silica contents. Fluorescence tests reveal that the silica agglomerates in both compounds while the agglomeration is more significant in the IR ones. Molecular weight analysis shows that IR in the compounds undergoes degradation during the annealing. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46679.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of annealing time on linear rheology and morphology of silica filled polyisoprene rubber and ethylene‐propylene rubber

Xie

Song

et al. 2018

J of Applied Polymer Sci

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Computer‐aided modeling of circular conductors

Musa

Sadiku

2009

Micro & Optical Tech Letters

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return loss is about 21 dB at the centre frequency of 1.8 GHz, and 3 dB passband width is about 4.5%. A comparison between the measurement and simulation is presented that the measured response strongly influenced by fabricated processing. CONCLUSIONSMiniaturized interdigital hairpin resonator is proposed. A four-pole cross-coupled bandpass filter is also implemented. The simple and accurate design technique makes extensive use of EM simulation. The validity of the proposed method was confirmed through the design, fabrication, and measurement of compact hairpin bandpass filter at 1.8 GHz on FR4 substrate. The insertion loss of the filter with using FR4 substrate is about 1.26 dB, however, the attenuation values out of the band was below 16.7 dB on the lower frequency region and ϳ20.6 dB in the higher frequency region. The compactness in the circuit size make the design of crosscoupled filters using the microstrip miniaturized hairpin resonators attractive for further developments and applications in modern communication systems.ABSTRACT: Circular conductors have manufacturing advantage compared with rectangular conductors in building microwave components such as filters and couplers which make it very popular for microwave designers. The accurate and efficient evaluation results of the capacitance, inductance, and characteristic impedance of circular conductors can help the designers to optimize the layout of the integrated circuits. In this article, we use the finite element method to compute the capacitance per unit length, inductance per unit length, and characteristic impedance of circular conductors. Mainly, we focus our computation and modeling on four types of systems as follows: a single circular wire above ground plane in a dielectric layer, a single circular conductor above a ground plane in a lossy dielectric layer, parallel coupled slab lines with homogenous dielectric layer, and three circular rod arrays in a rectangular trough with homogenous dielectric layer. Comparisons with published results demonstrate excellent agreement with the modeling.ABSTRACT: An equilateral-triangular microstrip antenna with reconfigurable polarization capability is proposed. The proposed design is achieved by loading with three L-type slits in the triangular patch and three PIN diodes are utilized to switch the slits on or off. According to the states of the diodes, the reconfigurable antenna can produce linear polarization or right hand circular polarization. An antenna prototype is implemented and measured.

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An efficient grid placing technique for 2-D method of moments analysis of coupled line structures

Villiers

Meyer

2007

Africon 2007

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Multipole theory analysis of the capacitance matrix of circular rod arrays

Cited by 4 publications

References 11 publications

Influence of annealing time on linear rheology and morphology of silica filled polyisoprene rubber and ethylene‐propylene rubber

Influence of annealing time on linear rheology and morphology of silica filled polyisoprene rubber and ethylene‐propylene rubber

Computer‐aided modeling of circular conductors

An efficient grid placing technique for 2-D method of moments analysis of coupled line structures

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