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Propagation characteristics including complex propagation constants and effective wave impedance of pins-loaded microstrip line under operation of the first higher-order EH1 mode are numerically de-embedded. Although numerous methods have studied the features of EH1-mode, full-wave numerical extraction of the entire propagation characteristics of the pins-loaded EH1-mode microstrip line is for the...
The working fluid plays an important role in the flow and heat transfer performance of impingement jet. Though a lot of fluids such as air, water and oil, have been widely used in jet applications, there lack research works focus on the impacts of fluid properties on the overall heat transfer performance. This paper made comprehensive comparisons of five jet fluids (air, helium, water, FC-77 and MIL-7808)...
SIW is considered as an effective rectangular waveguide with periodically loaded vias on its two side walls instead of vertical plates. Effective wave impedances of substrate integrated waveguide (SIW) with varied via-to-via spacings are for the first time numerically de-embedded from three-dimensional (3-D) full-wave algorithm by virtue of a short-open-load (SOL) calibration approach. Full-wave simulation...
Effective wave impedances of substrate integrated waveguide (SIW) with square vias and circular vias are numerically de-embedded from three-dimensional (3-D) full-wave algorithm by virtue of a short-open-load (SOL) calibration approach. Full-wave simulation is at first conducted to model a finite-cell SIW with two feeding uniform waveguides. Afterwards, three calibration standards are established...
In this letter, a numerical short-open-calibration (SOC) technique is developed to be integrated with the electromagnetic (EM) software for direct de-embedding of propagation constant of substrate integrated waveguide (SIW). The two calibration standards, i.e., short- and open-end circuits can be perfectly built up by means of perfectly electric and magnetic walls in numerical algorithm. After three...
In this letter, a numerical short-open-calibration (SOC) technique is developed to be directly integrated with the commercial electromagnetic software for accurate extraction of propagation constant of substrate integrated waveguide (SIW) with longitudinally periodic metallic posts. Short- and open-end circuits can be exactly realized by means of electric and magnetic wall in software respectively...
A new evaluation index of flocculation effect - the vortex velocity gradient G' was introduced in this paper, on the basis of currently existing evaluation indexes of flocculation effect —turbulent kinetic energy k and effective energy consumption ε; then combined three indexes the CFD numerical simulation of lattice flocculent pond was conducted. The results indicate that the numerical calculation...
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