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The influences of the rough interface on the impedance of solid lithium phosphorus oxynitride (LiPON) in its metal/insulator/metal (MIM) cells over a wide frequency are studied. Using magnetron sputtering method, Al/LiPON/Al cells with different rough interfaces are fabricated. With increasing the Al films electrode roughness, the deposited LiPON films on these electrodes are correspondingly roughened,...
Detecting the load currents is a basic control method of paralleled active power filter (PAPF). The stability and compensation effect of the system would be influenced by the interactions of the load, weak grid and the paralleled active power filter (PAPF), when the load can't be equivalent to an ideal harmonic current source. The impedance models are established to analyze the stability of the system,...
The interaction between STATCOM and voltage-source inverter (VSI) may cause instability in an islanded micro-grid. Impedance models of storage battery power convert system (PCS) and cascaded multilevel static synchronous compensator (STATCOM) are established based on which the interaction mechanism between PCS and STATCOM is studied. Using Nyquist stability criterion and admittance ratio analysis,...
This paper presents a new methodology for synthesizing the transfer impedance of shielded cables in simulation program with integrated circuit emphasis (SPICE). Compared to the traditional models that use lumped equivalent circuits, the new modelling method uses the flow chart of the z-Domain discrete transfer function directly in SPICE and the process of calculating the equivalent circuit parameters...
As a rectangular enclosure with apertures can be represented by a waveguide with its termination short circuited, the shielding effectiveness of the enclosure is calculated by the transmission line model. The voltage along the transmission line is obtained analytically, and the calculated shielding effectiveness fits well to the previous reference. Slots in different shapes are discussed, and multimodes...
This paper presents an unequal Wilkinson power divider operating at arbitrary dual band without reactive components (such as inductors and capacitors). To satisfy the unequal characteristic, a novel structure is proposed with two groups of transmission lines and two parallel stubs. Closed-form equations containing all parameters of this structure are derived based on circuit theory and transmission...
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