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Passive elements are indispensable in RF systems and are used for matching networks, LC tank circuits, filtering, … etc. Passive elements can be simply classified into distributed elements including transmission lines and waveguides. As the operating frequency moves into the microwave spectrum, the distributed circuits have a higher Q factor, and thus they are usually used for high-frequency applications...
Magnetic coupled resonant wireless power transmission technology has broad prospects for development; this paper takes this as the object of study. Based on the traditional wireless power transmission system, a new three-winding system is proposed. Firstly, the transmission efficiency expressions of two systems and the factors influencing the efficiency are derived. Secondly, based on the chaotic...
The trend in isolated DC/DC converters is increasing output power demands and higher operating frequencies. Improved topologies combined with gallium nitride (GaN) transistors can allow for lower loss at higher frequencies. A major barrier to further improvement is the transformer design. With high current levels and high frequency effects the transformers can become the major loss component in the...
This paper models simplified transformer winding model by multi-conductor transmission line (MTL) model. Because inductance and resistance of transformer winding are frequency-dependent parameters, frequency effect on parameters should be considered when calculating distributed parameter matrices. Then, when solving for voltage distribution of winding model, the distributed parameter matrices should...
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