| Summary: | 碩士 === 國立高雄大學 === 電機工程學系碩士班 === 99 === A new Wilkinson power divider utilizing stepped impedance transmission lines and capacitive loads is presented. In this design, the capacitive loads are shunted near two output ports and can be implemented easily by two open stubs; as a result, the usage of lumped capacitors, which may cause some unexpected discontinuity, can therefore be avoided. Based on this structure, a small circuit area and high isolation between two output ports can be achieved at the same time. Furthermore, the proposed divider is a slow wave structure capable of pushing the first harmonic to a higher frequency, meaning that the non-operating band responses can also be improved.
In this study, the design equations of equal and unequal power ratio dividers have been derived for designing the proposed power dividers. Besides, the implemented circuit layouts also show that the sizes thereof are smaller than that of the conventional Wilkinson power divider.
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