Abstract
In this article, a novel and simple dual-frequency Wilkinson power divider is proposed. Considering that there is only one section of transmission line linking the input port and the output port directly as a part of the transformer, this power divider is very compact. To satisfy the dual-frequency characteristic, the traditional quarter-wavelength transformer is replaced by the structure which consists of a section of transmission line and a parallel stub at the input port. Besides, in order to obtain the ideal isolation with keeping the ideal matching at the output ports, a resistorr R and series LC components are added. Furthermore, closed-form design equations of this proposed power divider are obtained to simplify the design procedure. The simulation results of four examples indicate that all the features of the power divider can be fulfilled at dual-frequency simultaneously. Furthermore, measurement results of a fabricated power divider operating at 1 GHz and 4 GHz verify the design concept of this proposed power divider.
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