Abstract
Based on L-type dual-band impedance matching structure, this paper presents a new symmetric modified Wilkinson power divider for dual-band applications. In the matching structure, two transmission line stubs can be used to implement impedance matching and space isolation for two transmission ways, simultaneously. In the isolation structure, a single resistor is applied, and the design values are adjusted according to the center frequency ratio. In this proposed power divider, the ideal matching of all ports, equal power splitting and isolation between the output ports can be achieved. Theoretically, the nonlinear design equations for normalized parameters are directly derived based on the conventional even- and odd-mode analysis. In microstrip experiments, simulated and measured results of two fabricated power dividers with different frequency ratios are given. It can be clearly seen that there are good agreements between the theoretical and experimental results.
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