**5. Conclusions**

By using a multistage impedance transformer and an L-type matching circuit design method to downsize the microwave power divider, the characteristics are equal to or higher than those of the conventional Wilkinson power divider designed based on the distributed circuit theory. First, it was shown that in a circuit capable of dualband operation, a wideband circuit or two-frequency operation is possible by moving the operating two frequencies closer to or further away from each other. Next, a circuit configuration that enables three-frequency matching is shown, and by utilizing the feature that the frequency at the center of the three matching frequencies can be arbitrarily selected, a divider having an absolute constant bandwidth in the UHF/SHF band was made possible. Finally, it was shown that the operating band can be expanded by increasing the number of stages of the LC-ladder circuit and that an ultra-wideband circuit exceeding 100% can be realized if the number of stages is 8. These results have been clarified analytically and experimentally.
