Design Method for Multiband WPDs Using Multisection $LC$ -Ladder Circuits

This letter describes a design method for multiband Wilkinson power dividers (WPDs) utilizing multisection LC-ladder circuits. The design method is inspired by evenand odd-mode analysis techniques and an L-section matching network. Two trial dividers, which operate with dualband/triband, were fabricated at a 300-MHz band. The measured relative bandwidths of these dividers were more than 45% and 60%, and their insertion losses were less than 1 dB. The sizes of these WPDs were 17.0 × 13.3 mm
²
and 22.0 × 14.3 mm
²
, respectively. The measurement results for the fabricated dividers were in good agreement with theoretical results and the dividers show multiband characteristics.