Compact size of a Wilkinson power divider using impedance coordinate tracking based on T-shaped line

Abstract

This article presents the compact size of the Wilkinson power divider using T-shaped line through the impedance coordinate tracking progress at Smith-chart. After the series line impedance, electrical length, and stub impedance were calculated, the T-shaped line was designed through the impedance coordinate tracking in the Smith-chart. This reduced the entire size of the proposed power divider by an average of 4.81 times (79.2%) more than conventional structure. The experimental results of the S-21, S-31, and S-11 are 3.06 dB, 3.08 dB, and 25.04 dB at center frequency of 2.318 GHz, respectively. The experimented S-parameter difference between S-21 and S-31 is 3.0 dB. This proposed Wilkinson power divider can be applied to mobile communications and wireless medical communication systems.