A novel wideband Wilkinson divider using parallel branch lines

A novel wideband branch line Wilkinson divider is proposed. Branch lines are introduced to replace multiple resistors used in the multistage Wilkinson divider to increase the bandwidth of a single‐stage Wilkinson divider. To demonstrate its performance, a modified single‐stage Wilkinson divider with four branch lines has been fabricated and measured. Results show that the measured input return loss, output return loss, and isolation are better than 12.4, 11.6, and 15 dB, respectively, across a 72% bandwidth from 18.8 to 40 GHz.