Miniaturized Harmonic Suppressed Wilkinson Power Divider using Lumped Components and Resonators

Abstract

In this article, a miniaturized and harmonics suppressed Wilkinson power divider (WPD) is analytically designed. In the proposed divider composite transmission lines and resonator cells are utilized to eliminate unwanted harmonics and reduce circuit size. This structure has a 52% size reduction, compared to the typical WPD. According to the measured results, more than 22, 42, 45 and 40 dB suppression for 3rd, 4th, 5th and 6th harmonics are achieved. The presented WPD has lower than 0.15 dB insertion loss, more than 30 dB output ports isolation and more than 20 dB return losses in all ports at the operating frequency of 1.5 GHz is obtained.