A 1-4 GHz Single Stage Wilkinson Power Divider Design with Wideband Isolation Resistor

Abstract

In this paper, a 1-4 GHz wideband single-stage Wilkinson power divider (WPD) was designed, simulated and fabricated. Realizations are made on Rogers RT5870 dielectric material which has 0.7874 mm thickness and 2.33 dielectric constant. The thickness of the electrodeposited copper on the dielectric is 0.035 mm. According to the simulation results Wilkinson power divider has a maximum insertion loss of 0.1 dB, amplitude imbalance of up to 0.1 dB, and phase unbalance of up to 1 degree over the 1-4 GHz band. Since the microstrip lines were created by paying attention to the high frequency design principles, significant difference was not observed in the circuit and electromagnetic simulation results. When the implemented circuit is measured, maximum of 0.7 dB insertion loss, maximum of 0.1 dB amplitude imbalance between output ports and maximum of 1 degree phase imbalance are obtained over the 1-4 GHz band. To widen the bandwidth especially in terms of isolation between ports, Vishay RC series wideband resistor was used with 0603 package. For single stage WPD, these results are state-of-the-art. © 2022 Elsevier B.V., All rights reserved.