This article presents a modified unequal power divider with a complex isolation component for enhanced physical and electrical isolation between output ports. In the proposed power divider, the complex isolation component is positioned at an arbitrary phase angle inside a quarter‐wave transmission line. A theoretical analysis is performed to derive the design equations for the proposed unequal power divider. For validating the performance of the proposed unequal power divider, samples of the device operating at the center frequency of 2 GHz were fabricated and tested. The test results are in good agreement with the simulation results. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:322–324, 2015

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This paper introduces a modified Wilkinson power divider that uses uniform transmission lines for various terminated impedances and an arbitrary power ratio. For the designed power ratio, the proposed divider changes only the electrical lengths of the transmission lines between the input and output ports, and those between the output ports and the isolation resistor. In this case, even when various termination impedances of the ports exist, the divider characteristics are satisfied. To verify the feasibility of the proposed divider, two circuits were designed to operate at a frequency of 2 GHz with 2:1 and 4:1 power splitting ratios and various terminated impedances of 40, 70, and 60 Ω for one circuit, and 50, 70, and 60 Ω for the other. The measurement and simulation results were in good agreement. This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. ⓒ

This article presents an unequal Gysel power divider (UGPD) based on circuit transformation, which is converted from a Π‐ to a T‐type circuit. The Π‐type circuit of a conventional unequal Gysel divider consists of two different value resistors and its connection transmission line. In the proposed T‐type circuit, the dummy transmission line and the other transmission line with shunt resistor at center position is connected in parallel. Theoretical analysis was performed to derive the design equations for the proposed circuit conversion. For the validation of the circuit transformation, the UGPD using a T‐type circuit at the center frequency of 2 GHz was fabricated and measured. The measured characteristics agreed well with the simulation results. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:1529–1531, 2015