Design and analysis of multifrequency Wilkinson power dividers using nonuniform transmission lines

In this article, based on nonuniform transmission lines, the design of compact multifrequency Wilkinson power dividers (WPDs) is presented. This is accomplished by replacing the quarter-wave uniform transmission lines in the conventional WPD by multiband nonuniform transmission line transformers (NTLTs). The design of these NTLTs is performed under the even mode analysis of the WPD. A single isolation resistor is used between the two output ports whose value is determined using the simple odd mode analysis of the WPD. For verification purposes, a triple-frequency WPD and a quad-frequency WPD are designed, simulated, fabricated, and measured. The results of the full-wave simulations and the measurements verify the validity of the design procedure. © 2011 Wiley Periodicals, Inc. Int J RF and Microwave CAE, 2011. © 2011 Wiley Periodicals, Inc.

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