The simplified design approach presented in this letter for realization of a dual‐band Wilkinson power divider (WPD) comprising of three transmission line sections reduces the mathematical complexity to half as compared to earlier presented work. Based on the mathematical derivation through even mode circuit analysis only, design guidelines are presented. Comparison is drawn between the new and the previous design guidelines. In order to show the efficacy of the proposed simplified design approach, a dual‐band WPD operating at 1 and 3 GHz is designed, simulated, and manufactured. The simulated and measured results show excellent conformance in the S‐parameter response. Measured figure of merits (FOMs) show good performance of the WPD. For instance, insertion loss comes out to be less than 3.3 dB, whereas return loss and isolation between the ports is better than −30 and −27 dB, respectively, at the two frequencies. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2374–2377, 2016

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This paper introduces a new scheme for effective output port isolation and return loss in RF-filtering divider design. The proposed design incorporates an extended transmission line and a conventional resistor as isolation elements.The technique has a simpler microstrip circuit implementation when it comes to the integration of a single-band bandpass filter with a Wilkinson power divider to achieve simultaneous filtering-dividing action. It is established that if a band-pass filter with a certain fractional-bandwidth is matched to 70.7 Ω , a transmission line section and isolation resistor are sufficient for achieving reasonable output port return loss and isolation in the resulting filtering divider.In experimental validation, two single-band band-pass filters, namely a coupled-line filter and an open-loop coupled resonator triangular filter with center frequencies of 3 GHz and 1 GHz, respectively, effectively replace the conventional quarter-wavelength transformers for equal division of power. The proposed filtering divider structures were fabricated and a reasonable agreement was observed between respective simulated and measured S-parameter responses. The experimental results for a coupled-line filtering power divider and an open-loop triangular filtering power divider were as follows: 1 dB fractional-bandwidths of 15.3% and 12%, port isolations better than 31 dB and 20 dB, and good out-of-band performances up to 2.67f 0 and 2.85f 0 , respectively.