Modified Wilkinson Power Divider Using Transmission Lines for Various Terminated Impedances and an Arbitrary Power Ratio

Abstract

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. ⓒ

Unbalanced Two-Way Filtering Power Splitter for Wireless Communication Systems

“…The 3D momentum visualization (in ADS) of the simulated FPS layout, with visible mesh and current distribution at 2.6 GHz, are shown in Figure 8. A performance comparison with some related works [9][10][11][21][22][23] is presented in Table 2 and shows that the proposed FPS is of compact size, 0.0374 (λg) 2 , where λg is the guided-wavelength of the 50 Ω microstrip line at the fundamental resonant frequency of the FPS passband.…”

“…One state-of-the-art technique is to replace the quarterwavelength transformers in a Wilkinson power divider with channel filters [6][7][8]. Twoway, single-band filtering power dividers with an unequal output power ratio have been proposed and achieved in [9][10][11]. In Reference [9], the authors relied on modified two-port coupled lines with short-circuit and open-circuit stubs, in achieving an unequal filtering power divider.…”

“…Though the technique was hailed for its effectiveness in achieving miniaturized filtering power divider devices, the FPS reported in this paper is even better in further reducing the device footprint in addition to the design simplicity. Reference [11] reported a modified Wilkinson power divider that uses uniform quarterwavelength transmission lines for various terminated impedances and arbitrary power ratio. The reported power 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.…”

“…Hence, results can easily be reproduced by researchers or design engineers all over the world just by simply choosing their design specifications and utilizing the proposed formulations. Another benefit of the proposed work, when compared to those reported in [6][7][8][9][10][11][12][13][14] is it does not rely on tuning and optimization to achieve matching at the three input/output ports. Microstrip technology is used in the implementation of the FPS in order to validate the circuit model through layout simulation.…”

Symmetric 3dB Filtering Power Divider with Equal Output Power Ratio for Communication Systems

“…[3], [4] proposed FPDs achieved by replacing the quarter-wavelength transformers in a Wilkinson power divider with bandpass filters. Two-way integrated FPDs with equal output power ratio have been proposed and achieved in [5]- [7], while those with unequal or arbitrary power ratios have been reported in [8]- [10]. Other papers have reported integrated FPDs that exhibit dual-band filtering characteristics [11], [12].…”