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In this paper, a design method of compact dual-band power dividers with frequency-dependant power division ratios in two separated bands is proposed. A multisection coupled-line scheme is presented that takes advantage of the different odd- and even-phase velocities of a microstrip implemented coupled line. The proposed method is applicable to an extended frequency ratio of 1.4–3 compared to the formerly...
This study constructs stepped-impedance coupled-lines for a dual-band coupler design over a frequency ratio range of 1.8-3.0. The proposed structure demonstrates good dual-band performance and compact size due to the centric arrangement of the excitation ports, which allows a more space-efficient circuit configuration. The developed synthesis method utilizes stepped impedance coupled-line to achieve...
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