Filtering Power Divider With Good Isolation Performance and Harmonic Suppression
2016
A microstrip filtering power divider (FPD) with good isolation performance and harmonic suppression is presented. By replacing a simple resistor with a novel distributed stepped-impedance resonator network, better isolation and wider stopband are simultaneously attained. A transmission-matrix-based analysis method is then extensively described to determine the circuit geometrical parameters at the synthesis level by facilitating the incorporation of design indexes and structure dimension. A prototype FPD is designed, fabricated and measured. The proposed FPD exhibits a center frequency of 2.2 GHz ( $\text {f}_{0}$ ) with the isolation better than 17dB within the entire passband and a stopband extended to 12 GHz (5.45f 0 ).
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