2024-03-04
Design of Dual-Band FPD with High Selectivity
By
Progress In Electromagnetics Research Letters, Vol. 118, 41-46, 2024
Abstract
In this brief, a dual-band filtering power divider (FPD) with high selectivity and independently controllable passbands is designed. The proposed FPD consists of asymmetric folded F-type resonators (AFFRs) and quarter-wavelength three parallel-coupled lines (TPCLs). The center frequencies of the dual bands can be determined by adjusting the physical lengths of AFFRs. Meanwhile, TPCLs can increase the transmission paths and introduce multiple transmission zeros (TZs) to achieve high selectivity. For demonstration, the proposed FPD is designed, fabricated, and measured. The center frequencies are 2.59/3.63 GHz with the 3-dB fractional bandwidths (FBWs) of 12.95% and 7.88%, and the isolation between port 2 and port 3 is better than 12.56/21.03 dB. The minimum insertion losses are better than 0.54/0.32 dB in each passband. The simulated results are compared with measured ones, and good agreement is realized.
Citation
Tiantian Zhang, Lei Chen, Meng Liu, Jinyi Liu, and Min Wang, "Design of Dual-Band FPD with High Selectivity," Progress In Electromagnetics Research Letters, Vol. 118, 41-46, 2024.
doi:10.2528/PIERL24010801
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