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In this paper, a new class of shielded half-mode substrate integrated waveguide (SD-HMSIW) and shielded quarter-mode substrate integrated waveguide (SD-QMSIW) filtering power dividers (FPDs) have been presented. The proposed prototypes are capable of splitting/combining power and selecting frequency simultaneously. The SD-HMSIW and SD-QMSIW resonant cavities combine the features of compact size, high-quality factor, and low loss. To the best of author’s knowledge, it is the first time employing the shielded SIW structure for FPD designs. The six prototype circuits with pure or hybrid SD-HMSIW/SD-QMSIW resonators are designed and fabricated to validate the proposed concept. Multilayered structures are implemented to minimize the dimensions of the FPDs further. Transmission zeros distributing near the operating passband are introduced by cross-coupling mechanism. Both measured and simulated results indicate that the proposed FPDs with the shielded SIW structures exhibit not only filtering performance, but also the good magnitude and phase imbalance characteristics in the operating frequency band.

Design and Experiment of Filtering Power Divider Based on Shielded HMSIW/QMSIW Technology for 5G Wireless Applications