Miniaturized Balanced Filtering Power Dividers With Arbitrary Power Division Ratio Using Multimode Dielectric Resonator in Single Cavity

• Published in: IEEE transactions on circuits and systems. II, Express briefs Vol. 69; no. 6; pp. 2707 - 2711
• Main Authors: Li, Hui-Yang, Xu, Jin-Xu, Zhang, Xiu Yin
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.06.2022; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Arbitrary power division ratio; balanced-to- unbalanced; balanced-to-balanced; Band-pass filters; Cavity resonators; Circuit design; compact size; Controllability; Coupling coefficients; Couplings; Dielectrics; Feeding; Filtering; filtering power divider; Filtration; multi-functional circuit; multi-mode dielectric resonator; Power dividers; Probes; Topology; Unbalance
• ISSN: 1549-7747; 1558-3791
• DOI: 10.1109/TCSII.2022.3144574

In this brief, miniaturized balanced-to-unbalanced (BTU) and balanced-to-balanced (BTB) filtering power dividers (FPDs) are proposed. Using one multi-mode dielectric resonator with multiple feeding probes, a single-cavity structure for BTU FPD is constructed, showing a compact size. Then, the circuit topology is analyzed, where the impedance in each branch can be adjusted to distribute the input power to two outputs with different ratios by only controlling the coupling coefficients. In this way, a BTU FPD with a very simple structure can be designed with arbitrary power division ratio. Besides, by replacing the two unbalanced output feeding probes in the BTU FPD as balanced ones, a BTB FPD can also be realized with controllable power division ratios. The working mechanism of the proposed designs is detailed. The proposed circuits are verified with good simulated and measured results.