Design of a filtering power divider with high selectivity based on coupled lines

Design of High Selectivity Filtering Power Divider with High Out-of-Band Rejection

Electromagnetics ◽

10.1080/02726343.2019.1658162 ◽

2019 ◽

Vol 39 (7) ◽

pp. 473-480

Author(s):

Qingchun Cao ◽

Hui Liu ◽

Li Gao

Keyword(s):

High Selectivity ◽

Power Divider

Download Full-text

Synthesis of miniaturized wideband four‐way filtering power divider consisting of unequal‐width three‐coupled‐lines

International Journal of RF and Microwave Computer-Aided Engineering ◽

10.1002/mmce.22805 ◽

2021 ◽

Author(s):

Hongmei Liu ◽

Yihan Ma ◽

Mingyao Guan ◽

Shaojun Fang ◽

Zhongbao Wang

Keyword(s):

Power Divider ◽

Coupled Lines

Download Full-text

Tunable balanced to balanced filtering power divider with high common-mode suppression

Frequenz ◽

10.1515/freq-2019-0178 ◽

2020 ◽

Vol 74 (7-8) ◽

pp. 263-270

Author(s):

Cao Zeng ◽

Xue Han Hu ◽

Feng Wei ◽

Xiao Wei Shi

Keyword(s):

Return Loss ◽

High Selectivity ◽

Power Divider ◽

Center Frequency ◽

Differential Mode ◽

Common Mode ◽

Mode Suppression ◽

The Common ◽

Equal Power ◽

Good Agreement

AbstractIn this paper, a tunable balanced-to-balanced in-phase filtering power divider (FPD) is designed, which can realize a two-way equal power division with high selectivity and isolation. A differential-mode (DM) passband with a steep filtering performance is realized by applying microstrip stub-loaded resonators (SLRs). Meanwhile, six varactors are loaded to the SLRs to achieve the center frequency (CF) and bandwidth adjustment, respectively. U-type microstrip lines integrated with stepped impedance slotline resonators are utilized as the differential feedlines, which suppress the common-mode (CM) intrinsically, making the DM responses independent of the CM ones. A tuning center frequency from 3.2 to 3.75 GHz and a fractional bandwidth (12.1–17.6%) with more than 10 dB return loss and less than 2.3 dB insertion loss can be achieved by changing the voltage across the varactors. A good agreement between the simulated and measured results is observed. To the best of authors' knowledge, the proposed balanced-to-balanced tunable FPD is first ever reported.

Download Full-text