A 3.9GHz/63.6% FBW Multi-Mode Filtering Power Divider Using Self-Packaged SISL

Wideband and compact filtering power divider based on vertically installed planar structures

“…Great efforts have been devoted to the study of compact and low-loss filtering power dividers (FPDs). [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23] Among them, wide bandwidths can be achieved by introducing multimode resonators, [4][5][6][7][8][9][10] cascaded parallel-coupled lines, [11][12][13] transversal signal interference sections, 14 and open-/short-circuited stubs. [15][16][17][18] In addition, many other novel techniques and methods have been used in FPD designs, such as the substrate integrated waveguide, 19,20 the substrate integrated defected ground structure 21 and multi-layer substrate integrated suspended line.…”

“…[15][16][17][18] In addition, many other novel techniques and methods have been used in FPD designs, such as the substrate integrated waveguide, 19,20 the substrate integrated defected ground structure 21 and multi-layer substrate integrated suspended line. 22 In order to improve the bandpass and out-of-band rejection, stepped-impedance-line resonators 23 and open-ended microstrip lines 24 are also used. However, these techniques have complex topologies and large sizes.…”

“…Recently, multifunctional devices with filtering responses have raised great attentions. Great efforts have been devoted to the study of compact and low‐loss filtering power dividers (FPDs) 4–23 . Among them, wide bandwidths can be achieved by introducing multimode resonators, 4–10 cascaded parallel‐coupled lines, 11–13 transversal signal interference sections, 14 and open‐/short‐circuited stubs 15–18 .…”

“…Among them, wide bandwidths can be achieved by introducing multimode resonators, 4–10 cascaded parallel‐coupled lines, 11–13 transversal signal interference sections, 14 and open‐/short‐circuited stubs 15–18 . In addition, many other novel techniques and methods have been used in FPD designs, such as the substrate integrated waveguide, 19,20 the substrate integrated defected ground structure 21 and multi‐layer substrate integrated suspended line 22 . In order to improve the bandpass and out‐of‐band rejection, stepped‐impedance‐line resonators 23 and open‐ ended microstrip lines 24 are also used.…”

Admittance‐inverter‐based two‐section filtering power divider with OVER 40‐dB output isolation

“…To realize good isolation, the resistor was added at the input feeding line, 5,6 or between the output feeding lines, 7–10 where the 1/4 λ TLs were widely applied. Besides the 1/4 λ TLs, additional input resonators are loaded to the isolation element for good isolation 11 . For the above‐mentioned designs, the applied 1/4 λ TLs or additional input resonators will enlarge the circuit size of filtering power dividers.…”