US 12,341,485 B2
Multilayer filter
Yuta Ashida, Tokyo (JP); Shuhei Sawaguchi, Tokyo (JP); Masahiro Tatematsu, Tokyo (JP); Keigo Shibuya, Tokyo (JP); Tomonori Terui, Tokyo (JP); and Tetsuzo Goto, Tokyo (JP)
Assigned to TDK CORPORATION, Tokyo (JP)
Filed by TDK CORPORATION, Tokyo (JP)
Filed on Jul. 28, 2023, as Appl. No. 18/361,410.
Claims priority of application No. 2022-124129 (JP), filed on Aug. 3, 2022.
Prior Publication US 2024/0048112 A1, Feb. 8, 2024
Int. Cl. H03H 7/01 (2006.01); H03H 1/00 (2006.01)
CPC H03H 7/0115 (2013.01) [H03H 7/0161 (2013.01); H03H 2001/0085 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A multilayer filter, comprising:
a multilayer body in which a plurality of dielectric layers are stacked; and
a conductor unit provided inside the multilayer body,
wherein the conductor unit includes an input/output portion, first, second, third, and fourth resonant circuits connected to the input/output portion, and a jump capacitor connecting the first resonant circuit and the fourth resonant circuit to each other,
the input/output portion includes an input/output port group including an unbalanced port and a pair of balanced ports or an input/output port group including two pairs of balanced ports,
each of the first, second, third, and fourth resonant circuits includes an inductor conductor including first and second ends, a first capacitor conductor connected to the first end, and a second capacitor conductor connected to the second end,
among the first, second, third, and fourth resonant circuits, the second and third resonant circuits are adjacent to each other in a first direction crossing a stacking direction of the plurality of dielectric layers and are magnetically coupled to each other,
a first electrode of the jump capacitor is connected to the inductor conductor of the first resonant circuit, and
a second electrode of the jump capacitor is connected to the inductor conductor of the fourth resonant circuit.