US 12,218,396 B2
Multi-layered band-pass filter device
Longfei Yi, Tokyo (JP); and Shigemitsu Tomaki, Tokyo (JP)
Assigned to TDK CORPORATION, Tokyo (JP)
Filed by TDK CORPORATION, Tokyo (JP)
Filed on Nov. 3, 2022, as Appl. No. 17/979,884.
Claims priority of application No. 2021-183135 (JP), filed on Nov. 10, 2021.
Prior Publication US 2023/0143899 A1, May 11, 2023
Int. Cl. H01P 1/203 (2006.01); H01P 7/08 (2006.01)
CPC H01P 1/20309 (2013.01) [H01P 1/20372 (2013.01); H01P 7/08 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A filter comprising:
a first resonator and a second resonator each including a first conductor part and a second conductor part having an impedance smaller than an impedance of the first conductor part;
a first stub resonator composed of a distributed constant line that is electrically and directly connected to the first conductor part of the first resonator; and
a second stub resonator composed of a distributed constant line that is electrically and directly connected to the first conductor part of the second resonator, wherein
a shape of the first stub resonator and a shape of the second stub resonator are different from each other.