US 12,334,620 B2
Marchand balun formed in a laminated substrate and including main lines and sub-lines formed by partial lines having specified distance relationships
Takuya Sato, Kyoto (JP)
Assigned to MURATA MANUFACTURING CO., LTD., Kyoto (JP)
Filed by Murata Manufacturing Co., Ltd., Kyoto (JP)
Filed on Oct. 6, 2022, as Appl. No. 17/938,391.
Application 17/938,391 is a continuation of application No. PCT/JP2021/016433, filed on Apr. 23, 2021.
Claims priority of application No. 2020-084220 (JP), filed on May 13, 2020.
Prior Publication US 2023/0036397 A1, Feb. 2, 2023
Int. Cl. H01P 5/10 (2006.01); H01F 27/28 (2006.01); H01F 27/29 (2006.01); H03H 7/42 (2006.01)
CPC H01P 5/10 (2013.01) [H01F 27/2804 (2013.01); H01F 27/29 (2013.01); H03H 7/42 (2013.01); H01F 2027/2809 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A balun comprising:
an unbalanced terminal;
a first balanced terminal and a second balanced terminal;
a first main line having a first end that is connected to the unbalanced terminal;
a second main line having a first end that is connected to a second end of the first main line, and having a second end that is open;
a first sub-line connected between the first balanced terminal and a reference potential, and coupled to the first main line; and
a second sub-line connected between the second balanced terminal and the reference potential, and coupled to the second main line,
wherein the second sub-line comprises a first partial line connected to the second balanced terminal, and a second partial line connected between the first partial line and the reference potential,
wherein the second main line comprises a third partial line connected to the first main line, and a fourth partial line connected in series to the third partial line, and
wherein a distance between the first partial line and the third partial line is shorter than a distance between the second partial line and the fourth partial line.