US 12,456,789 B2
Transmission line comprising an element body having a signal conductor layer with sections of differing impedances having a specified relationship
Ryutatsu Mizukami, Nagaokakyo (JP); Shuichi Kezuka, Nagaokakyo (JP); Kuniaki Yosui, Nagaokakyo (JP); and Tomohiro Nagai, Nagaokakyo (JP)
Assigned to MURATA MANUFACTURING CO., LTD., Kyoto (JP)
Filed by Murata Manufacturing Co., Ltd., Nagaokakyo (JP)
Filed on Nov. 30, 2022, as Appl. No. 18/071,673.
Application 18/071,673 is a continuation of application No. PCT/JP2021/020197, filed on May 27, 2021.
Claims priority of application No. 2020-101538 (JP), filed on Jun. 11, 2020.
Prior Publication US 2023/0100141 A1, Mar. 30, 2023
Int. Cl. H01P 5/02 (2006.01); H01P 3/08 (2006.01)
CPC H01P 5/028 (2013.01) [H01P 3/08 (2013.01); H01P 3/085 (2013.01)] 29 Claims
OG exemplary drawing
 
1. A transmission line, comprising:
an element body; and
a signal conductor layer in the element body and having a linear shape; wherein
the transmission line includes a first impedance section, a second impedance section, a third impedance section, an impedance conversion section, and a reflection section;
the second impedance section, the reflection section, the first impedance section, the impedance conversion section, and the third impedance section are positioned in this order along the signal conductor layer;
a characteristic impedance in the first impedance section is lower than a characteristic impedance in the second impedance section and a characteristic impedance in the third impedance section;
a change amount of characteristic impedance per unit length in the reflection section is larger than a change amount of characteristic impedance per unit length in the impedance conversion section;
the reflection section is between the first impedance section and the second impedance section and includes a side extending in a front-back direction of the transmission line; and
line widths of the first, second, and third impedance sections are each constant or substantially constant.