US 12,068,521 B2
Directional coupler
Kenta Seki, Kyoto (JP); Ryangsu Kim, Kyoto (JP); and Katsuya Shimizu, Kyoto (JP)
Assigned to MURATA MANUFACTURING CO., LTD., Kyoto (JP)
Filed by Murata Manufacturing Co., Ltd., Kyoto (JP)
Filed on Nov. 17, 2021, as Appl. No. 17/455,250.
Application 17/455,250 is a continuation of application No. PCT/JP2020/019828, filed on May 19, 2020.
Claims priority of application No. 2019-096776 (JP), filed on May 23, 2019.
Prior Publication US 2022/0077559 A1, Mar. 10, 2022
Int. Cl. H01P 5/18 (2006.01)
CPC H01P 5/18 (2013.01) [H01P 5/185 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A directional coupler comprising:
a main line;
a secondary line; and
a variable terminator,
wherein the variable terminator comprises a variable inductor,
wherein the variable inductor comprises:
a plurality of inductors in series with each other between an end of the secondary line and ground, and
a switch configured to selectively bypass at least one inductor of the plurality of inductors, and
wherein at least two inductors of the plurality of inductors are spiral inductors having a middle lead point.