US 11,855,593 B2
Method for isolating transmission lines of radio frequency power amplifier and transmission structure for radio frequency power amplifier
Huan Huang, Shenzhen (CN); and Jiashuai Guo, Shenzhen (CN)
Assigned to LANSUS TECHNOLOGIES INC., Shenzhen (CN)
Filed by LANSUS TECHNOLOGIES INC., Shenzhen (CN)
Filed on Apr. 10, 2023, as Appl. No. 18/132,425.
Application 18/132,425 is a continuation of application No. PCT/CN2022/090601, filed on Apr. 29, 2022.
Claims priority of application No. 202210053366.X (CN), filed on Jan. 17, 2022.
Prior Publication US 2023/0246608 A1, Aug. 3, 2023
Int. Cl. H03F 3/24 (2006.01); H03F 3/60 (2006.01)
CPC H03F 3/24 (2013.01) [H03F 3/60 (2013.01); H03F 2200/451 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A method for isolating transmission lines of a radio frequency power amplifier, comprising:
setting a distance between adjacent two of transmission lines on a chip substrate to be greater than 2.5 times a width of each of the transmission lines, and disposing shielding lines at an inner side of each of the transmission lines and an outer side of each of the transmission lines opposite to the inner side;
wrapping a permalloy layer on an outer wall of each of the transmission lines; and
wrapping an aluminum layer on an outer wall of the permalloy layer, defining a plurality of grooves on an outer wall of the aluminum layer at intervals, where the plurality of the grooves are recessed inward and in an inverted triangular structure.