US 12,266,838 B2
Digital phase shift circuit and digital phase shifter
Yusuke Uemichi, Sakura (JP)
Assigned to Fujikura Ltd., Tokyo (JP)
Appl. No. 18/018,361
Filed by Fujikura Ltd., Tokyo (JP)
PCT Filed Aug. 10, 2022, PCT No. PCT/JP2022/030581
§ 371(c)(1), (2) Date Jan. 27, 2023,
PCT Pub. No. WO2023/119717, PCT Pub. Date Jun. 29, 2023.
Claims priority of application No. 2021-211348 (JP), filed on Dec. 24, 2021.
Prior Publication US 2024/0258670 A1, Aug. 1, 2024
Int. Cl. H01P 1/18 (2006.01); H01Q 3/38 (2006.01); H03H 11/16 (2006.01)
CPC H01P 1/184 (2013.01) [H01Q 3/38 (2013.01); H03H 11/16 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A digital phase shift circuit comprising:
a signal line extending in a predetermined direction;
two inner lines disposed on both one side and the other side of the signal line and separated a predetermined distance from the signal line;
two outer lines provided at positions which are farther from the signal line than the inner lines on both the one side and the other side;
a first grounding conductor electrically connected to one end of each of the inner lines and the outer lines;
a second grounding conductor electrically connected to other ends of the outer lines;
a first electronic switch connected between another end of an inner line of the inner lines on the one side and the second grounding conductor;
a second electronic switch connected between another end of an inner line of the inner lines on the other side and the second grounding conductor,
a capacitor connected between the signal line and the second grounding conductor; and
a fourth electronic switch connected in series to the capacitor,
wherein the predetermined distance is set to be less than 10 μm, and
a size of an upper electrode of the capacitor is equal to or less than a width of the signal line.