US 12,316,004 B2
Array antenna device
Yuta Hasegawa, Sakura (JP)
Assigned to Fujikura Ltd., Tokyo (JP)
Appl. No. 18/273,889
Filed by Fujikura Ltd., Tokyo (JP)
PCT Filed Nov. 9, 2022, PCT No. PCT/JP2022/041645
§ 371(c)(1), (2) Date Jul. 24, 2023,
PCT Pub. No. WO2023/203798, PCT Pub. Date Oct. 26, 2023.
Claims priority of application No. 2022-071014 (JP), filed on Apr. 22, 2022.
Prior Publication US 2024/0396226 A1, Nov. 28, 2024
Int. Cl. H01Q 21/00 (2006.01); H01Q 1/48 (2006.01)
CPC H01Q 21/0006 (2013.01) [H01Q 1/48 (2013.01)] 6 Claims
OG exemplary drawing
 
1. An array antenna device comprising:
an antenna layer;
a ground layer; and
a feed line layer,
wherein the antenna layer, the ground layer, and the feed line layer are stacked in this order, with a dielectric layer sandwiched between the antenna layer and the ground layer, and a dielectric layer sandwiched between the ground layer and the feed line layer,
a first antenna element, a second antenna element, a third antenna element, and a fourth antenna element are arranged in the antenna layer in this order in a first direction in a plan view, and an antenna element row includes the first antenna element, the second antenna element, the third antenna element, and the fourth antenna element,
the first antenna element and the second antenna element are connected via a first power supply line extending in the first direction,
the third antenna element and the fourth antenna element are connected via a second power supply line extending in the first direction,
a first slot and a second slot are formed in the ground layer, the first slot overlapping the first power supply line and the first slot being formed equidistant from the first antenna element and the second antenna element, in a plan view, and the second slot overlapping the second power supply line and the second slot being formed equidistant from the third antenna element and the fourth antenna element, in a plan view,
a third power supply line is formed in the feed line layer, the third power supply line being electromagnetically coupled to the first power supply line via the first slot, the third power supply line being electromagnetically coupled to the second power supply line via the second slot, and the third power supply line supplying power to each antenna element of the antenna element row,
the third power supply line includes an extension portion extending in the first direction along the antenna element row, a first branch line overlapping the first slot and a second branch line overlapping the second slot in a plan view, the first branch line and the second branch line branching from the extension portion,
a length of the first branch line up to the first slot is equal to a length of the second branch line up to the second slot,
in a plan view, a direction in which a tip end portion of the first branch line enters the first slot is opposite to a direction in which the extension portion extends in the first direction, and
in a plan view, a direction in which a tip end portion of the second branch line enters the second slot is opposite to a direction in which the extension portion extends in the first direction.