US 12,142,847 B2
Antenna device and antenna module having the same
Shoma Kajikiya, Tokyo (JP); and Masaki Matsushima, Tokyo (JP)
Assigned to TDK CORPORATION, Tokyo (JP)
Filed by TDK CORPORATION, Tokyo (JP)
Filed on Feb. 21, 2022, as Appl. No. 17/676,405.
Claims priority of application No. 2021-032359 (JP), filed on Mar. 2, 2021.
Prior Publication US 2022/0285841 A1, Sep. 8, 2022
Int. Cl. H01Q 5/10 (2015.01); H01Q 7/00 (2006.01)
CPC H01Q 7/00 (2013.01) [H01Q 5/10 (2015.01)] 20 Claims
OG exemplary drawing
 
1. An antenna device comprising:
a substrate; and
a first coil pattern, a second coil pattern, and a first capacitor which are provided on a surface of the substrate,
wherein both the first and second coil patterns are provided on one surface of the substrate,
wherein an opening region of the first coil pattern is smaller in area than an opening region of the second coil pattern,
wherein the first coil pattern is disposed so as to overlap the opening region of the second coil pattern;
wherein the first coil pattern and the second coil pattern are coupled to each other without being directly connected, and
wherein one of the first and second coil patterns is connected to the first capacitor to constitute a closed circuit.