US 11,915,084 B2
Antenna device and RFID tag communication device
Hiromi Murayama, Nagaokakyo (JP); Noboru Kato, Nagaokakyo (JP); Noriyuki Ueki, Nagaokakyo (JP); Yoichi Saito, Nagaokakyo (JP); and Makoto Yasutake, Nagaokakyo (JP)
Assigned to MURATA MANUFACTURING CO., LTD., Nagaokakyo (JP)
Filed by Murata Manufacturing Co., Ltd., Nagaokakyo (JP)
Filed on Apr. 21, 2022, as Appl. No. 17/660,073.
Application 17/660,073 is a continuation of application No. PCT/JP2020/046520, filed on Dec. 14, 2020.
Claims priority of application No. 2020-078454 (JP), filed on Apr. 27, 2020.
Prior Publication US 2022/0245421 A1, Aug. 4, 2022
Int. Cl. G06K 19/077 (2006.01); H01Q 7/00 (2006.01)
CPC G06K 19/07773 (2013.01) [H01Q 7/00 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An antenna device comprising:
a plurality of loop antennas with each of the loop antennas including:
a plurality of parallel circuits each having a capacitor and a resistance element; and
a plurality of looped conductors in a shape of a divided loop,
wherein the plurality of looped conductors are connected to each other via the plurality of parallel circuits, respectively, such that the plurality of looped conductors and the plurality of parallel circuits collectively form a loop.