US 12,033,022 B2
RFID auxiliary antenna device
Hiromi Murayama, Nagaokakyo (JP); Noboru Kato, Nagaokakyo (JP); Yoichi Saito, Nagaokakyo (JP); Noriyuki Ueki, 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 May 12, 2022, as Appl. No. 17/742,950.
Application 17/742,950 is a continuation of application No. PCT/JP2021/002171, filed on Jan. 22, 2021.
Claims priority of application No. 2020-078510 (JP), filed on Apr. 27, 2020.
Prior Publication US 2022/0269872 A1, Aug. 25, 2022
Int. Cl. H01Q 1/22 (2006.01); G06K 7/10 (2006.01); G06K 19/077 (2006.01); H01Q 7/00 (2006.01)
CPC G06K 7/10316 (2013.01) [G06K 19/07773 (2013.01); H01Q 1/2208 (2013.01); H01Q 7/00 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An RFID auxiliary antenna device configured to be disposed on an article that accommodates an RFID tag or communicates with the RFID tag, the RFID auxiliary antenna device comprising:
a conductive pattern that is configured to extend around a periphery of the article; and
a resonant circuit configured by a capacitance component generated between portions of the conductive pattern that face each other and an inductance component of the conductive pattern,
wherein the resonant circuit comprises a resonant frequency that corresponds to a communication frequency of the RFID tag,
wherein the conductive pattern circles the periphery of the article,
wherein the capacitance component includes a first capacitance component and a second capacitance component,
wherein the first capacitance component is a capacitance component generated between vicinities of ends in a circling direction in which the conductive pattern circles,
wherein the conductive pattern is elongated in the circling direction, and includes a discontinuous portion in the circling direction, and
wherein the second capacitance component is a capacitance component generated between respective conductive patterns of the discontinuous portion.