Title:
ANTENNA FOR RF TAGS AND RF TAG
Document Type and Number:
WIPO Patent Application WO/2024/075325
Kind Code:
A1
Abstract:
Provided are an antenna for RF tags that operates in a wide frequency band, and an RF tag. An antenna 1 for RF tags according to the present invention comprises an insulating substrate 10, a main waveguide element 20, a base plate 30 that is electrically connected to the main waveguide element, an auxiliary waveguide element 40 that is connected to the main waveguide element via an IC chip 60, and a capacitor 203 for frequency adjustment. At least part of the auxiliary waveguide element overlaps the base plate with a coating layer 70 composed of an insulating material interposed therebetween, whereby a capacitor is formed by the auxiliary waveguide element, the coating layer, and the base plate. The insulating substrate is enclosed in ring form by the main waveguide element, the base plate, and the auxiliary waveguide element. The capacitor for frequency adjustment is provided between the main waveguide element and the auxiliary waveguide element. Due to the insulating substrate being enclosed in ring form, inductance increases, a resistance value increases, and the Q value of a series resonance circuit decreases. As a result, a bandwidth increases, making it possible to obtain an antenna for RF tags that operates in a wide frequency band and an RF tag.
Inventors:
SUGIMURA SHIRO (JP)
Application Number:
PCT/JP2023/014141
Publication Date:
April 11, 2024
Filing Date:
April 05, 2023
Export Citation:
Assignee:
PHOENIX SOLUTION CO LTD (JP)
International Classes:
G06K19/077; H01Q1/38; H01Q23/00
Domestic Patent References:
| WO2015015604A1 | 2015-02-05 | |||
| WO2011155402A1 | 2011-12-15 |
Foreign References:
| JP2011109552A | 2011-06-02 | |||
| JPS62123342A | 1987-06-04 | |||
| US20220069435A1 | 2022-03-03 | |||
| US20140284388A1 | 2014-09-25 |
Attorney, Agent or Firm:
UMINO Toru (JP)
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