RF tag and method of manufacturing the RF tag
AssigneeFujitsu Limited
InventorsTakashi Yamagajo, Toru Maniwa, Manabu Kai
Life of this patent
Estimating the term…
Abstract
An RF tag is disclosed that includes an antenna and an integrated circuit connected to the antenna. The antenna includes a first radiating element, a second radiating element, a feeding part connected in series between the first and second radiating elements, and an impedance control part connected parallel to the feeding part. An auxiliary radiating element connected to one or both of the first and second radiating elements is used for radio communication with the integrated circuit before completion of the RF tag, and is not used for radio communication after the completion of the RF tag.
Claims13
An RF tag, comprising:
- an antenna;
- and
- an integrated circuit connected to the antenna,
- wherein the antenna includes
- a first radiating element formed of a first strip-shaped conductor;
- a second radiating element formed of a second strip-shaped conductor;
- a feeding part connected in series between the first and second radiating elements;
- and
- an impedance control part connected parallel to the feeding part, and
- wherein two sides of one of the first and second strip-shaped conductors along a direction in which the one of the first and second strip-shaped conductors extends are aligned with two sides of another one of the first and second strip-shaped conductors.
A method of manufacturing an RF tag to accompany a conductive object, the RF tag having an integrated circuit connected to an antenna, the method comprising:
- forming the antenna of a predetermined shape on one surface of a first insulating layer so that the antenna of the predetermined shape has a first radiating element, a second radiating element, an auxiliary radiating element connected to one or both of the first and second radiating elements, and a feeding part connected in series between the first and second radiating elements;
- changing the antenna of the predetermined shape into another shape;
- joining a second insulating layer to another surface of the first insulating layer;
- and
- performing a radio communication with the integrated circuit before completion of the RF tag, using the auxiliary radiating element connected to the one or both of the first and second radiating elements,
- wherein the auxiliary radiating element is not used for the radio communication after the completion of the RF tag.
Dependencies are inferred from the claim text.