Radio frequency identification tag with improved directivity and coverage distance stability
First Claim
1. A radio wave IC tag equipped with a micro-strip antenna, said micro-strip antenna including a radiation electrode to which an IC chip is mounted, a ground electrode and a dielectric interposed between said radiation electrode and said ground electrode, wherein said radiation electrode and said ground electrode have substantially the same size.
1 Assignment
0 Petitions
Accused Products
Abstract
A radio frequency IC tag has wide directivity and is rich in flexibility. A radiation conductor is formed on the entire surface of a dielectric formed of synthetic resin foam and a back conductor is formed on the entire back surface of the dielectric. An IC chip is mounted to the radiation conductor on the front side. An L-shaped slit is formed at the portion of the radiation conductor at which the IC chip is mounted. The radiation conductor and the back conductor have the same size or the size of the back conductor is not greater than twice the size of the radiation conductor.
40 Citations
25 Claims
- 1. A radio wave IC tag equipped with a micro-strip antenna, said micro-strip antenna including a radiation electrode to which an IC chip is mounted, a ground electrode and a dielectric interposed between said radiation electrode and said ground electrode, wherein said radiation electrode and said ground electrode have substantially the same size.
- 12. A radio wave IC tag equipped with a micro-strip antenna, said micro-strip antenna including a radiation electrode to which an IC chip is mounted, a ground electrode and a dielectric interposed between said radiation electrode and said ground electrode, wherein the size of said ground electrode is not greater than twice the size of said radiation electrode.
- 23. A radio wave IC tag equipped with a micro-strip antenna, said antenna having a micro-strip antenna structure including a radiation electrode to which an IC chip is mounted, a ground electrode and a dielectric interposed between said radiation electrode and said ground electrode, wherein said antenna has both-side directivity.
Specification