Patent ID: 9041514
Filing Date: 2015-05-26
Classification: G06K

Abstract:
1. An RFID system, comprising: an RFID tag having an antenna, an RFID reader/writer, the RFID tag and the RFID reader/writer conducting communication with each other, and a horizontal surface and/or a vertical surface of an environment of the RFID tag and the RFID reader/writer, wherein the horizontal surface and/or the vertical surface is a reflecting surface, wherein the RFID reader/writer includes an antenna that transmits and receives a linearly-polarized radio wave having a polarization plane slanted at a predetermined angle with respect to the reflecting surface, wherein the radio wave emitted from the antenna of the RFID reader/writer is incident on the reflecting surface and changes the polarization direction such that a direct radio wave and a reflected wave exist as cross-polarized components at a position of the RFID tag, the antenna of the RFID tag is disposed so as to have the polarization plane identical to the polarization plane of the direct radio wave, the antenna of the RFID tag receives and responds to the direct radio wave emitted from the antenna of the RFID reader/writer, and both the antenna of the RFID reader/writer and the antenna of the RFID tag are slanted in the same direction.