Radio communication system

A wireless communication system and antenna technology, applied in transmission systems, near-field transmission systems using transceivers, electromagnetic radiation induction, etc. Radio wave interference, the effect of improving processing power
CN1639993AInactive Publication Date: 2005-07-13SHARP KK
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHARP KK
Publication Date
2005-07-13
Estimated Expiration
Not applicable · inactive patent

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Abstract

The RFID system 10 has an interrogator 11, an interrogator antenna 12 connected to the interrogator 11 to transmit a signal, and a radio wave reflection sheet 21 that reflects a signal transmitted from the interrogator antenna 12 and includes a part of a parabolic curve or a curve similar thereto. , The wireless tag 13 that communicates with the interrogator 11 by receiving and responding to a signal from the interrogator antenna 12 at least through the radio wave reflecting sheet 21 . The signal passing through without being irradiated to the wireless tag 13 is reflected by the radio wave reflection sheet 21 toward the inside of the radio wave reflection sheet 21 . Therefore, signal dispersion can be prevented, and the signal from the interrogator antenna 12 can be effectively used.
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Description

technical field

[0001] The present invention relates to a wireless communication system for communication between an interrogator and a transponder.

[0002] In the present invention, "the vicinity of the focal point" includes the focal point, the "reflecting sheet" includes reflectors of shapes other than sheet-like, and the "near the center point" includes the center point. In addition, in the present invention, "rotation" includes angular displacement of 0 degrees or more (including 0 degrees) and 360 degrees or less, "substantially central part" includes central part, and "substantially U-shaped" includes U-shaped. Background technique

[0003] In one wireless communication system, there is a mobile identification (hereinafter referred to as RFID) system. The conventional RFID system is a system with read / write functions, and is equipped with an interrogator and a transponder. Transponders, known as wireless tags, store information, or transmit stored information, as d...

Claims

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