ANTENNA FOR READER, SHELF WITH ANTENNA FOR PLACING ARTICLE, AND TABLE WITH ANTENNA FOR PLACING ARTICLE

摘要

PROBLEM TO BE SOLVED: To provide an antenna 15 for a reader which can shorten a communication speed for mutual communication between the antenna 15 for the reader and a plurality of electronic tags even if the size of a communication area is large by controlling the antenna 15 for the reader with a plurality of loop antennas A, B, C by feeding power to one feeding loop antenna A without necessity to switch and feed the plurality of the loop antennas A, B, C.;SOLUTION: The antenna has a feeding loop antenna A, at least a loop antenna B for non-feeding, and at least a loop antenna C for an outer periphery. The outer peripheries of respective antenna patterns 22a, 22b of the feeding loop antenna A and non-feeding loop antenna B are nearly enclosed at least partly by an antenna pattern 22c of the loop antenna C for the outer periphery when viewed in a planer view.;COPYRIGHT: (C)2011,JPO&INPIT