Title:
携帯型無線周波数識別（ＲＦＩＤ）読取り機
Document Type and Number:
Japanese Patent JP5671060
Kind Code:
B2
Abstract:
A particular portable radio frequency identification (RFID) reader includes an active antenna array including a plurality of antenna elements to receive RFID signals from RFID devices. The antenna elements include control circuitry to control a beam pattern generated by the active antenna array. The portable RFID reader further includes sum circuitry and difference circuitry. The sum circuitry is operable to determine a sum signal by summing the RFID signals received by at least two of the plurality of antenna elements. The difference circuitry is operable to determine a difference signal between the RFID signals received by at least two of the plurality of antenna elements. The portable RFID reader also includes a controller to electronically steer the beam pattern and to determine a direction from the RFID reader to a particular RFID device.
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Inventors:
チェン， ミン
シー， フォン
ヴォイス， ケネス ジー．
シー， フォン
ヴォイス， ケネス ジー．
Application Number:
JP2012548996A
Publication Date:
February 18, 2015
Filing Date:
January 11, 2011
Export Citation:
Assignee:
ザ・ボーイング・カンパニーＴｈｅＢｏｅｉｎｇ Ｃｏｍｐａｎｙ
International Classes:
H01Q25/02; G01S3/32; G01S7/02; G01S13/74; G06K17/00; H01Q3/26
Attorney, Agent or Firm:
Yoshitaka Sonoda
Yoshinori Kobayashi
Yoshinori Kobayashi