发明名称 |
PORTABLE RADIO FREQUENCY IDENTIFICATION (RFID) READER |
摘要 |
<p>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.</p> |
申请公布号 |
SG181819(A1) |
申请公布日期 |
2012.08.30 |
申请号 |
SG20120045357 |
申请日期 |
2011.01.11 |
申请人 |
THE BOEING COMPANY |
发明人 |
CHEN, MING;SHI, FONG;VOYCE, KENNETH G. |
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