Communications: electrical – Condition responsive indicating system – Specific condition
Reexamination Certificate
2007-03-06
2007-03-06
Wu, Daniel (Department: 2612)
Communications: electrical
Condition responsive indicating system
Specific condition
C340S572700
Reexamination Certificate
active
10959633
ABSTRACT:
An embodiment of the present invention provides an RFID tag reading system, comprising an antenna system associated with a portal through which said RFID tag may pass, said antenna system comprising: a plurality of non-uniformly spaced antenna elements arranged substantially linearly; a power divider for dividing transmit power thereby coupling signals to said plurality of antenna elements; and a beamforming network capable of phase shifting the signals between the power divider and the plurality of antenna elements such that radiated signals from each antenna element add coherently such that the radiated electromagnetic energy is focused at a focal point in the near field region or in the Fresnel region of said antenna system.
REFERENCES:
patent: 5061941 (1991-10-01), Lizzi et al.
patent: 5312790 (1994-05-01), Sengupta et al.
patent: 5317309 (1994-05-01), Vercellotti et al.
patent: 5427988 (1995-06-01), Sengupta et al.
patent: 5486491 (1996-01-01), Sengupta et al.
patent: 5593495 (1997-01-01), Masuda et al.
patent: 5635433 (1997-06-01), Sengupta
patent: 5635434 (1997-06-01), Sengupta
patent: 5640042 (1997-06-01), Koscica et al.
patent: 5693429 (1997-12-01), Sengupta et al.
patent: 5694134 (1997-12-01), Barnes
patent: 5766697 (1998-06-01), Sengupta et al.
patent: 5830591 (1998-11-01), Sengupta et al.
patent: 5846893 (1998-12-01), Sengupta et al.
patent: 5886867 (1999-03-01), Chivukula et al.
patent: 5990766 (1999-11-01), Zhang et al.
patent: 6074971 (2000-06-01), Chiu et al.
patent: 6377142 (2002-04-01), Chiu et al.
patent: 6377217 (2002-04-01), Zhu et al.
patent: 6377440 (2002-04-01), Zhu et al.
patent: 6404614 (2002-06-01), Zhu et al.
patent: 6466131 (2002-10-01), Tuttle et al.
patent: 6492883 (2002-12-01), Liang et al.
patent: 6514895 (2003-02-01), Chiu et al.
patent: 6525630 (2003-02-01), Zhu et al.
patent: 6531936 (2003-03-01), Chiu et al.
patent: 6535076 (2003-03-01), Partridge et al.
patent: 6538603 (2003-03-01), Chen et al.
patent: 6556102 (2003-04-01), Sengupta et al.
patent: 6590468 (2003-07-01), du Toit et al.
patent: 6597265 (2003-07-01), Liang et al.
patent: 6696954 (2004-02-01), Chung
patent: 6888502 (2005-05-01), Beigel et al.
patent: 7009515 (2006-03-01), Carrender
patent: 2002/0067267 (2002-06-01), Kirkham
du Toit Cornelius
du Toit Nicolaas
Foo Bing
Kvarnstrand John
Mendolia Greg
Finn James S.
Mehmood Jennifer
Paratek Microwave Inc.
Wu Daniel
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