公开(公告)号：JPH10224262A

公开(公告)日：1998-08-21

申请号：JP35439497

申请日：1997-12-24

Applicant: LUCENT TECHNOLOGIES INC

Inventor： SHOBER R ANTHONY ,  SWEETMAN ERIC ,  WRIGHT GREGORY ALAN

IPC: H04B5/02 ,  G01S13/75 ,  G06K19/07 ,  H04B1/59 ,  H04B7/26

Abstract: PROBLEM TO BE SOLVED: To provide design of a comparatively inexpensive tag for radio- frequency identification(RFID) system application, in which high sensitivity and a wide effective range are not so much of important. SOLUTION: RFID tag design using an inexpensive back scattering modulator is provided. The modulator is a simple CMOS gate 202 that is driven by a shift register 203, including a modulation signal. The CMOS gate is connected to an antenna 201 so as to modulate a reflectance of an antenna according to the modulation signal. In the 2nd embodiment, a tag is contained in a single CMOS integrated circuit, including all configuration elements required, to realize an inexpensive read-only RFID tag, except for the antenna.

公开(公告)号：JPH10224144A

公开(公告)日：1998-08-21

申请号：JP34620497

申请日：1997-12-16

Applicant: LUCENT TECHNOLOGIES INC

Inventor： SHOBER R ANTHONY ,  SWEETMAN ERIC ,  YOU-SAN WU

IPC: G06K17/00 ,  G07B15/02 ,  H01P5/12 ,  H01P5/22 ,  H01Q1/22 ,  H01Q9/18 ,  H01Q13/08 ,  H01Q21/06 ,  H01Q21/08 ,  H04B1/59 ,  H04B5/00

Abstract: PROBLEM TO BE SOLVED: To provide transmitting and receiving antennas which are small, light-weight and also inexpensive, and provide a beam width that is suitable for use. SOLUTION: This antenna system is suitable for an application in which a RFID tag passes near an interrogator. A single flat planar antenna 410 is used for transmission, and a multi-element flat planar antenna array 460 is used for receiving. In the multi-element flat planar antenna array, each element 420 to 450 is placed at intervals that are separated by 10.16cm for center to center interval and decides receiving beam width of narrow 30 degrees on a horizontal flat plane. A vertical receiving band width is far larger than 30 degrees and facilitates an interrogator in receiving signals at various heights.

公开(公告)号：CA2219099C

公开(公告)日：2002-04-16

申请号：CA2219099

申请日：1997-10-23

Applicant: LUCENT TECHNOLOGIES INC

Inventor： SWEETMAN ERIC ,  WU YOU-SUN ,  SHOBER R ANTHONY

IPC: G06K17/00 ,  G07B15/02 ,  H01P5/12 ,  H01P5/22 ,  H01Q1/22 ,  H01Q9/18 ,  H01Q13/08 ,  H01Q21/06 ,  H01Q21/08 ,  H04B1/59 ,  H04B5/00 ,  G01S13/74

Abstract: In accordance with the present invention, a general antenna system is disclosed suitable for applications in which an RFID Tag passes by an Interr ogator. We then disclose a specific antenna design that uses a single planar antenna fortransmit and a multi-element planar antenna array fo r receive. The multi-elementplanar antenna array is spaced such that each of the planar elements is four inches apart, center-to-center, thus defining a narrow 30.degree. receive beamwidth in the horizontal plane. The vertical receive bandwidth is much greater than 30.deg ree., facilitating the Interrogator receiving signals at a variety of elevations. Furthermore, a multi-way microstrip combiner is used to sum the signals received from each of the pla nar antenna. To block interference from the transmit antenna and to improve rec eivesensitivity, this multi-way microstrip combiner is s hielded using, in one embodiment, copper tape along its edges. In a specific embodiment, a four element receiv e antenna design is disclosed.

公开(公告)号：DE69720170T2

公开(公告)日：2003-12-18

申请号：DE69720170

申请日：1997-12-16

Applicant: LUCENT TECHNOLOGIES INC

Inventor： SHOBER ANTHONY R ,  WRIGHT GREGORY ALAN ,  SWEETMAN ERIC

IPC: H04B5/02 ,  G01S13/75 ,  G06K19/07 ,  H04B1/59 ,  H04B7/26

Abstract: The present invention provides for an inexpensive RFID Tag design which uses an inexpensive Backscatter Modulator. The modulator is simply a CMOS gate (202) driven by a shift register (203) containing a modulating signal. The CMOS gate is connected to the antenna (201) such that it modulates the reflectivity of the antenna in accordance with the modulating signal. In a second embodiment, the Tag is incorporated into a single CMOS integrated circuit which comprises all of the components, except for the antenna, necessary to implement an inexpensive read-only RFID Tag.

公开(公告)号：CA2222320A1

公开(公告)日：1998-06-30

申请号：CA2222320

申请日：1997-11-25

Applicant: LUCENT TECHNOLOGIES INC

Inventor： WRIGHT GREGORY ALAN ,  SHOBER R ANTHONY ,  SWEETMAN ERIC

IPC: H04B5/02 ,  G01S13/75 ,  G06K19/07 ,  H04B1/59 ,  H04B7/26 ,  G01V15/00 ,  H04B7/145 ,  H04B7/22 ,  G01S13/74

Abstract: The present invention provides for an inexpensive RFID Tag design which uses an inexpensive Backscatter Modulator. The modulator is simply a CMOS gate driven by a shift register containing a modulating signal. The CMOS gate is connected to the antenna such that it modulates the reflectivity of the antenna in accordance with the modulating signal. In a second embodiment, the Tag is incorporated into a single CMOS integrated circuit which comprises all of the components, except for the antenna, necessary to implement an inexpensive read-o nly RFID Tag.

公开(公告)号：DE69720170D1

公开(公告)日：2003-04-30

申请号：DE69720170

申请日：1997-12-16

Applicant: LUCENT TECHNOLOGIES INC

Inventor： SHOBER ANTHONY R ,  WRIGHT GREGORY ALAN ,  SWEETMAN ERIC

IPC: H04B5/02 ,  G01S13/75 ,  G06K19/07 ,  H04B1/59 ,  H04B7/26

Abstract: The present invention provides for an inexpensive RFID Tag design which uses an inexpensive Backscatter Modulator. The modulator is simply a CMOS gate (202) driven by a shift register (203) containing a modulating signal. The CMOS gate is connected to the antenna (201) such that it modulates the reflectivity of the antenna in accordance with the modulating signal. In a second embodiment, the Tag is incorporated into a single CMOS integrated circuit which comprises all of the components, except for the antenna, necessary to implement an inexpensive read-only RFID Tag.

公开(公告)号：CA2219099A1

公开(公告)日：1998-06-30

申请号：CA2219099

申请日：1997-10-23

Applicant: LUCENT TECHNOLOGIES INC

Inventor： SWEETMAN ERIC ,  WU YOU-SUN ,  SHOBER R ANTHONY

IPC: G06K17/00 ,  G07B15/02 ,  H01P5/12 ,  H01P5/22 ,  H01Q1/22 ,  H01Q9/18 ,  H01Q13/08 ,  H01Q21/06 ,  H01Q21/08 ,  H04B1/59 ,  H04B5/00 ,  G01S13/74

Abstract: In accordance with the present invention, a general antenna system is disclosed suitable for applications in which an RFID Tag passes by an Interrogat or. We then disclose a specific antenna design that uses a single planar antenna for transmit and a multi-element planar antenna array for receive. The multi-element planar antenna array is spaced such that each of the planar elements is four inc hes apart, center-to-center, thus defining a narrow 30.degree. receive beamwidth in the horizontal plane. The vertical receive bandwidth is much greater than 30.degree. , facilitating the Interrogator receiving signals at a variety of elevations. Furthermore, a mu lti-way microstrip combiner is used to sum the signals received from each of the planar antenna. To block interference from the transmit antenna and to improve receive sensitivity, this multi-way microstrip combiner is shielded using, in one embodi ment, copper tape along its edges. In a specific embodiment, a four element receive an tenna design is disclosed.