发明授权
- 专利标题: Systems and methods of beamforming in radio frequency identification applications
- 专利标题(中): 射频识别应用中波束成形的系统和方法
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申请号: US11702980申请日: 2007-02-05
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公开(公告)号: US07652577B1公开(公告)日: 2010-01-26
- 发明人: Upamanyu Madhow , Ben J. Wild , Kannan Ramchandran
- 申请人: Upamanyu Madhow , Ben J. Wild , Kannan Ramchandran
- 申请人地址: US NJ Thorofare
- 专利权人: Checkpoint Systems, Inc.
- 当前专利权人: Checkpoint Systems, Inc.
- 当前专利权人地址: US NJ Thorofare
- 代理机构: Caesar, Rivise, Bernstein, Cohen & Pokotilow, Ltd.
- 主分类号: G08B13/14
- IPC分类号: G08B13/14
摘要:
Systems and methods for beamforming in radio frequency identification (RFID) applications are disclosed. A beamforming system uses a distributed architecture and techniques for antenna beamforming using a feedback control loop to direct radio frequency (RF) energy onto a specific region, referred to as an interrogation zone, which includes a calibration node where one or more RFID tags may be located. The distributed architecture of the beamforming system is resistant to fading and shadowing effects, providing accurate RFID reader operation even in environments with multi-path reflections or environmental changes, such as people moving around or changes in the location of equipment.
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