Invention Grant
US08590790B1 Method and apparatus for generating dedicated data channels in backscatter RFID systems
有权
用于在反向散射RFID系统中产生专用数据通道的方法和装置
- Patent Title: Method and apparatus for generating dedicated data channels in backscatter RFID systems
- Patent Title (中): 用于在反向散射RFID系统中产生专用数据通道的方法和装置
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Application No.: US13470709Application Date: 2012-05-14
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Publication No.: US08590790B1Publication Date: 2013-11-26
- Inventor: Tajinder Manku
- Applicant: Tajinder Manku
- Applicant Address: CA Waterloo
- Assignee: Tag-Comm Inc.
- Current Assignee: Tag-Comm Inc.
- Current Assignee Address: CA Waterloo
- Agency: Gowling Lafleur Henderson LLP
- Main IPC: H04B1/59
- IPC: H04B1/59
Abstract:
An antenna apparatus for backscattering an incoming radio frequency (RF) signal includes an antenna for backscattering the incoming RF signal in accordance with a reflection coefficient characteristic of the antenna. A variable impedance circuit includes an output electrically connected to the antenna. A low pass delta sigma modulator is coupled to the variable impedance circuit and digitally controls the output of the variable impedance circuit, such that the reflection coefficient of the antenna is adjusted based on the output of the variable impedance circuit.
Public/Granted literature
- US20130299579A1 METHOD AND APPARATUS FOR GENERATING DEDICATED DATA CHANNELS IN BACKSCATTER RFID SYSTEMS Public/Granted day:2013-11-14
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