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    • 2. 发明申请
    • ELECTRONICALLY TUNABLE RF FRONT END MODULE
    • 电子控制RF前端模块
    • WO2004073100A2
    • 2004-08-26
    • PCT/US2004/003522
    • 2004-02-05
    • KHOSRO, ShamsaifarOM, Gupta
    • KHOSRO, ShamsaifarOM, Gupta
    • H01P
    • H01P1/15H01P1/213H04B1/18
    • An electronically tunable RF Front End Module, comprising a first tunable bandpass filter, said first tunable bandpass filter capable of being tuned to receive a plurality of distinct frequency bands, a first lowpass filter capable of transmitting predetermined frequency bands, a first switch in communication with said first lowpass filter and said first tunable bandpass filter for switching between said first tunable bandpass filter and said first low pass filter to enable switching between transmitting and reception of RF signals, a second tunable bandpass filter, said second tunable bandpass filter capable of being tuned to receive a plurality of distinct frequency bands, a second lowpass filter capable of transmitting predetermined frequency bands, a second switch in communication with said second lowpass filter and said second tunable bandpass filter for switching between said second tunable bandpass filter and said second low pass filter to enable switching between transmitting and reception of RF signals, and an antenna in communication with a third switch, said third switch enabling switching between said first and said second switch. More specifically, first tunable bandpass filter that is capable of being tuned to receive a plurality of distinct frequency bands can be tuned to receive frequencies in the DCS and PCS bands. Also, the first lowpass filter capable of transmitting predetermined frequency bands, can transmit signals in the DCS and PCS frequency bands; and the second tunable bandpass filter is capable of being tuned to receive frequencies in the GSM 800 and GSM 900 bands.
    • 一种电子可调RF前端模块,包括第一可调谐带通滤波器,所述第一可调谐带通滤波器能够被调谐以接收多个不同的频带,能够发射预定频带的第一低通滤波器,与 所述第一低通滤波器和所述第一可调带通滤波器,用于在所述第一可调谐带通滤波器和所述第一低通滤波器之间切换,以实现RF信号的发射和接收之间的切换,第二可调谐带通滤波器,所述第二可调谐带通滤波器能够被调谐 以接收多个不同的频带,能够发送预定频带的第二低通滤波器,与所述第二低通滤波器通信的第二开关和所述第二可调谐带通滤波器,用于在所述第二可调谐带通滤波器和所述第二低通滤波器之间切换 以实现传输之间的切换 接收RF信号,以及与第三开关通信的天线,所述第三开关能够在所述第一和所述第二开关之间切换。 更具体地,可以调谐能够被调谐以接收多个不同频带的第一可调谐带通滤波器以接收DCS和PCS频带中的频率。 此外,能够发送预定频带的第一低通滤波器可以在DCS和PCS频带中发送信号; 并且第二可调谐带通滤波器能够被调谐以接收GSM 800和GSM 900频带中的频率。
    • 3. 发明申请
    • ELECTRONICALLY TUNABLE RF FRONT END MODULE
    • 电子控制RF前端模块
    • WO2004073100A3
    • 2005-11-10
    • PCT/US2004003522
    • 2004-02-05
    • KHOSRO SHAMSAIFAROM GUPTA
    • KHOSRO SHAMSAIFAROM GUPTA
    • H01P1/15H01P1/213H04B1/18H04B1/40H04B1/44H04B1/46H04M1/00
    • H01P1/15H01P1/213H04B1/18
    • An electronically tunable RF Front End Module, comprising a first tunable bandpass filter, said first tunable bandpass filter capable of being tuned to receive a plurality of distinct frequency bands, a first lowpass filter capable of transmitting predetermined frequency bands, a first switch (225) in communication with said first lowpass filter and said first tunable bandpass filter for switching between said first tunable bandpass filter and said first low pass filter to enable switching between transmitting and reception of RF signals, a second tunable bandpass filter, said second tunable bandpass filter capable of being tuned to receive a plurality of distinct frequency bands, a second lowpass filter capable of transmitting predetermined frequency bands, a second switch (240) in communication with said second lowpass filter and said second tunable bandpass filter for switching between said second tunable bandpass filter and said second low pass filter to enable switching between transmitting and reception of RF signals, and an antenna in communication with a third switch, said third switch enabling switching between said first and said second switch.
    • 一种电子可调谐RF前端模块,包括第一可调谐带通滤波器,所述第一可调谐带通滤波器能够被调谐以接收多个不同的频带,能够发射预定频带的第一低通滤波器,第一开关(225) 与所述第一低通滤波器和所述第一可调谐带通滤波器通信,用于在所述第一可调谐带通滤波器和所述第一低通滤波器之间切换以实现RF信号的发射和接收之间的切换,第二可调谐带通滤波器,所述第二可调谐带通滤波器能够 被调谐以接收多个不同的频带,能够发送预定频带的第二低通滤波器,与所述第二低通滤波器通信的第二开关(240)和所述第二可调谐带通滤波器,用于在所述第二可调谐带通滤波器 并且所述第二低通滤波器能够在tr之间切换 RF信号的接收和接收,以及与第三开关通信的天线,所述第三开关能够在所述第一和所述第二开关之间进行切换。
    • 6. 发明授权
    • RF ID tag reader utilizing a scanning antenna system and method
    • RF ID标签阅读器,利用扫描天线系统和方法
    • US07496329B2
    • 2009-02-24
    • US10716147
    • 2004-05-17
    • Jay PatelOm GuptaShuguan ChenJames S. Finn
    • Jay PatelOm GuptaShuguan ChenJames S. Finn
    • H04B5/00H04Q5/22
    • G01S5/04G01S5/12G01S13/878G06K7/10346H01Q1/42H01Q3/36H01Q3/446H01Q9/0407H01Q21/205H01Q25/00
    • An RF ID tag system and method that utilizes an RF ID tag and an RF ID tag reader which incorporates a dynamically reconfigurable wireless antenna and/or an array antenna and/or a switched polarization antenna. The dynamically reconfigurable wireless antenna embodiment comprises at least one multi-layered RF module, said at least one RF module further comprising at least one RF connector for receipt of at least one RF signal and at least one layer of tunable dielectric material and one layer of metal fabricated into said RF module; an RF motherboard for acceptance of RF signals and distribution of the transmit energy to said RF module at the appropriate phases to generate a beam in the commanded direction and width; and a controller for determining the correct voltage signal to send to said at least one multi-layered RF module.
    • RF ID标签系统和方法,其利用RF ID标签和RF ID标签读取器,其结合动态可重新配置的无线天线和/或阵列天线和/或切换的极化天线。 动态可重配置无线天线实施例包括至少一个多层RF模块,所述至少一个RF模块还包括至少一个RF连接器,用于接收至少一个RF信号和至少一层可调电介质材料和一层 金属制成所述RF模块; 用于接收RF信号的RF母板和在适当的相位向所述RF模块分配发射能量以在指令的方向和宽度上产生光束; 以及用于确定要发送到所述至少一个多层RF模块的正确电压信号的控制器。
    • 8. 发明申请
    • RF ID tag reader utlizing a scanning antenna system and method
    • RF ID标签阅读器利用扫描天线系统和方法
    • US20050113138A1
    • 2005-05-26
    • US10858016
    • 2004-06-01
    • Greg MendoliaOm GuptaCornelis du Toit
    • Greg MendoliaOm GuptaCornelis du Toit
    • G06K7/08G06K7/10H01Q1/42H01Q3/36H01Q9/04H01Q21/20H01Q25/00H04M1/00G08B13/14H04B1/38
    • G01S5/04G01S5/12G01S13/878G06K7/10079G06K7/10336G06K7/10346H01Q1/42H01Q3/36H01Q9/0407H01Q21/205H01Q25/00
    • An RF ID card reader, comprising, RF ID circuitry to generate an RF ID signal, a transceiver in communication with the RF ID circuitry, and an antenna associated with the transceiver for scanning an area for at least one tag and establishing communication with the at least one tag, the antenna capable of creating a plurality of field focuses. Further, the RF ID card reader of the present invention may provide that the plurality of field focuses may be a near field focus and a far field focuse. Also, the field focuses may be created by a scanning antenna array. An embodiment of the present invention may also include at least one conducting curtain associated with the card reader, wherein the at least one conducting curtain may be capable of enhancing reception of the RF signals by reflecting RF signals in the area. An embodiment may also provide for at least one element and at least one phase shifter in the scanning antenna array be capable of being used as a multiple input and multiple output (MIMO) system to maximize information extracted from the RF signals.
    • 一种RF ID读卡器,包括用于产生RF ID信号的RF ID电路,与RF ID电路通信的收发器,以及与收发器相关联的天线,用于扫描至少一个标签的区域并建立与该位置的通信 至少一个标签,能够创建多个场焦点的天线。 此外,本发明的RF ID读卡器可以提供多个场聚焦可以是近场聚焦和远场聚焦。 此外,场聚焦可以由扫描天线阵列产生。 本发明的实施例还可以包括与读卡器相关联的至少一个导电帘幕,其中所述至少一个导电帘幕可以通过在该区域中反射RF信号来增强对RF信号的接收。 实施例还可以提供至少一个元件,并且扫描天线阵列中的至少一个移相器能够被用作多输入和多输出(MIMO)系统以最大化从RF信号提取的信息。