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1. 发明授权

US08154407B2 RFID device time synchronization from a public source 失效
标题翻译： RFID设备从公共源的时间同步
公开(公告)号：US08154407B2
公开(公告)日：2012-04-10
申请号：US13026826
申请日：2011-02-14
申请人： Roy Greeff , Freddie W. Smith , David K. Ovard
发明人： Roy Greeff , Freddie W. Smith , David K. Ovard
IPC分类号： G08B13/14
CPC分类号： G01D9/005 , G06K19/0716 , G06K19/07749
摘要： A radio frequency identification (RFID) device includes an antenna linked to a receiving circuit, the antenna tuned to receive a radio frequency (RF) time-code signal from a public source, a controller circuit and an internal clock linked to the receiving circuit, a microcontroller linked to the receiving circuit, a memory linked to the microcontroller, and a battery linked to and powering the receiving circuit, controller circuit, internal clock, microcontroller and memory.
摘要翻译：射频识别（RFID）设备包括链接到接收电路的天线，被调谐以从公共源接收射频（RF）时间码信号的天线，控制器电路和连接到接收电路的内部时钟，连接到接收电路的微控制器，连接到微控制器的存储器以及链接到接收电路，控制器电路，内部时钟，微控制器和存储器的电池的电池。

2. 发明授权

US07898390B2 Phase shifters, interrogators, methods of shifting a phase angle of a signal, and methods of operating an interrogator 有权
标题翻译：移相器，询问器，移位信号的相位角的方法以及操作询问器的方法
公开(公告)号：US07898390B2
公开(公告)日：2011-03-01
申请号：US11502999
申请日：2006-08-10
申请人： Roy Greeff , David K. Ovard
发明人： Roy Greeff , David K. Ovard
IPC分类号： H04Q5/22
CPC分类号： H04B1/525 , G01S13/751 , G06K7/0008 , G07C9/00309 , G07C2009/00373 , G07C2009/00793 , H04B5/0056
摘要： An interrogator provides a phase shifter including a first power divider configured to receive a signal and provide plural quadrature components of the signal; plural mixers coupled with the first power divider and configured to scale the quadrature components using a phase shift angle; and a second power divider coupled with the mixers and configured to combine the scaled quadrature components to shift the phase angle of the input signal by the phase shift angle.
摘要翻译：询问器提供一种移相器，包括：第一功率分配器，被配置为接收信号并提供信号的多个正交分量; 多个混频器，与第一功率分配器耦合并被配置为使用相移角缩放正交分量; 以及与所述混频器耦合并被配置为组合所述经比例缩放的正交分量以将所述输入信号的相位角移位所述相移角的第二功率分配器。

3. 发明申请

US20080180253A1 RFID Communication System and Method of Operation 审中-公开
标题翻译： RFID通信系统和操作方法
公开(公告)号：US20080180253A1
公开(公告)日：2008-07-31
申请号：US11781884
申请日：2007-07-23
申请人： David K. Ovard , Roy Greeff
发明人： David K. Ovard , Roy Greeff
IPC分类号： G06K7/00 , G08B13/14 , H04B7/22
CPC分类号： G06K7/10366 , G06K7/0008 , G06K19/0723 , H01Q1/2208 , H04B1/707 , H04B7/22 , H04J13/0022
摘要： A radio frequency identification (RFID) system enabling backscatter communication between a reader and a tag. A baseband data signal is encoded, and it may be selectively inverted and used to modulate a carrier using amplitude modulation, phase modulation, or both amplitude and phase modulation. A reply received from the tag in response to a command from the reader may include an identification code associated with an object to which the tag is affixed.
摘要翻译：一种射频识别（RFID）系统，可实现读写器与标签之间的反向散射通信。对基带数据信号进行编码，并且可以选择性地反转并用于使用幅度调制，相位调制或幅度和相位调制来调制载波。响应于来自读取器的命令从标签接收到的答复可以包括与标签所贴附的对象相关联的识别码。

4. 发明授权

US06603391B1 Phase shifters, interrogators, methods of shifting a phase angle of a signal, and methods of operating an interrogator 失效
标题翻译：移相器，询问器，移位信号的相位角的方法以及操作询问器的方法
公开(公告)号：US06603391B1
公开(公告)日：2003-08-05
申请号：US09265082
申请日：1999-03-09
申请人： Roy Greeff , David K. Ovard
发明人： Roy Greeff , David K. Ovard
IPC分类号： H04Q100
CPC分类号： H04B1/525 , G01S13/751 , G06K7/0008 , G07C9/00309 , G07C2009/00373 , G07C2009/00793 , H04B5/0056
摘要： The present invention includes phase shifters, interrogators, methods of shifting a phase angle of a signal, and methods of operating an interrogator. One aspect of the present invention provides a phase shifter including a first power divider configured to receive a signal and provide plural quadrature components of the signal; plural mixers coupled with the first power divider and configured to scale the quadrature components using a phase shift angle; and a second power divider coupled with the mixers and configured to combine the scaled quadrature components to shift the phase angle of the input signal by the phase shift angle.
摘要翻译：本发明包括移相器，询问器，移位信号的相位角的方法以及操作询问器的方法。本发明的一个方面提供了一种移相器，包括：第一功率分配器，被配置为接收信号并提供信号的多个正交分量; 多个混频器，与第一功率分配器耦合并被配置为使用相移角缩放正交分量; 以及与所述混频器耦合并被配置为组合所述经比例缩放的正交分量以将所述输入信号的相位角移位所述相移角的第二功率分配器。

5. 发明授权

US06356764B1 Wireless communication systems, interrogators and methods of communicating within a wireless communication system 有权
标题翻译：无线通信系统，询问器和无线通信系统内的通信方法
公开(公告)号：US06356764B1
公开(公告)日：2002-03-12
申请号：US09265074
申请日：1999-03-09
申请人： David K. Ovard , Roy Greeff
发明人： David K. Ovard , Roy Greeff
IPC分类号： H04Q720
CPC分类号： G06K7/01 , G06K7/0008 , G06K7/10356 , G06K17/0022 , H04W8/005 , H04W84/18
摘要： The present invention relates to wireless communication systems, interrogators and methods of communicating within a wireless communication system. One aspect of the present invention provides a wireless communication system including at least one remote communication device configured to communicate a return link wireless signal; an interrogator including: a communication station configured to receive the return link wireless signal and to generate a return link communication signal corresponding to the return link wireless signal; communication circuitry coupled with the communication station and configured to communicate the return link communication signal; and a housing remotely located with respect to the communication station and including circuitry configured to receive the return link communication signal from the communication circuitry and to process the return link communication signal.
摘要翻译：本发明涉及无线通信系统，询问器和在无线通信系统内进行通信的方法。本发明的一个方面提供了一种无线通信系统，包括至少一个被配置为传送返回链路无线信号的远程通信设备; 询问器，包括：通信站，被配置为接收所述返回链路无线信号并产生与所述返回链路无线信号相对应的返回链路通信信号; 通信电路与所述通信站耦合并且被配置为传送所述返回链路通信信号; 以及相对于所述通信站远程定位的外壳，并且包括被配置为从所述通信电路接收所述返回链路通信信号并且处理所述返回链路通信信号的电路的电路。

6. 发明授权

US06255993B1 Right and left hand circularly polarized RFID backscatter antenna 有权
标题翻译：左右圆偏振RFID反向散射天线
公开(公告)号：US06255993B1
公开(公告)日：2001-07-03
申请号：US09349615
申请日：1999-07-08
申请人： Roy Greeff , David K. Ovard , Dirgha Khatri
发明人： Roy Greeff , David K. Ovard , Dirgha Khatri
IPC分类号： H01Q302
CPC分类号： H01Q1/38
摘要： An antenna, system and method for transmitting and receiving RF signals over a first frequency band using a single antenna or two closely spaced antennas. In one embodiment, the antenna is configured to receive first signals in the first frequency band having a first rotational polarization and to transmit second signals in the first frequency band and having a second rotational polarization. The second signals may be transmitted in response to the first signals. The first signals may be preferentially routed to a receiver using signal conditioning circuitry that also routes the second signals from a transmitter to the antenna but not to the receiver.
摘要翻译：一种用于使用单个天线或两个紧密间隔的天线在第一频带上发送和接收RF信号的天线，系统和方法。在一个实施例中，天线被配置为接收具有第一旋转极化的第一频带中的第一信号并且在第一频带中传输第二信号并且具有第二旋转极化。可以响应于第一信号来发送第二信号。使用也将第二信号从发射机路由到天线而不是接收机的信号调节电路，可以将第一信号优先路由到接收机。

7. 发明申请

US20130069767A1 METHODS AND APPARATUS FOR RFID TAG COMMUNICATIONS 有权
标题翻译： RFID标签通信的方法和设备
公开(公告)号：US20130069767A1
公开(公告)日：2013-03-21
申请号：US13620243
申请日：2012-09-14
申请人： David K. Ovard , Roy Greeff
发明人： David K. Ovard , Roy Greeff
IPC分类号： G06K19/07
CPC分类号： G06K7/10366 , G06K7/0008 , G06K19/0723 , H01Q1/2208 , H04B1/707 , H04B7/22 , H04J13/0022
摘要： The present invention provides backscatter interrogators, communication systems and backscatter communication methods. According to one aspect of the present invention, a backscatter interrogator includes a data path configured to communicate a data signal; a signal generator configured to generate a carrier signal; and a modulator coupled with the data path and the signal generator, the modulator being configured to spread the data signal to define a spread data signal and amplitude modulate the carrier signal using the spread data signal, the modulator being further configured to phase modulate the carrier signal.
摘要翻译：本发明提供反向散射询问器，通信系统和后向散射通信方法。根据本发明的一个方面，反向散射询问器包括被配置为传送数据信号的数据路径; 信号发生器，被配置为产生载波信号; 以及与所述数据路径和所述信号发生器耦合的调制器，所述调制器被配置为扩展所述数据信号以限定扩展数据信号并且使用所述扩展数据信号对所述载波信号进行幅度调制，所述调制器还被配置为对所述载波进行相位调制信号。

8. 发明授权

US07982586B2 Wireless communication systems, interrogators and methods of communicating within a wireless communication system 失效
公开(公告)号：US07982586B2
公开(公告)日：2011-07-19
申请号：US11495845
申请日：2006-07-27
申请人： David K. Ovard , Roy Greeff
发明人： David K. Ovard , Roy Greeff
IPC分类号： H04Q5/22 , G05B19/00 , G06F7/00 , G08B5/00
CPC分类号： G06K7/0008
摘要： A wireless communication system includes an interrogator including a housing including circuitry configured to generate a forward link communication signal; communication circuitry configured to communicate the forward link communication signal; and a communication station remotely located with respect to the housing and configured to receive the forward link communication signal from the communication circuitry and to radiate a forward link wireless signal corresponding to the forward link communication signal; and at least one remote communication device configured to receive the forward link wireless signal. A method of communicating within a wireless communication system includes providing an interrogator and at least one remote communication device; generating a forward link communication signal using circuitry within a housing of the interrogator; communicating the forward link communication signal from the housing using communication circuitry; receiving the forward link communication signal from the communication circuitry within a communication station of the interrogator remotely located from the housing; radiating a forward link wireless signal corresponding to the forward link communication signal using the communication station; and receiving the forward link wireless signal within the at least one remote communication device.

9. 发明授权

US07091828B2 Interrogators, methods of operating a coherent interrogator, backscatter communication methods, interrogation methods, and signal processing methods 有权
标题翻译：询问器，操作相干询问器的方法，反向散射通信方法，询问方法和信号处理方法
公开(公告)号：US07091828B2
公开(公告)日：2006-08-15
申请号：US10633205
申请日：2003-08-01
申请人： Roy Greeff , David K. Ovard
发明人： Roy Greeff , David K. Ovard
IPC分类号： H04Q1/00
CPC分类号： H04B1/525 , G01S13/751 , G06K7/0008 , G07C9/00309 , G07C2009/00373 , G07C2009/00793 , H04B5/0056
摘要： The present invention includes phase shifters, interrogators, methods of shifting a phase angle of a signal, and methods of operating an interrogator. One aspect of the present invention provides a phase shifter including a first power divider configured to receive a signal and provide plural quadrature components of the signal; plural mixers coupled with the first power divider and configured to scale the quadrature components using a phase shift angle; and a second power divider coupled with the mixers and configured to combine the scaled quadrature components to shift the phase angle of the input signal by the phase shift angle.
摘要翻译：本发明包括移相器，询问器，移位信号的相位角的方法以及操作询问器的方法。本发明的一个方面提供了一种移相器，包括：第一功率分配器，被配置为接收信号并提供信号的多个正交分量; 多个混频器，与第一功率分配器耦合并被配置为使用相移角缩放正交分量; 以及与所述混频器耦合并被配置为组合所述经比例缩放的正交分量以将所述输入信号的相位角移位所述相移角的第二功率分配器。

10. 发明授权

US06459726B1 Backscatter interrogators, communication systems and backscatter communication methods 失效
标题翻译：反向散射询问器，通信系统和反向散射通信方法
公开(公告)号：US06459726B1
公开(公告)日：2002-10-01
申请号：US09066610
申请日：1998-04-24
申请人： David K. Ovard , Roy Greeff
发明人： David K. Ovard , Roy Greeff
IPC分类号： H04B138
CPC分类号： G06K7/10366 , G06K7/0008 , G06K19/0723 , H01Q1/2208 , H04B1/707 , H04B7/22 , H04J13/0022
摘要： The present invention provides backscatter interrogators, communication systems and backscatter communication methods. According to one aspect of the present invention, a backscatter interrogator includes a data path configured to communicate a data signal; a signal generator configured to generate a carrier signal; and a modulator coupled with the data path and the signal generator, the modulator being configured to spread the data signal to define a spread data signal and amplitude modulate the carrier signal using the spread data signal, the modulator being further configured to phase modulate the carrier signal.
摘要翻译：本发明提供反向散射询问器，通信系统和后向散射通信方法。根据本发明的一个方面，反向散射询问器包括被配置为传送数据信号的数据路径; 信号发生器，被配置为产生载波信号; 以及与所述数据路径和所述信号发生器耦合的调制器，所述调制器被配置为扩展所述数据信号以限定扩展数据信号并且使用所述扩展数据信号对所述载波信号进行幅度调制，所述调制器还被配置为对所述载波进行相位调制信号。

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