公开(公告)号：US5771021A

公开(公告)日：1998-06-23

申请号：US550628

申请日：1995-10-31

申请人： Richard L. Veghte ,  Curtis L. Carrender ,  Alfred R. Koelle ,  Jeremy A. Landt

发明人： Richard L. Veghte ,  Curtis L. Carrender ,  Alfred R. Koelle ,  Jeremy A. Landt

IPC分类号： G01S13/75 ,  G06K7/00 ,  G06K7/10 ,  G06K19/07 ,  H01Q1/24 ,  H01Q1/32 ,  H01Q1/38 ,  H01Q3/44 ,  H01Q3/46 ,  H01Q9/04 ,  H01Q21/29

CPC分类号： G06K19/07786 ,  G01S13/756 ,  G06K19/0723 ,  G06K7/0008 ,  G06K7/10316 ,  G06K7/10346 ,  H01Q1/247 ,  H01Q1/3233 ,  H01Q1/38 ,  H01Q21/29 ,  H01Q21/293 ,  H01Q3/44 ,  H01Q3/46 ,  H01Q9/0407 ,  H01Q9/0442

摘要： A reader interrogates a transponder attached to a remote object. The transponder includes a microstrip patch antenna having two segments connected together by a switch, each segment being one-half wavelength, the antenna being a full wavelength at the frequency of the interrogating signal. In response to a control signal, the switch is opened and closed, thereby coupling and decoupling the two segments of the microstrip antenna. When the switch is in the closed position, the two segments are out-of-phase with one another, thereby producing a maximum reflected signal. When the switch is in the open position, the two segments act in concert to produce a minimum backscattered signal. The backscatter signal is thus modulated in accordance with the control signal and is received at the reader where it is subsequently decoded to identify the remote object.

摘要翻译： 读者询问连接到远程对象的应答器。 应答器包括微带贴片天线，其具有通过开关连接在一起的两个段，每个段是二分之一波长，天线是在询问信号的频率处的全波长。 响应于控制信号，开关被打开和关闭，从而耦合和去耦微带天线的两个部分。 当开关处于闭合位置时，两个段彼此不相位，从而产生最大的反射信号。 当开关处于打开位置时，两个区段一致地产生最小反向散射信号。 后向散射信号因此根据控制信号进行调制，并在读取器处被接收，随后其被解码以识别远程对象。

公开(公告)号：US5825329A

公开(公告)日：1998-10-20

申请号：US687089

申请日：1996-07-23

申请人： Richard L. Veghte ,  Curtis L. Carrender

发明人： Richard L. Veghte ,  Curtis L. Carrender

IPC分类号： H01Q13/08 ,  G01S7/02 ,  G01S13/74 ,  G01S13/75 ,  G06K7/10 ,  G06K19/07 ,  H01Q1/32 ,  H01Q1/38 ,  H01Q3/44 ,  H01Q3/46 ,  H01Q9/04 ,  H01Q21/29

CPC分类号： G06K7/10346 ,  G01S13/756 ,  G06K19/0723 ,  G06K19/07786 ,  G06K7/10316 ,  H01Q1/3233 ,  H01Q1/38 ,  H01Q21/29 ,  H01Q21/293 ,  H01Q3/44 ,  H01Q3/46 ,  H01Q9/0407 ,  H01Q9/0442

摘要： The invention provides a microstrip patch antenna for emitting backscatter-modulated signals in response to a received signal. The antenna has two segments that are connected together by a switch. When the switch is ON, the antenna is a full wave length antenna with its two segments out-of-phase with each other, thus producing minimal backscatter. When the switch is OFF, the two segments of the antenna act in concert with each other to produce a backscatter-modulated signal. Multiple pairs of such antennas can be connected together to make a single antenna with increased signal power.

摘要翻译： 本发明提供一种微带贴片天线，用于响应于接收到的信号发射反向散射调制信号。 天线具有通过开关连接在一起的两个段。 当开关打开时，天线是一个全波长天线，其两个波段彼此不同相，从而产生最小的反向散射。 当开关关闭时，天线的两个部分相互协调工作，以产生反向散射调制信号。 可以将多对这样的天线连接在一起，以使具有增加的信号功率的单个天线。

公开(公告)号：US20120146769A1

公开(公告)日：2012-06-14

申请号：US13276222

申请日：2011-10-18

申请人： Curtis L. Carrender ,  Roger G. Stewart ,  John H. Rolin ,  Ronald Gilbert

发明人： Curtis L. Carrender ,  Roger G. Stewart ,  John H. Rolin ,  Ronald Gilbert

IPC分类号： G06K7/01 ,  G06K19/073

CPC分类号： G06K19/0723 ,  G06K7/10019 ,  G06K19/07381

摘要： The circuitry introduced in this invention selectively slows down the functioning of an electronic circuit maintaining a particular state for a prolonged period of time. This circuitry is used not only to achieve the desired effect in maintaining security from electronic thieves trying to circumvent codes but also in other applications such as enabling a circuit to continue to function in the event of a brief loss of power. For example, in an RFID system, if a reader is frequency hopping, a tag loses power for as long as about 400 milliseconds when the reader changes to other frequencies. In a preferred embodiment, the disclosed circuitry is used in conjunction with a destruct sequence.

摘要翻译： 在本发明中引入的电路选择性地减慢保持特定状态长时间的电子电路的功能。 该电路不仅用于在维护电子窃贼试图绕过代码的安全性方面实现期望的效果，而且在其他应用中，例如使电路在短暂的功率损失的情况下继续工作。 例如，在RFID系统中，如果读取器跳频，当读取器改变到其他频率时，标签失去长达约400毫秒的功率。 在优选实施例中，所公开的电路与破坏序列结合使用。

公开(公告)号：US07639119B2

公开(公告)日：2009-12-29

申请号：US11864112

申请日：2007-09-28

申请人： Curtis L. Carrender ,  Ronald W. Gilbert

发明人： Curtis L. Carrender ,  Ronald W. Gilbert

IPC分类号： H04Q5/22

CPC分类号： G06K17/0029 ,  G06K7/0008 ,  G06K19/0723 ,  G06K2017/0051

摘要： A system and method of inventorying multiple objects utilizing a multi-level or a chained radio frequency identification system. The system includes a master tag and a plurality of upper level tags and lower level tags associated with respective objects. The upper and lower level tags communicate with each other and the master tag so that reading of the master tag reveals the presence and absence of upper and lower level tags. In the chained RF system, the upper and lower level tags communicate locally with each other in a manner so that more remote tags that are out of range of some of the upper and lower level tags have their information relayed through adjacent tags to the master tag and thence to a controller.

摘要翻译： 使用多级或链式射频识别系统对多个物体进行盘点的系统和方法。 该系统包括主标签和与相应对象相关联的多个上级标签和下级标签。 上层和下层标签相互通信和主标签，使得主标签的读取显示上下标签的存在和不存在。 在链式RF系统中，上级和下级标签之间以本地方式进行通信，使得超出某些上级和低级标签范围的更远的标签将其信息通过相邻标签中继到主标签 然后到控制器。

公开(公告)号：US20070192315A1

公开(公告)日：2007-08-16

申请号：US11706046

申请日：2007-02-12

申请人： Paul S. Drzaic ,  Curtis L. Carrender ,  Raj Bridgelall ,  John Price

发明人： Paul S. Drzaic ,  Curtis L. Carrender ,  Raj Bridgelall ,  John Price

IPC分类号： G06F17/30

CPC分类号： G06F16/242 ,  G06F16/24575

摘要： Methods and apparatuses for extracting information from a database based on tag data are provided. One method includes interrogating a plurality of RFID tags coupled with objects within in an area to obtain tag data. The contextual environment of the area is determined based on the tag data. A search of a database relating to an item in the area is conducted. Relevance rankings of search results are adjusted based upon the determined contextual environment. Search results can be displayed in order of relevance rankings.

摘要翻译： 提供了基于标签数据从数据库提取信息的方法和装置。 一种方法包括询问与区域内的对象耦合的多个RFID标签以获得标签数据。 该区域的上下文环境基于标签数据确定。 进行与该区域中的项目有关的数据库的搜索。 搜索结果的相关性排名根据确定的情境环境进行调整。 搜索结果可以按照相关性排名的顺序显示。

公开(公告)号：US10917744B2

公开(公告)日：2021-02-09

申请号：US16140216

申请日：2018-09-24

申请人： David G. Brice ,  Curtis L. Carrender

发明人： David G. Brice ,  Curtis L. Carrender

IPC分类号： G08B21/02 ,  G08B6/00 ,  H04W4/80 ,  G08B3/10 ,  H04W4/02

摘要： A system for locating remote objects and for directing users to remote objects, and for tracking remote objects such as eye glasses, watches, and the like, the system including an RFID transponder physically connected to the object, and RFID interrogator configured to interrogate the RFID transponder and receive a signal in response thereto, and a portable electronic device in electronic communication with the RFID interrogator and configured to process the received signal and determine a location of the object relative to the RFID interrogator and to provide information to a user regarding the location of the object.

公开(公告)号：US08768952B2

公开(公告)日：2014-07-01

申请号：US12772922

申请日：2010-05-03

申请人： John Stephen Smith ,  Curtis L. Carrender

发明人： John Stephen Smith ,  Curtis L. Carrender

IPC分类号： G06F17/30

CPC分类号： G06K7/10009 ,  G06K7/0008 ,  Y10S707/99931 ,  Y10S707/99933 ,  Y10S707/99945

摘要： Embodiments of the present invention include systems with Readers and Tags in which a Reader queries the Tags with a parameter that includes a level of probability of reply according to which the Tags individually and randomly decide whether or not to reply. In one embodiment, the Tags can switch between two states: A and B. The query command also specifies a state (A or B) so that only the Tags in the specified state can reply. After successfully sending the Tag identification data from a Tag to the Reader, the Tag switches to the other state from the specified state. In one embodiment, the operations about the two states are symmetric. In one embodiment, the Tags can remember the parameters used in a query so that a short form of query command can be used to repeat the query with the same query parameters.

摘要翻译： 本发明的实施例包括具有读取器和标签的系统，其中读者使用包括答复概率级别的参数来查询标签，根据该级别，标签单独并随机地决定是否回复。 在一个实施例中，标签可以在两个状态之间切换：A和B.查询命令还指定状态（A或B），使得仅指定状态的标签可以回复。 标签识别数据从标签成功发送到读卡器后，标签将从指定状态切换到其他状态。 在一个实施例中，关于两个状态的操作是对称的。 在一个实施例中，标签可以记住在查询中使用的参数，使得可以使用简短形式的查询命令来重复具有相同查询参数的查询。

公开(公告)号：US07716160B2

公开(公告)日：2010-05-11

申请号：US10982557

申请日：2004-11-05

申请人： John Stephen Smith ,  Curtis L. Carrender

发明人： John Stephen Smith ,  Curtis L. Carrender

IPC分类号： G06F17/30

CPC分类号： G06K7/10009 ,  G06K7/0008 ,  Y10S707/99931 ,  Y10S707/99933 ,  Y10S707/99945

摘要： Embodiments of the present invention include systems with Readers and Tags in which a Reader queries the Tags with a parameter that includes a level of probability of reply according to which the Tags individually and randomly decide whether or not to reply. In one embodiment, the Tags can switch between two states: A and B. The query command also specifies a state (A or B) so that only the Tags in the specified state can reply. After successfully sending the Tag identification data from a Tag to the Reader, the Tag switches to the other state from the specified state. In one embodiment, the operations about the two states are symmetric. In one embodiment, the Tags can remember the parameters used in a query so that a short form of query command can be used to repeat the query with the same query parameters.

摘要翻译： 本发明的实施例包括具有读取器和标签的系统，其中读者使用包括答复概率级别的参数来查询标签，根据该级别，标签单独并随机地决定是否回复。 在一个实施例中，标签可以在两个状态之间切换：A和B.查询命令还指定状态（A或B），使得仅指定状态的标签可以回复。 标签识别数据从标签成功发送到读卡器后，标签将从指定状态切换到其他状态。 在一个实施例中，关于两个状态的操作是对称的。 在一个实施例中，标签可以记住在查询中使用的参数，使得可以使用简短形式的查询命令来重复具有相同查询参数的查询。

公开(公告)号：US07562083B2

公开(公告)日：2009-07-14

申请号：US11271628

申请日：2005-11-09

申请人： John Stephen Smith ,  Curtis L. Carrender

发明人： John Stephen Smith ,  Curtis L. Carrender

IPC分类号： G06F7/00 ,  G06F17/30

CPC分类号： G06K7/10009 ,  G06K7/0008 ,  Y10S707/99931 ,  Y10S707/99933 ,  Y10S707/99945

摘要： Methods and Apparatuses for RFID with Huffman encoded commands are provided. Each command of a plurality of commands is Huffman encoded. A rarely used command of the plurality of commands has more command bits than another command of the plurality of commands. The plurality of commands includes QueryA, QueryB, QueryRep, ACK, and NAK.

摘要翻译： 提供了具有霍夫曼编码命令的RFID方法和装置。 多个命令的每个命令是霍夫曼编码的。 多个命令的很少使用的命令比多个命令中的另一个命令具有更多的命令位。 多个命令包括QueryA，QueryB，QueryRep，ACK和NAK。

公开(公告)号：US07554451B2

公开(公告)日：2009-06-30

申请号：US11828322

申请日：2007-07-25

申请人： Curtis L. Carrender ,  John Michael Price

发明人： Curtis L. Carrender ,  John Michael Price

IPC分类号： G08B13/14

CPC分类号： G06K7/10356 ,  G06K7/10346 ,  H01Q1/2216 ,  H01Q3/24 ,  H01Q3/44

摘要： Methods and apparatuses for configuring antennae of radio frequency identification reader systems. In one aspect of an embodiment, a radio frequency identification (RFID) reader system, includes: a receiver; a radio frequency (RF) source for signal transmission; and a switch matrix coupled with the receiver and the radio frequency sources to selectively couple the receiver and the radio frequency source to a plurality of non-collocated antennae. When in a first mode, the switch matrix connects the radio frequency source to a first one of the antennae for signal transmission and the receiver to a second one of the antennae for signal reception; and when in a second mode, the switch matrix connects the first one of the antennae for signal reception and, in one example, the second one or another one of the antennae to the RF source for signal transmission.

摘要翻译： 用于配置射频识别读取器系统的天线的方法和装置。 在一个实施例的一个方面，射频识别（RFID）读取器系统包括：接收器; 用于信号传输的射频（RF）源; 以及与接收器和射频源耦合的开关矩阵，以将接收器和射频源选择性地耦合到多个非并置的天线。 当处于第一模式时，开关矩阵将射频源连接到用于信号传输的天线中的第一个天线，并将接收机连接到用于信号接收的第二天线; 并且当处于第二模式时，开关矩阵连接用于信号接收的天线中的第一个天线，并且在一个示例中将天线中的第二个或另一个连接到RF源以用于信号传输。