公开(公告)号：US20090153319A1

公开(公告)日：2009-06-18

申请号：US11957050

申请日：2007-12-14

Applicant: Mark Duran ,  Richard T. Knadle, JR. ,  Russell Calvarese

Inventor： Mark Duran ,  Richard T. Knadle, JR. ,  Russell Calvarese

IPC: G08B26/00

CPC classification number: G06K7/0008

Abstract: Due to design constraints and installation variability, RFID interrogator antennas do not always function optimally across the entire channel on which they are intended to operate due to diminished antenna bandwidth. Techniques are described for selecting a sub-band of frequencies within the channel on which a particular RFID interrogator can be operated to enhance operating efficiency. These techniques include a VSWR measurement technique and a read/no read technique are disclosed for identifying a useful sub-band of frequencies. The operation of a reader/interrogator is then limited to an identified sub-band so that an RFID interrogator/tag system can be operated efficiently.

Abstract translation: 由于设计限制和安装变异性，由于天线带宽减小，RFID询问器天线并不总是在整个通道上运行的最佳功能。 描述了用于选择频道内可以操作特定RFID询问器以提高操作效率的频道的子频带的技术。 这些技术包括VSWR测量技术，并且公开了用于识别有用子频带的读/无读技术。 然后，读取器/询问器的操作被限制到所识别的子带，使得可以有效地操作RFID​​询问器/标签系统。

公开(公告)号：US20190070472A1

公开(公告)日：2019-03-07

申请号：US16114856

申请日：2018-08-28

Applicant: Mark Duran

Inventor： Mark Duran

IPC: A63B60/60 ,  A63B71/00

Abstract: A portable stand having retractable arms extending from vertically-extending central trunk is described. The arms when deployed are at least slightly upwardly angled so that a baseball player can slide his glove, his hat and his batting helmet there over to store them when not in use. Typically, enough arms are provided along the trunk to permit an entire team to store their equipment on the stand with each player having his own arm to use. In variations, a topper is provided that has outwardly extending arms and spaced fingers that permit baseball bats to be hung there from. Variations can be used to store player equipment from other sports.