Replaceable card for antenna frequency tuning

    公开(公告)号:US10749243B2

    公开(公告)日:2020-08-18

    申请号:US16172908

    申请日:2018-10-29

    Abstract: An improved antenna configuration for a communication device is provided that enables ultra wideband operation. The antenna may be formed of two sections, a primary section built into the communication device and a replaceable secondary section disposed on a data card. The primary section is common for all frequency bands of operation which the antenna is intended to cover. The replaceable secondary section is unique to predetermined frequency bands and provides tuning for the overall antenna. A data card tray antenna configuration is also provided which is suitable for a stand-alone antenna or as part of a sectional antenna.

    ELECTROMAGNETIC INTERFERENCE SHIELDING ASSEMBLY AND METHOD OF PROVIDING ELECTROMAGNETIC INTERFERENCE SHIELDING

    公开(公告)号:US20170135199A1

    公开(公告)日:2017-05-11

    申请号:US14936082

    申请日:2015-11-09

    Abstract: An assembly and method provides improved electromagnetic interference shielding, particularly where the assembly includes a shield with a shield opening. The shield opening may be provided to permit the escape of thermal energy from an electronic component on a substrate under the shield or to receive at least a part of a thermal pad, electronic component, or conductive chassis. The assembly includes a first conductive gasket disposed around the shield opening, and a second conductive gasket disposed radially outward from the first conductive gasket. The first conductive gasket and the second conductive gasket have one or more gasket characteristics including a respective first characteristic and second characteristic that are of the same type but have different values. The first characteristic and the second characteristic may be one or more of different attenuation frequency ranges, compression amounts, compressive forces, and dimensions.

    Methods and apparatus for detecting faults in a siren-based alert system

    公开(公告)号:US10930122B1

    公开(公告)日:2021-02-23

    申请号:US16567685

    申请日:2019-09-11

    Abstract: Methods for detecting faults in a siren-based alert system include receiving, by a siren device from a central siren controller, an activation command. The activation command identifies a neighbor siren device that is to be activated. Audible alerts output by the neighbor siren device include a unique identifying characteristic associated with the neighbor siren device. The method includes determining that the unique identifying characteristic is not detectable by the siren device and, in response, taking corrective action. The corrective action includes the siren device sending a siren fault notification to the central siren controller indicating a failure to detect the unique identifying characteristic and may also include modifying the audible alert output by the siren device to compensate for the faulty siren device. The siren device may send a siren fault notification to the central siren controller if an unexpected audible alert, such as a potential false alarm, is detected.

    METHODS AND APPARATUS FOR DETECTING FAULTS IN A SIREN-BASED ALERT SYSTEM

    公开(公告)号:US20210074132A1

    公开(公告)日:2021-03-11

    申请号:US16567685

    申请日:2019-09-11

    Abstract: Methods for detecting faults in a siren-based alert system include receiving, by a siren device from a central siren controller, an activation command. The activation command identifies a neighbor siren device that is to be activated. Audible alerts output by the neighbor siren device include a unique identifying characteristic associated with the neighbor siren device. The method includes determining that the unique identifying characteristic is not detectable by the siren device and, in response, taking corrective action. The corrective action includes the siren device sending a siren fault notification to the central siren controller indicating a failure to detect the unique identifying characteristic and may also include modifying the audible alert output by the siren device to compensate for the faulty siren device. The siren device may send a siren fault notification to the central siren controller if an unexpected audible alert, such as a potential false alarm, is detected.

    Electromagnetic interference shielding assembly and method of providing electromagnetic interference shielding

    公开(公告)号:US09788413B2

    公开(公告)日:2017-10-10

    申请号:US14936082

    申请日:2015-11-09

    Abstract: An assembly and method provides improved electromagnetic interference shielding, particularly where the assembly includes a shield with a shield opening. The shield opening may be provided to permit the escape of thermal energy from an electronic component on a substrate under the shield or to receive at least a part of a thermal pad, electronic component, or conductive chassis. The assembly includes a first conductive gasket disposed around the shield opening, and a second conductive gasket disposed radially outward from the first conductive gasket. The first conductive gasket and the second conductive gasket have one or more gasket characteristics including a respective first characteristic and second characteristic that are of the same type but have different values. The first characteristic and the second characteristic may be one or more of different attenuation frequency ranges, compression amounts, compressive forces, and dimensions.

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