M-type hexaferrite antennas for use in wireless communication devices
    8.
    发明授权
    M-type hexaferrite antennas for use in wireless communication devices 有权
    用于无线通信设备的M型六边形天线

    公开(公告)号:US09397391B2

    公开(公告)日:2016-07-19

    申请号:US13885374

    申请日:2011-11-15

    摘要: An antenna is fabricated using an M-type hexaferrite, such as a tin (Sn) and zinc (Zn) substituted M-type strontium hexaferrite (Sn/Zn-substituted SrM: SrFe12−2xZnxSnxO19), thereby enabling antenna miniaturization, broad bandwidth, and high gain. In one embodiment, an antenna system has a substrate and a chip antenna formed on the substrate. The system also has a conductive radiator contacting the chip antenna, and the chip antenna comprises an M-type strontium hexaferrite for which Fe cations are substituted with tin (Sn) and zinc (Zn) to achieve soft magnetic properties for the antenna. Thus, the coercivity and permeability are lower and higher, respectively, than those of pure SrM. Such fabricated hexaferrite chip antennas have broadband characteristics and show good radiation performance at various frequencies, including in the GHz frequency range.

    摘要翻译: 使用诸如锡(Sn)和锌(Zn)取代的M型六方铁氧锶(Sn / Zn取代的SrM:SrFe12-2xZnxSnxO19)的M型六铁素制造天线,从而使天线小型化,宽带宽, 和高增益。 在一个实施例中,天线系统具有形成在基板上的基板和芯片天线。 该系统还具有与芯片天线接触的导电散热器,并且芯片天线包括M型六方铁氧体,其中Fe阳离子被锡(Sn)和锌(Zn)所取代,以获得天线的软磁特性。 因此,矫顽力和渗透率分别低于纯SrM的矫顽力和渗透率。 这种制造的六方铁芯片天线具有宽带特性,并且在各种频率(包括在GHz频率范围内)表现出良好的辐射性能。

    Multi-input and multi-output (MIMO) antenna system with absorbers for reducing interference
    10.
    发明授权
    Multi-input and multi-output (MIMO) antenna system with absorbers for reducing interference 有权
    多输入多输出(MIMO)天线系统,具有减少干扰的吸收器

    公开(公告)号:US09190723B1

    公开(公告)日:2015-11-17

    申请号:US13247515

    申请日:2011-09-28

    IPC分类号: H01Q1/52 H01Q21/28

    摘要: A Multi-Input-Multi-Output (MIMO) system has multiple radiation elements and absorbers disposed on a substrate. The absorbers are positioned about the radiation elements to reduce the interference between the radiation elements. Use of the absorbers permits interference levels comparable to conventional MIMO systems using spatial diversity without requiring the antennas to be separated by at least one-half of the wavelength of the communicated signals. A ground plane on the substrate is also positioned on the substrate to enhance antenna system performance.

    摘要翻译: 多输入多输出(MIMO)系统具有设置在基板上的多个辐射元件和吸收体。 吸收体围绕辐射元件定位以减小辐射元件之间的干扰。 吸收体的使用允许与使用空间分集的常规MIMO系统相当的干扰水平,而不需要将天线分离通信信号的波长的至少一半。 衬底上的接地平面也位于衬底上,以增强天线系统性能。