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    • 51. 发明授权
    • Process for preparation of aromatic compounds
    • 芳香族化合物的制备方法
    • US06274770B1
    • 2001-08-14
    • US09380598
    • 1999-09-13
    • James Hanley ClarkDavid Adams
    • James Hanley ClarkDavid Adams
    • C07C4525
    • C07C201/12C07C45/36C07C49/813C07C49/83C07C205/45
    • There is disclosed a process for the preparation of a compound of general formula (I), wherein Y and Z each independently represent a fluorine atom or a hydroxy group, and a, b, c and d independently represent 0, 1, 2 or 3 provided that the sum of a, b, c, and d is 1, 2, 3 or 4; the process comprising treating a compound of general formula (II), wherein a, b, c, and d are as described above and L1 and L2 each independently represent an active group provided that either Y and L1 are different or Z and L2 are different, with a fluorinating system in the presence of oxygen. A preferred compound of general formula (I) is 4,4′-difluorobenzophenone which may be prepared from 4,4′-dinitrophenylmethane using tetramethylammonium fluoride.
    • 公开了通式(I)的化合物的制备方法,其中Y和Z各自独立地表示氟原子或羟基,a,b,c和d独立地表示0,1,2或3 条件是a,b,c和d的和为1,2,3或4; 所述方法包括处理通式(II)的化合物,其中a,b,c和d如上所述,且L 1和L 2各自独立地表示活性基团,条件是Y和L 1不同或Z和L2不同 ,在氧气存在下使用氟化体系。 优选的通式(I)化合物是4,4'-二氟二苯甲酮,其可以使用四甲基氟化铵由4,4'-二硝基苯基甲烷制备。
    • 53. 发明授权
    • Home appliance with support assembly
    • 家用电器配有支架
    • US08757565B2
    • 2014-06-24
    • US13479357
    • 2012-05-24
    • David AdamsMichael Rutherford
    • David AdamsMichael Rutherford
    • F16M11/24
    • F24C15/086
    • A floor-standing home appliance in the nature of a range including an appliance body and a support assembly for supporting the appliance body on a support surface, the support assembly including a support member extending away from the appliance body, the support member having an engagement member with a predetermined shape at a distal end thereof, and a shoe attached to the distal end of the support member, the shoe having a receiving well with a shape complimentary to the predetermined shape of the engagement member to receive the engagement member in the receiving well.
    • 一种落地家用电器,其范围包括器具主体和用于将器具本体支撑在支撑表面上的支撑组件,支撑组件包括远离器具本体延伸的支撑构件,支撑构件具有接合 在其远端具有预定形状的构件和附接到支撑构件的远端的鞋,该鞋具有接收孔,该接收孔具有与接合构件的预定形状互补的形状,以在接收部中接收接合构件 好。
    • 57. 发明申请
    • Multibeam Antenna System
    • 多波束天线系统
    • US20100046421A1
    • 2010-02-25
    • US11967428
    • 2007-12-31
    • David Adams
    • David Adams
    • H04B7/185
    • H04B7/0617H04B7/0452H04B7/086H04B7/10
    • Embodiments of the invention relate to beamforming antennas such as can be used in space division multiplexing systems. Space division multiplexing can be used to increase data capacity in wireless networks by enabling different base stations to transmit signals within the same frequency band. Each antenna beam can potentially be used to establish a communication link within an area of wireless coverage, and other communication links established on other antenna beams then represent interference to that user. In order to reduce interference, narrow beamwidths are desirable. These are typically achieved by increasing the aperture of the antenna in the azimuth plane, and in arrangements that require finely divided angular sectors, a greater number of antennas will be required to give three hundred and sixty degree coverage. As a result, there is potentially a large increase in the total surface area of antennas which is undesirable, as it leads to increased wind loading of an antenna tower. Embodiments of the invention provide an arrangement in which data are transmitted from a first transmitter to a first receiver using a first antenna beam, and data are transmitted from a second transmitter to a second receiver using a second antenna beam. The first antenna beam is formed by splitting the signal from the first transmitter into two parts with a first phase relationship between the parts, each part being connected to an antenna. A second antenna beam is formed by splitting the signal from the second transmitter into two parts with a second phase relationship between the parts, each part being connected to one of the two antennas. An advantage of embodiments of the invention is that data can be transmitted from different transmitters at the same frequency without interference, while presenting a smaller antenna aperture than is required with conventional systems.
    • 本发明的实施例涉及诸如可以在空分复用系统中使用的波束形成天线。 空分复用可用于通过使不同的基站在相同频带内传输信号来增加无线网络中的数据容量。 每个天线波束可以潜在地用于在无线覆盖区域内建立通信链路,并且在其他天线波束上建立的其它通信链路表示对该用户的干扰。 为了减少干扰,窄波束宽度是理想的。 这些通常通过在方位平面中增加天线的孔径来实现,并且在需要细分角度扇区的布置中,将需要更多数量的天线来给出三百六十度的覆盖。 结果,天线的总表面积可能会大幅增加,这是不期望的,因为它导致天线塔的风荷载增加。 本发明的实施例提供了一种使用第一天线波束将数据从第一发射机发射到第一接收机的装置,并且使用第二天线波束将数据从第二发射机发射到第二接收机。 第一天线波束通过将来自第一发射机的信号分成两部分而形成,其中部分之间具有第一相位关系,每个部分连接到天线。 第二天线波束通过将来自第二发射机的信号分成两部分而形成,其中部分之间具有第二相位关系,每个部分连接到两个天线之一。 本发明的实施例的优点在于,数据可以在不受干扰的情况下以相同的频率从不同的发射机传输,同时呈现比常规系统所需的更小的天线孔径。