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    • 1. 发明申请
    • AN ANTENNA DIELECTRIC
    • 天线电介质
    • WO1997049536A1
    • 1997-12-31
    • PCT/GB1997001697
    • 1997-06-25
    • NORTHERN TELECOM LIMITEDMcKINNON, John, Peter, BruceARNOLD, Mark, HanleyMcALINDEN, Michael, John
    • NORTHERN TELECOM LIMITED
    • B29C44/10
    • H01Q9/285B29C44/10
    • Many types of antenna comprise a ground plane spaced apart from a dielectric film or sheet which supports a microstrip pattern comprising printed patch radiating elements by a dielectric spacer, such as flat plate antennas (otherwise known as layered antennas). For modern telecommunications applications various factors need to be taken into account, such as size, weight, cost and ease of construction of the antenna. At high frequencies, e.g. above 100 MHz, circuit losses increase as the frequencies increase due to, inter alia, dielectric spacing. The present invention provides an antenna dielectric having a thickness of less than 3 mm, having a relative dielectric permitivity approaching that of air whereby circuit and transmission line losses are minimised. In accordance with another aspect of the invention, there is provided an antenna ground plane substrate comprising an expanded polystyrene substrate produced by a two-stage moulding process. Introducing the pre-expanded beads into a two-position mould cavity in a first position dimensioned to enable a uniform distribution of beads; reducing the size of the cavity passing steam through the mould whereby the polystyrene beads further expand; reducing the pressure within the mould to a partial vacuum whereby the polystyrene cools and assumes a solid state and the moisture due to the steam is removed; and removing the substrate from the mould and heating the substrate at a temperature above ambient in dry air. The two-stage polystyrene is coated with a conductive coating to provide a conductive surface of uniform smoothness and of light weight.
    • 许多类型的天线包括与电介质膜或片间隔开的接地平面,其通过诸如平板天线(也称为分层天线)的电介质间隔件支撑包括印刷贴片辐射元件的微带图案。 对于现代电信应用,需要考虑各种因素,例如尺寸,重量,成本和易于构造的天线。 在高频下,例如 高于100MHz时,电路损耗随着频率的增加而增加,尤其是介质间距。 本发明提供一种厚度小于3mm的天线电介质,具有接近空气的相对电介质介电常数,从而使电路和传输线损耗最小化。 根据本发明的另一方面,提供了一种天线接地平面基板,其包括通过两阶段成型工艺制造的发泡聚苯乙烯基板。 将预发泡的珠粒引入到位于第一位置的两位置模具腔中,其尺寸被设计成能够均匀分布珠子; 减小通过模具的空气通过的空腔的尺寸,由此聚苯乙烯珠进一步膨胀; 将模具内的压力降低至部分真空度,由此聚苯乙烯冷却并呈现固体状态,并且除去蒸汽所引起的水分; 并从模具中取出基材并在干燥空气中在高于环境温度的温度下加热基材。 两级聚苯乙烯涂覆导电涂层,以提供均匀平滑度和重量轻的导电表面。
    • 8. 发明申请
    • On-screen intelligent electronic program guide
    • 屏幕智能电子节目指南
    • US20060117337A1
    • 2006-06-01
    • US11267681
    • 2005-11-04
    • Vishnu Shivaji RaoMark HanleyGary Feather
    • Vishnu Shivaji RaoMark HanleyGary Feather
    • H04N7/16
    • H04N5/44543H04N21/4312H04N21/482H04N21/84
    • An intelligent, interactively maneuverable interface display of current electronic programming guide (EPG) textual information presentable on a user's television screen. The display, which is organized as a context display, includes keyword-sensitized text, and a virtual, user-employable navigation tool, such as a scrollbar tool, which, via a hand-held remote control device, enables a user quickly, intuitively, and with appropriate user-specific focus to locate programming material of special interest. Display information which is thus accessed by user manipulation of this tool is arranged in a sensible hierarchical manner so as to define different levels of focus-resolution which relate to different “positions” of a handle in the scrollbar tool.
    • 当前电子节目指南(EPG)的文本信息的智能交互式可操作界面显示,可在用户的电视屏幕上呈现。 被组织为上下文显示的显示器包括关键字敏感的文本以及虚拟的,用户可使用的导航工具,例如滚动工具,其通过手持遥控设备快速,直观地实现用户 并具有适当的用户特定重点,以定位特别感兴趣的编程材料。 通过用户操纵该工具进行访问的显示信息以明智的分级方式布置,以便定义与滚动条工具中的句柄的不同“位置”有关的不同级别的焦点分辨率。