Radio-frequency and microwave load comprising a carbon-bonded carbon
fiber composite
    1.
    发明授权
    Radio-frequency and microwave load comprising a carbon-bonded carbon fiber composite 失效
    包含碳键碳纤维复合材料的射频和微波载荷

    公开(公告)号:US5742211A

    公开(公告)日:1998-04-21

    申请号:US620616

    申请日:1996-03-22

    IPC分类号: H01P1/22 H01P1/26

    CPC分类号: H01P1/22 H01P1/26

    摘要: A billet of low-density carbon-bonded carbon fiber (CBCF) composite is machined into a desired attenuator or load element shape (usually tapering). The CBCF composite is used as a free-standing load element or, preferably, brazed to the copper, brass or aluminum components of coaxial transmission lines or microwave waveguides. A novel braze method was developed for the brazing step. The resulting attenuator and/or load devices are robust, relatively inexpensive, more easily fabricated, and have improved performance over conventional graded-coating loads.

    摘要翻译: 将低密度碳键合碳纤维(CBCF)复合材料的坯料加工成所需的衰减器或负载元件形状(通常是锥形的)。 CBCF复合材料用作独立的负载元件,或者优选地钎焊到同轴传输线或微波波导的铜,黄铜或铝组件。 开发了用于钎焊步骤的新型钎焊方法。 所得到的衰减器和/或负载装置是鲁棒的,相对便宜的,更容易制造的,并且具有比常规分级涂层负载更好的性能。

    Microwave thawing apparatus and method
    6.
    发明授权
    Microwave thawing apparatus and method 失效
    微波解冻装置及方法

    公开(公告)号:US06744027B2

    公开(公告)日:2004-06-01

    申请号:US10120860

    申请日:2002-04-11

    IPC分类号: H05B680

    CPC分类号: H05B6/666 H05B6/782

    摘要: An apparatus for thawing a frozen material includes: a microwave energy source; a microwave applicator which defines a cavity for applying microwave energy from the microwave source to a material to be thawed; and a shielded region which is shielded from the microwave source, the shielded region in fluid communication with the cavity so that thawed material may flow from the cavity into the shielded region.

    摘要翻译: 用于解冻冷冻材料的装置包括:微波能量源; 微波施加器,其限定用于将微波能量从微波源施加到要解冻的材料的空腔; 以及与所述微波源屏蔽的屏蔽区域,所述屏蔽区域与所述空腔流体连通,使得解冻的材料可以从所述空腔流入所述屏蔽区域。

    Gelcasting methods
    8.
    发明授权
    Gelcasting methods 失效
    凝胶浇注方法

    公开(公告)号:US6066279A

    公开(公告)日:2000-05-23

    申请号:US135500

    申请日:1998-08-17

    摘要: A method of gelcasting includes the steps of providing a solution of at least hydroxymethylacrylamide (HMAM) and water. At least one inorganic powder is added to the mixture. At least one initiator system is provided to polymerize the HMAM. The initiator polymerizes the HMAM and water, to form a firm hydrogel that contains the inorganic powder. One or more comonomers can be polymerized with the HMAM monomer, to alter the final properties of the gelcast material. Additionally, one or more additives can be included in the polymerization mixture, to alter the properties of the gelcast material.

    摘要翻译: 凝胶注射的方法包括提供至少羟甲基丙烯酰胺(HMAM)和水的溶液的步骤。 向混合物中加入至少一种无机粉末。 提供至少一个引发剂体系来聚合HMAM。 引发剂聚合HMAM和水,形成含有无机粉末的坚固的水凝胶。 一种或多种共聚单体可以与HMAM单体聚合,以改变凝胶塑料的最终性能。 此外,聚合混合物中可以包括一种或多种添加剂,以改变凝胶状材料的性质。