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1. 发明申请

US20080242754A1 LOW LOSS FOAM COMPOSITION AND CABLE HAVING LOW LOSS FOAM LAYER 审中-公开
标题翻译：低损失泡沫组合物和电缆具有低损耗泡沫层
公开(公告)号：US20080242754A1
公开(公告)日：2008-10-02
申请号：US12136582
申请日：2008-06-10
申请人： Michael F. Champagne , Richard Gendron , Caroline Vachon , Vijay K. Chopra , Hugh R. Nudd , Sitaram Rampalli
发明人： Michael F. Champagne , Richard Gendron , Caroline Vachon , Vijay K. Chopra , Hugh R. Nudd , Sitaram Rampalli
IPC分类号： C08J9/228 , C08J9/00 , B29C45/03
CPC分类号： C08J9/127 , C08J2203/06 , C08J2203/142 , C08J2323/02 , C08L23/06 , C08L23/0815 , C08L23/10 , C08L2203/14 , C08L2666/06
摘要： The invention relates to a low loss foam composition and cable, such as a coaxial cable. The foam composition is formed by heating an olefinic polymer, such as a high density polyethylene, medium density polyethylene, low density polyethylene, linear low density polyethylene, polypropylene, or a combination thereof, into a molten state composition, optionally with a nucleating agent. The molten mixture is extruded under pressure through a die with a blowing agent comprising an atmospheric gas, such as carbon dioxide, nitrogen or air, and a co-blowing agent selected from hydrofluorocarbons, hydrochlorofluorocarbons, or perfluoro compounds, such as HFC-134a. The cable is formed by extruding the foam composition onto a signal carrying conductor and sheathing the foam-coated signal carrying conductor in an appropriate conducting shield.
摘要翻译：本发明涉及低损耗泡沫组合物和电缆，例如同轴电缆。泡沫组合物通过加热烯烃聚合物如高密度聚乙烯，中密度聚乙烯，低密度聚乙烯，线性低密度聚乙烯，聚丙烯或其组合形成，可任选地与成核剂一起加入到熔融组合物中。熔融混合物在压力下通过包含大气气体如二氧化碳，氮气或空气的发泡剂和选自氢氟碳化合物，氢氯氟烃或全氟化合物如HFC-134a的共发泡剂在模具中挤出。电缆通过将泡沫组合物挤出到信号承载导体上并将泡沫涂覆的信号承载导体覆盖在适当的导电屏蔽中而形成。

2. 发明授权

US4800351A Radiating coaxial cable with improved flame retardancy 失效
标题翻译：具有改善阻燃性的辐射同轴电缆
公开(公告)号：US4800351A
公开(公告)日：1989-01-24
申请号：US95015
申请日：1987-09-10
申请人： Sitaram Rampalli , Hugh R. Nudd
发明人： Sitaram Rampalli , Hugh R. Nudd
IPC分类号： H01B11/18 , H01Q13/20 , H01P3/06 , H01Q13/00
CPC分类号： H01Q13/203
摘要： A radiating cable of the foam dielectric type is provided with increased flame-retardant capabilities by provision of an inert barrier tape between an apertured, corrugated outer conductor and the external jacket surrounding the conductor. The barrier tape is composed of non-halogenated, self-extinguishing insulating material and is wrapped over the outer conductor in such a way as to completely cover the radiating apertures disposed thereupon. The barrier tape prevents the melting and bubbling of the dielectric foam outwardly through the radiating slots into penetrating contact with the external jacket when the cable is subjected to high-intensity flames, without significantly affecting the transmission characteristics of the cable.

3. 发明授权

US4910998A Fluid detection system and method having a coaxial cable with solid, stranded dielectric elements 失效
标题翻译：流体检测系统和方法具有同轴电缆，具有固体，绞合介质元件
公开(公告)号：US4910998A
公开(公告)日：1990-03-27
申请号：US45887
申请日：1987-05-01
申请人： Frank R. Willis , Sitaram Rampalli , Vijay K. Chopra , Robert D. Perelman
发明人： Frank R. Willis , Sitaram Rampalli , Vijay K. Chopra , Robert D. Perelman
IPC分类号： G01N27/02 , G01M3/04 , G01M3/16 , G01N27/07
CPC分类号： G01M3/045 , G01M3/165
摘要： A fluid detection system includes a cable which is capable of being dried easily after coming into contact with the fluid being detected and displays a measurable change in characteristic impedance immediately upon contact with the fluid. The cable comprises an inner conductor and a cylindrical outer conductor disposed in a substantially parallel and coaxial relationship with each other with a dielectric detection layer coaxially disposed between the inner and outer conductors. The outer conductor is of an open braided construction which permits easy passage therethrough of the fluid to be detected. The detection layer comprises a pair of solid dielectric elements stranded around the inner conductor in a double helical configuration and defining an air gap between the two conductors which is adapted to retain the fluid so as to measurably change the characteristic impedance of the cable. A coating of dielectric material is provided around the solid inner conductor, the thickness of which can be controlled to adjust the change in characteristic impedance resulting from the presence of fluid within the dielectric layer. The improved cable construction allows the dielectric layer to be dried quickly even after the cable has been immersed in the fluid so that successive fluid detection measurements may be made without delay.

4. 发明授权

US5422614A Radiating coaxial cable for plenum applications 失效
标题翻译：用于集气室应用的辐射同轴电缆
公开(公告)号：US5422614A
公开(公告)日：1995-06-06
申请号：US023611
申请日：1993-02-26
申请人： Sitaram Rampalli , Leonard J. Visser
发明人： Sitaram Rampalli , Leonard J. Visser
IPC分类号： H01B7/295 , H01Q13/20 , H01P3/02 , H01Q13/22
CPC分类号： H01Q13/203 , H01B7/295
摘要： A radiating air-dielectric coaxial cable for plenum applications comprises an inner conductor; a non-halogenated dielectric spacer around the inner conductor; and a single, continuous, outer conductor surrounding the dielectric spacer in direct contact therewith. The outer conductor has apertures along its length for the passage of electromagnetic radiation. At least one layer of inert, flame-retardant barrier tape is wrapped over the outer surface of the outer conductor so as to cover each of the radiating apertures of said outer conductor to prevent the dielectric spacer from flowing out through the radiating apertures when the dielectric material is melted. A jacket of halogenated, highly flame-retardant polymer is extruded over the wrapped layer of barrier tape.
摘要翻译：用于增压室应用的辐射式空气 - 电介质同轴电缆包括内部导体; 围绕内部导体的非卤化电介质隔离物; 以及包围与其直接接触的电介质间隔物的单个连续外导体。外导体沿其长度具有用于电磁辐射通过的孔。至少一层惰性的阻燃阻挡带缠绕在外部导体的外表面上，以覆盖所述外部导体的每个辐射孔，以防止电介质隔离物通过辐射孔流出，当电介质材料熔化卤化的，高阻燃聚合物的外套被挤压在包裹的隔离带层上。

5. 发明授权

US5354217A Lightweight connector for a coaxial cable 失效
标题翻译：用于同轴电缆的轻型连接器
公开(公告)号：US5354217A
公开(公告)日：1994-10-11
申请号：US71762
申请日：1993-06-10
申请人： Lee R. Gabel , Sitaram Rampalli , James A. Wu
发明人： Lee R. Gabel , Sitaram Rampalli , James A. Wu
IPC分类号： H01R24/56 , H01R17/04
CPC分类号： H01R24/564 , H01R2103/00
摘要： A connector assembly for a coaxial cable having an outer conductor and an inner conductor includes a center conductor. A flaring ring and a clamping member are disposed adjacent to each other, and the outer conductor of the coaxial cable is engaged between the back end of the ring and the end of the clamping member. A body member holds the flaring ring and the clamping member together with the outer conductor of the cable located therebetween. A coupling nut, secured to the body member and disposed around the center conductor, is used to engage the connector with a mating connector. A conductive insert positioned within the body member provides electrical contact between the flaring ring and a mating connector. The connector assembly further includes a dielectric insulator, disposed between the center conductor and the conductive insert, for centering the center conductor with respect to the conductive insert and for electrically isolating the center conductor from the conductive insert. The clamping member, the body member, and the coupling nut are fabricated from polymeric materials, and the conductive insert is fabricated from an electrically conductive material.
摘要翻译：用于具有外部导体和内部导体的同轴电缆的连接器组件包括中心导体。扩口环和夹紧构件彼此相邻设置，同轴电缆的外导体接合在环的后端和夹紧构件的端部之间。主体部件与位于其间的电缆的外导体一起保持扩口环和夹紧构件。用于将连接器与配合连接器接合的固定在本体构件上且围绕中心导体设置的联接螺母。定位在主体构件内的导电插件提供了扩口环与配合连接器之间的电接触。连接器组件还包括设置在中心导体和导电插入件之间的电介质绝缘体，用于使中心导体相对于导电插入件居中，并且用于将中心导体与导电插入件电隔离。夹紧构件，主体构件和联接螺母由聚合材料制成，并且导电插入件由导电材料制成。

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