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    Sonic boom pressure wave simulation method and apparatus
    1.
    发明授权
    Sonic boom pressure wave simulation method and apparatus 失效

    公开(公告)号：US3555878A

    公开(公告)日：1971-01-19

    申请号：US3555878D

    申请日：1967-07-21

    申请人： GEN APPLIED SCIENCE LAB INC

    发明人： SLUTSKY SIMON ,  FERRI ANTONIO

    IPC分类号： G01M99/00 ,  G01M9/00

    CPC分类号： G01M99/00

    摘要： PRESSURE WAVES CLOSELY SIMULATING "SONIC BOOM" WAVES ARE PRODUCED BY REGULATING THE MASS FLOW RATE OF A GAS FROM A PRESSURIZED SOURCE IN ACCORDANCE WITH A MATHEMATICAL FUNCTION DERIVED FROM THE GENERAL FLOW EQUATIONS DESCRIBING THE GAS FLOW. THE RESULTING PRESSURE WAVES ARE TRANSMITTED TO A TEST STATION IN SUBSTANTIALLY SPHERICAL FORM BY MEANS OF A DIVERGING CONDUIT WHOSE WALLS ARE SUBSTANTIALLY STRAIGHT IN THE DIRECTION OF WAVE TRAVEL. IN ONE EMBODIMENT OF THE INVENTION, THE MASS FLOW RATE IS REGULATED IN ACCORDANCE WITH THE TIME-INTEGRAL OF THE PRESSURE WAVE DESIRED BY VARYING THE EXIT AREA OF A SONIC NOZZLE WHICH IS SUPPLIED WITH COMPRESSED GAS AT A SUPERCRITICAL PRESSURE. THE EFFECTS OF UNWANTED REFLECTED WAVES CAN BE ELIMINATED BY PROVIDING A VACUUM SOURCE IN COMBINATION WITH THE PRESSURE SOURCE. TRAVELLING PRESSURE WAVES CLOSELY SIMULATING TRAVELING SONIC BOOM WAVES ARE PRODUCED IN ALL EMBODIMENTS OF THE INVENTION.

    Microwave communication system for moving land vehicle
    2.
    发明授权
    Microwave communication system for moving land vehicle 失效
    用于移动车辆的微波通信系统

    公开(公告)号：US3609675A

    公开(公告)日：1971-09-28

    申请号：US3609675D

    申请日：1969-03-03

    申请人： GEN APPLIED SCIENCE LAB INC

    发明人： ABELE MANLIO G

    IPC分类号： H01P3/123 ,  H01P5/18 ,  H01Q13/10 ,  H01Q13/24 ,  H04B5/00 ,  H04B3/60

    CPC分类号： H01Q13/24 ,  H01P3/123 ,  H01P5/024 ,  H01P5/18 ,  H01Q1/3225

    摘要： The microwave communication system, in its preferred form, includes a stationary waveguide through which microwave energy flows in surface waves in the fundamental mode. The waveguide preferably is a semicylindrical dielectric rod with a metallic conducting shield on the flat surface of the rod, and with the remainder of the rod unshielded. An antenna having the same general guide configuration is positioned near the waveguide to transmit and receive communications to and from the waveguide. The antenna either is stationary or is mounted on a vehicle such as a railroad car and positioned so as to always be near the waveguide. One form of antenna actually comprises a novel directional coupler, and another is a resonant antenna. In the waveguide fabrication method, the pattern of the lines of force of the electrical field in an unshielded waveguide of a given shape is determined, and a plane perpendicular to the lines is located. A waveguide is formed with the original shape but cut away along the perpendicular plane. Then a conductive shield is located at the resulting surface.

    Microwave repeater
    4.
    发明授权
    Microwave repeater 失效
    MICROWAVE REPEATER

    公开(公告)号：US3675128A

    公开(公告)日：1972-07-04

    申请号：US3675128D

    申请日：1970-07-30

    申请人： GEN APPLIED SCIENCE LAB INC

    发明人： ABELE MANLIO G

    IPC分类号： H01Q1/32 ,  H04B5/00 ,  H04N3/36

    CPC分类号： H01Q1/3225

    摘要： A repeater for a stationary waveguide in a system for communicating between the waveguide and a moving vehicle such as a train. The stationary waveguide structure includes an inverted channel-shaped shield with a semi-cylindrical dielectric rod which acts as the waveguide. The shield protects the waveguide from ice, rain, birds and foreign objects, without itself interferring with the transmission of microwave energy through the waveguide. A coupler or antenna is attached to the moving vehicle and moves along underneath the stationary waveguide structure to couple signals between the vehicle and the stationary waveguide. The repeater comprises two short auxiliary sections of waveguides which are mounted parallel to the stationary waveguide, and a microwave amplifier. The first auxiliary waveguide removes a small portion of the signal flowing in the main waveguide and conducts that signal to the amplifier. The amplifier amplifies the signal and delivers it to the second waveguide which couples the energy back to the main waveguide in amplified form. By means of this repeater, the energy in the main waveguide is amplified substantially without interrupting the signal received by or transmitted by the moving vehicle.

    摘要翻译： 一种用于在波导和诸如火车的移动车辆之间通信的系统中的固定波导的中继器。 固定波导结构包括具有作为波导的半圆柱形介质棒的反向通道形屏蔽。 屏蔽保护波导免受冰，雨，鸟和异物的侵扰，而不会干扰通过波导传播微波能量。 耦合器或天线附接到移动的车辆并沿着固定波导结构下方移动以耦合车辆和固定波导之间的信号。 中继器包括平行于固定波导安装的两个短波导辅助部分和微波放大器。 第一辅助波导去除在主波导中流动的信号的一小部分，并将该信号传导到放大器。 放大器放大信号并将其传送到第二波导，其将能量以放大形式耦合回主波导。 通过该中继器，主波导中的能量基本上被放大，而不中断由移动车辆接收或由移动车辆传送的信号。