Bi-polar amplifier with sharply defined amplitude limits
    2.
    发明授权
    Bi-polar amplifier with sharply defined amplitude limits 失效
    具有限定幅度限制的双极放大器

    公开(公告)号:US4095126A

    公开(公告)日:1978-06-13

    申请号:US777990

    申请日:1977-03-16

    IPC分类号: H03G11/00 H03K5/08

    CPC分类号: H03G11/00

    摘要: The invention covers an amplifier circuit in which the output is limited in either polarity. Normally, a part of the output voltage is fed back to the input to maintain linearity but when the output reaches a maximum or minimum value, any further departure is amplified and fed back to the input circuit to neutralize the part of input signals which is outside of the range to be amplified. The feedback amplifier can be designed to initiate limiting at any desired output voltages and the positive and negative output limit voltages can be asymmetric with respect to the quiescent output voltage.

    High gain broadband planar antenna
    3.
    发明授权
    High gain broadband planar antenna 失效
    高增益宽带平面天线

    公开(公告)号:US5777583A

    公开(公告)日:1998-07-07

    申请号:US428977

    申请日:1995-04-26

    IPC分类号: H01Q1/38 H01Q9/04

    CPC分类号: H01Q9/0407 H01Q9/0442

    摘要: The antenna is a hybrid microstrip and reflector antenna having a planar patch antenna mounted to an upper surface of an insulated planar substrate. The substrate is coupled to a ground plane by one or more insulated couplers so as to form an airgap therebetween. A coaxial cable connectable to a transceiver is coupled to the bottom surface of the ground plane at the outer conductor thereof and the inner conductor is coupled to a feed pin which passes through the ground plane and protrudes through the surface of the patch. The feed pin is secured to the patch by soldering.

    摘要翻译: 天线是具有安装在绝缘平面基板的上表面上的平面贴片天线的混合微带线和反射器天线。 衬底通过一个或多个绝缘耦合器耦合到接地平面,以便在它们之间形成气隙。 可连接到收发器的同轴电缆在其外部导体处耦合到接地平面的底表面,并且内部导体耦合到穿过接地平面并通过贴片表面突出的馈电销。 进料销通过焊接固定在贴片上。