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    • 4. 发明授权
    • Four-port patch antenna
    • 四端口贴片天线
    • US06549166B2
    • 2003-04-15
    • US09935471
    • 2001-08-22
    • Arun BhattacharyyaAlan ChaJames McKay
    • Arun BhattacharyyaAlan ChaJames McKay
    • H01Q138
    • H01Q21/065H01Q9/0435H01Q9/0457
    • A patch antenna is disclosed having four ports for circular polarization that suppress the TM-02 mode, resulting in a radiation pattern that is symmetric. The axial ratio performance is consequently superior to that of two-port patch antennas. A four-port patch antenna includes a patch made of an electrically conductive material, a patch substrate coupled to the patch wherein the patch substrate is made of a dielectric material, a ground plane coupled to the patch substrate wherein the ground plane is made of an electrically conductive material having at least four slots formed therein, a feed substrate coupled to the ground plane wherein the feed substrate is made of a dielectric material, and a hybrid network coupled to the feed substrate that includes a right hand circularly polarized port, a left hand circularly polarized port, and two matched terminated ports.
    • 公开了一种贴片天线,其具有用于圆偏振的四个端口,其抑制TM-02模式,导致对称的辐射图。 因此,轴比性能优于双端口贴片天线。 四端口贴片天线包括由导电材料制成的贴片,耦合到贴片的贴片衬底,其中贴片衬底由电介质材料制成,接地平面耦合到贴片衬底,其中接地面由 具有形成在其中的至少四个槽的导电材料,耦合到接地平面的进料基板,其中进料基板由介电材料制成,以及耦合到馈电基板的混合网络,其包括右手圆极化端口,左 手圆极化端口和两个匹配的终端端口。
    • 5. 发明申请
    • ROTATING DRILLING STABILIZER
    • 旋转钻井稳定器
    • US20140251692A1
    • 2014-09-11
    • US13792532
    • 2013-03-11
    • James McKay
    • James McKay
    • E21B17/10E21B7/28E21B10/26
    • E21B17/1078
    • A stabilizer and method for use in a wellbore are disclosed. The apparatus can include a rotary body disposed about a tubular and configured to rotate and axially-translate with respect to the tubular. The apparatus can also include a first anti-rotation device disposed axially adjacent the rotary body and configured to resist rotation and axial translation with respect to the tubular. The rotary body can be configured to engage the first anti-rotation device and rotationally lock therewith. The apparatus can also include a biasing member configured to bias apart the rotary body and the first anti-rotation device.
    • 公开了用于井眼的稳定剂和方法。 该装置可以包括围绕管状物设置的旋转体,并且构造成相对于管状物旋转并轴向平移。 该装置还可以包括第一防旋转装置,该第一防旋转装置轴向地邻近旋转体设置并且构造成抵抗相对于管状物的旋转和轴向平移。 旋转体可以构造成接合第一防旋转装置并与其旋转地锁定。 该装置还可以包括偏置构件,其构造成偏置分离旋转体和第一防旋转装置。