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1. 发明授权

US4608572A Broad-band antenna structure having frequency-independent, low-loss ground plane 失效
标题翻译：宽带天线结构具有频率独立，低损耗的接地层
公开(公告)号：US4608572A
公开(公告)日：1986-08-26
申请号：US448511
申请日：1982-12-10
申请人： Thomas L. Blakney , Douglas D. Connell , Bernard J. Lamberty , James R. Lee
发明人： Thomas L. Blakney , Douglas D. Connell , Bernard J. Lamberty , James R. Lee
IPC分类号： H01Q5/00 , H01Q5/28 , H01Q9/27 , H01Q9/28 , H01Q1/48 , H01Q1/36
CPC分类号： H01Q11/10 , H01Q1/48 , H01Q5/28 , H01Q9/27 , H01Q9/28
摘要： To optimize antenna bandwidth and efficiency in broad-band antenna elements of the planar, multiarm spiral and log periodic types, a conically shaped ground plane characterized by progressively sized circumferential chokes, is arranged on a common axis with the axial center of the spiral or log periodic elements so that the electrical spacing between the excited regions of the log periodic of spiral elements and the ground plane maintains a constant one-quarter wavelength relationship. The progressively sized circumferential chokes on the ground plane cut off the flow of excessive radial currents along the ground plane surface to achieve an improved mix of excitation and reexcitation modes. In one embodiment, the circumferential chokes on the conical ground plane are partially shunted by shunting strips that electrically or capacitively bridge the choke walls to reestablish limited radial currents along the ground plane for sustaining certain desirable antenna modes. In another disclosed embodiment, the equivalent one-quarter wavelength relationship between the driven spiral or log elements and the reflecting ground plane is maintained in an antenna structure in which the driven elements are disposed on the surface of a dielectrically shaped cone and the ground plane and progressively sized circumferential chokes are arranged in a generally planar array. In still another disclosed embodiment, the circumferential, progressively sized chokes are disposed on the interior reflective surface of a center-fed antenna horn, wherein the array of chokes has the effect of broad-banding the otherwise inherently narrow band characteristics of the horn.
摘要翻译：为了优化平面，多臂螺旋和对数周期类型的宽带天线元件中的天线带宽和效率，以逐渐大小的圆周扼流圈为特征的圆锥形接地平面布置在与螺旋或对数轴的中心的公共轴上使得螺旋元件的对数周期性的激发区域和接地平面之间的电气间隔保持恒定的四分之一波长关系。接地平面上的逐渐大小的圆周扼流圈切断了沿地平面的过大的径向电流，以实现激发和再激励模式的改进混合。在一个实施例中，锥形接地平面上的周向扼流圈通过分流带部分地分流，所述分流带电或电容地桥接阻塞壁以重新建立沿接地平面的有限径向电流，以维持某些期望的天线模式。在另一个公开的实施例中，被驱动的螺旋或对数元件与反射接地面之间的等效四分之一波长关系保持在天线结构中，其中从动元件设置在介电圆锥体和接地平面的表面上，大小的圆周扼流圈布置在大致平面的阵列中。在另一个公开的实施例中，周向的逐渐尺寸的扼流器设置在中心馈电的天线喇叭的内部反射表面上，其中扼流圈阵列具有宽带化喇叭的另外固有窄带特性的效果。

2. 发明授权

US4630064A Spiral antenna with selectable impedance 失效
标题翻译：螺旋天线可选阻抗
公开(公告)号：US4630064A
公开(公告)日：1986-12-16
申请号：US537485
申请日：1983-09-30
申请人： George S. Andrews , Thomas L. Blakney , Douglas D. Connell , Bernard J. Lamberty , James R. Lee
发明人： George S. Andrews , Thomas L. Blakney , Douglas D. Connell , Bernard J. Lamberty , James R. Lee
IPC分类号： H01Q9/27 , H01Q25/02 , H01Q1/36
CPC分类号： H01Q9/27 , H01Q25/02
摘要： A monopulse spiral antenna system of the type having a minimum of three, interwound spiral arms for multimode, direction of arrival sensing, is disclosed in which the antenna arms are shaped and arranged in an overlapping configuration that allows the interarm impedance of the antenna to be adjusted, substantially independently of other electrical properties of the antenna, for matching of the antenna impedance of a mode forming network while preserving the broadband, directional capabilities of the antenna. Several different embodiments of the impedance adaptive antenna are disclosed including a preferred, eight-arm exponential spiral in which the arms are conductive strips transversely inclined relative to a plane formed by the spiral so that opposed and parallel surfaces of adjacent arm strips create a dominant interarm capacitance that in turn determines the overall input impedance of the antenna. Furthermore, the opposed, proximate surfaces of the strip-shaped arms are dimensioned, spaced and inclined at an angle that adapts the input impedance of the antenna to a value matching that of the mode forming network.
摘要翻译：公开了一种具有至少三个用于多模式的相互缠绕的螺旋臂，到达方向感测的单脉冲螺旋天线系统，其中天线臂成形并布置成重叠配置，其允许天线的间隔阻抗为基本上独立于天线的其它电气特性进行调节，以便匹配模式形成网络的天线阻抗，同时保持天线的宽带方向性能。公开了阻抗自适应天线的几个不同实施例，其包括优选的八臂指数螺旋，其中臂是相对于由螺旋形成的平面横向倾斜的导电条，使得相邻臂条的相对且平行的表面形成主要的间隙电容又决定了天线的整体输入阻抗。此外，条形臂的相对的近邻表面的尺寸，间隔和倾斜，其角度使天线的输入阻抗适应于与模式形成网络的输入阻抗匹配的值。

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