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公开(公告)号：US4356496A
公开(公告)日：1982-10-26
申请号：US231383
申请日：1981-02-04
申请人： Ronald I. Wolfson , Ching-Fai Cho
发明人： Ronald I. Wolfson , Ching-Fai Cho
摘要： A multiple-port loop-coupled commutating feed for a circular or cylindrical antenna array which is circumferentially scanned. A rotor assembly having a plurality of elongated coupling loops circumferentially spaced about an arc of its perimeter is fed from a stripline feed configuration excited at the driven central axis of the rotor. The rotor loops are formed by extension of printed circuit traces extant within the stripline feed about an arc of the rotor assembly. A plurality of elongated stator loops with essentially the same radial dimensions as the aforementioned rotor loops is provided, however the stator loops are distributed throughout the full 360.degree. of the circular perimeter of the device to continuously couple a changing fraction of the stator loops to the rotor as the latter is rotated. An output port is provided connected to each stator loop and these output ports may then be discretely connected to corresponding elements of a circular array or columns of elements of a cylindrical array.
摘要翻译： 用于圆形或圆柱形天线阵列的多端口环路耦合整流馈电，其圆周扫描。 具有围绕其周边弧线周向间隔开的多个细长联接环的转子组件从在转子的被驱动中心轴线处激发的带状线进给构型进给。 转子环通过围绕转子组件的弧线的带状线进料内的印刷电路迹线的延伸形成。 提供了与上述转子环基本相同的径向尺寸的多个细长的定子环，然而定子环分布在装置的圆周的整个360°内，以将定子环的变化部分连续地连接到 转子随后转动。 提供连接到每个定子回路的输出端口，然后这些输出端口可以离散地连接到圆柱形阵列的圆柱体或多列元件的相应元件。
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2.发明授权Wide frequency band transition between via RF transmission lines and planar transmission lines 失效通过RF传输线和平面传输线之间的宽频带过渡
公开(公告)号：US5930665A
公开(公告)日：1999-07-27
申请号：US985750
申请日：1997-12-05
CPC分类号： H01L23/66 , H01P1/047 , H01L2223/6616 , H01L2223/6622 , H01L2223/6627 , H01L2924/0002 , H01L2924/09701 , H01L2924/15174 , H01L2924/1903 , H01L2924/3011 , H05K3/4611
摘要： A multi-layer circuit structure including a plurality of substrate layers. At least one planar transmission line, including microstrip, stripline, or coplanar line, disposed on the plurality of substrate layers. A via transmission line connected to that at least one planar transmission line and extending through the plurality of substrate layers. The via transmission lines having the same topology as the at least one planar transmission line for providing wide frequency band transition between the via transmission lines and the at least one planar transmission line.
摘要翻译： 一种包括多个基底层的多层电路结构。 设置在多个基板层上的至少一个平面传输线，包括微带线，带状线或共面线。 连接到该至少一个平面传输线并延伸穿过多个基底层的通孔传输线。 所述通孔传输线具有与所述至少一个平面传输线相同的拓扑，用于在所述通孔传输线和所述至少一个平面传输线之间提供宽频带转变。
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3.发明授权Printed circuit board filter having rows of vias defining a quasi cavity that is below a cutoff frequency 有权印刷电路板滤波器，其具有限定低于截止频率的准空腔的通孔列公开(公告)号：US08008997B2
公开(公告)日：2011-08-30
申请号：US11907048
申请日：2007-10-09
申请人： Ching-Fai Cho
发明人： Ching-Fai Cho
IPC分类号： H01P1/207
CPC分类号： H01P1/2088 , H01P5/107 , H05K1/0239 , H05K2201/0715 , H05K2201/09618 , Y10T29/49117
摘要： A low frequency reject filter element is formed on a printed circuit board that utilizes the fact that power transmission in a waveguide is cut-off below a certain frequency. A quasi waveguide cavity is formed in printed circuit board using the top and bottom ground plane of the stripline circuit and using conductive via holes to form the side walls of the cavity. Waveguide cavity mode is launched from the input and output striplines by shorting them to ground. Transformers and matching via hole elements may be used to improve matching. The resulting filter is compact and is highly effective in suppressing low frequency transmissions.
摘要翻译： 在印刷电路板上形成低频抑制滤波器元件，其利用波导内的功率传输被切断到某一频率以下的事实。 在印刷电路板中使用带状线电路的顶部和底部接地平面形成准波导腔，并使用导电通孔形成空腔侧壁。 波导腔模式从输入和输出带状线通过短路到地来发射。 变压器和匹配通孔元件可用于改善匹配。 所得到的滤波器是紧凑的并且在抑制低频传输方面是非常有效的。
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公开(公告)号：US5491489A
公开(公告)日：1996-02-13
申请号：US740990
申请日：1991-08-06
CPC分类号： G01S13/951 , H01Q19/15 , H01Q19/17
摘要： A high gain antenna that produces a pencil beam along the ground and a lower gain antenna that produces a beam extending above the pencil beam are coupled to a source of r.f. pulses so that the amplitude of the r.f. pulses applied to the high gain antenna is less than the amplitude of the r.f. pulses applied to the lower gain antenna during airplane detection and the full amplitude of the r.f. pulses during a pulse segment is applied to the high gain antenna during wind pattern detection.
摘要翻译： 产生沿着地面的铅笔光束的高增益天线和产生在笔杆上方延伸的光束的下增益天线被耦合到r.f的源。 脉冲使得r.f. 施加到高增益天线的脉冲小于r.f的振幅。 在飞机检测期间施加到下增益天线的脉冲和r.f的全幅度。 脉冲段期间的脉冲在风模式检测期间被施加到高增益天线。
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公开(公告)号：US4814780A
公开(公告)日：1989-03-21
申请号：US167288
申请日：1988-03-11
申请人： William G. Sterns , Ching-Fai Cho
发明人： William G. Sterns , Ching-Fai Cho
CPC分类号： H01P5/04
摘要： The variable directional coupler of the subject invention employs 3, 4 or n branches in TEM transmission media, such as coax, stripline and microstrip. Precise control of the coupling is acheived by a variable susceptance connected near the mid-point of the crossover.
摘要翻译： 本发明的可变定向耦合器在TEM传输介质中使用3,4或n个分支，例如同轴电缆，带状线和微带线。 耦合的精确控制是通过在交叉点的中点附近连接的可变电纳来实现的。
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公开(公告)号：US20090091402A1
公开(公告)日：2009-04-09
申请号：US11907048
申请日：2007-10-09
申请人： Ching-Fai Cho
发明人： Ching-Fai Cho
CPC分类号： H01P1/2088 , H01P5/107 , H05K1/0239 , H05K2201/0715 , H05K2201/09618 , Y10T29/49117
摘要： A low frequency reject filter element is formed on a printed circuit board that utilizes the fact that power transmission in a waveguide is cut-off below a certain frequency. A quasi waveguide cavity is formed in printed circuit board using the top and bottom ground plane of the stripline circuit and using conductive via holes to form the side walls of the cavity. Waveguide cavity mode is launched from the input and output striplines by shorting them to ground. Transformers and matching via hole elements may be used to improve matching. The resulting filter is compact and is highly effective in suppressing low frequency transmissions.
摘要翻译： 在印刷电路板上形成低频抑制滤波器元件，其利用波导内的功率传输被切断到某一频率以下的事实。 在印刷电路板中使用带状线电路的顶部和底部接地平面形成准波导腔，并使用导电通孔形成空腔侧壁。 波导腔模式从输入和输出带状线通过短路到地来发射。 变压器和匹配通孔元件可用于改善匹配。 所得到的滤波器是紧凑的并且在抑制低频传输方面是非常有效的。
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7.发明授权
公开(公告)号：US5757252A
公开(公告)日：1998-05-26
申请号：US661557
申请日：1996-06-11
CPC分类号： H01L23/66 , H01P5/08 , H01L2223/6616 , H01L2223/6622 , H01L2223/6627 , H01L2924/0002 , H01L2924/09701 , H01L2924/15174 , H01L2924/1903 , H01L2924/3011 , H05K1/0237 , H05K1/115 , H05K3/4611
摘要： A multi-layer circuit structure including a plurality of substrate layers. At least one planar transmission line, including microstrip, stripline, or coplanar line, disposed on the plurality of substrate layers. A via transmission line connected to that at least one planar transmission line and extending through the plurality of substrate layers. The via transmission lines having the same topology as the at least one planar transmission line for providing wide frequency band transition between the via transmission lines and the at least one planar transmission line.
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