公开(公告)号：US06714169B1

公开(公告)日：2004-03-30

申请号：US10309497

申请日：2002-12-04

申请人： Loc B. Chau ,  Kuan M. Lee ,  John S. Williams

发明人： Loc B. Chau ,  Kuan M. Lee ,  John S. Williams

IPC分类号： H01Q324

CPC分类号： H01Q21/061 ,  G01S7/032 ,  H01Q23/00

摘要： An integrated module for an active antenna assembly is disclosed. The integrated module is switchable between a receive mode and a transmit mode and includes active components and a dual input wideband balun. The active components includes amplifiers and micro electro-mechanical system (MEMS) switches. The integrated module is adapted for positioning directly behind a radiator of an antenna array.

摘要翻译： 公开了一种用于有源天线组件的集成模块。 集成模块可在接收模式和发送模式之间切换，并包括有源组件和双输入宽带平衡 - 不平衡变压器。 有源器件包括放大器和微机电系统（MEMS）开关。 集成模块适于直接定位在天线阵列的辐射器的后面。

公开(公告)号：US5087922A

公开(公告)日：1992-02-11

申请号：US447974

申请日：1989-12-08

申请人： Raymond Tang ,  Kuan M. Lee ,  Ruey S. Chu

发明人： Raymond Tang ,  Kuan M. Lee ,  Ruey S. Chu

IPC分类号： H01Q5/00 ,  H01Q5/02 ,  H01Q5/321 ,  H01Q5/42 ,  H01Q21/06 ,  H01Q21/12

CPC分类号： H01Q21/12 ,  H01Q21/062 ,  H01Q5/321 ,  H01Q5/42 ,  H01Q9/065

摘要： In a printed circuit embodiment, dielectric boards in a multilayer arrangement have their ends protruding from a ground plane. Sets of printed dipole elements are disposed along the edge of each board. Each set of dipole elements has three feed ports. Bandpass filters are provided for each feed port. Phase shifters are coupled to each of the feed ports through its respective bandpass filter. At the low band, the outer feed ports are shorted by the filters so that the two sections of dipole elements to the left of the center feed port form one lone band dipole arm, and the two sections of dipole elements to the right of the center feed port form the other low band dipole arm. The low band dipole is driven at the center feed port. At the high band, the center feed port becomes an open circuit so that the two sections to the left thereof form one high band dipole, and the two sections to the right thereof form a second high band dipole. The two outer feed ports drive the dipole array at the high band. In an MMIC embodiment, printed circuit stubs are bridged across the outer feed ports. The length of each stub is one wavelength at the low frequency band, and one-and-one-half wavelengths at the high frequency band. At the low frequency, the stubs appear to be short-circuited. At the high frequency band, the terminals of the stubs provide a 180 degree phase difference for a balun.

摘要翻译： 在印刷电路实施例中，多层布置的电介质板的端部从接地平面突出。 印刷偶极子元件沿着每个板的边缘设置。 每套偶极子元件具有三个馈电端口。 为每个进料口提供带通滤光片。 移相器通过其相应的带通滤波器耦合到每个馈送端口。 在低频带处，外部馈电端口被滤波器短路，使得位于中心馈电端口左侧的偶极子元件的两个部分形成一个单带偶极臂，并且偶极子元件的两个部分在中心的右侧 进料口形成另一个低频带偶极臂。 低频带偶极子在中心馈电端口被驱动。 在高频带处，中心馈电端口成为开路，使得其左侧的两个部分形成一个高频带偶极子，并且其右侧的两个部分形成第二高频带偶极子。 两个外部进给端口在高频段驱动偶极子阵列。 在MMIC实施例中，印刷电路短截线跨越外部馈送端口桥接。 每个短截线的长度是低频带的一个波长，高频带的一个波长。 在低频时，短线看起来很短路。 在高频段，短截线的端子为巴伦提供180度的相位差。

公开(公告)号：US4812789A

公开(公告)日：1989-03-14

申请号：US146018

申请日：1988-01-20

申请人： Kuan M. Lee

发明人： Kuan M. Lee

IPC分类号： H01P1/18 ,  H01P1/213 ,  H01P1/207 ,  H01P1/209

CPC分类号： H01P1/2138 ,  H01P1/182

摘要： A wideband balanced diplexer splits an incoming wideband microwave frequency signal into separate upper and lower frequency outputs and possesses a sharp band cut-off to increase effective bandwidth. The diplexer includes a pair of waveguide assemblies for separating the upper frequency band from the incoming signal. Each waveguide assembly includes a tuneable, ridged waveguide phase shifter for shifting the phase of the lower frequency band, a reference waveguide for inserting a delay onto the upper frequency signal in order to compensate for the effects of the phase shifter in the other waveguide assembly, and a high pass filter. The high pass filter includes a ridged waveguide having tapered ends of a shape comprising an exponential function raised to a cosine squared power to increase the bandwidth of the upper frequencies and to provide a sharper frequency cut-off.

摘要翻译： 宽带平衡双工器将进入的宽带微波频率信号分离成单独的上和下频率输出，并具有尖锐的频带截止以增加有效带宽。 双工器包括一对波导组件，用于将上部频带与输入信号分开。 每个波导组件包括可调谐的脊状波导相移器，用于移位较低频带的相位;参考波导，用于将延迟插入到高频信号上，以便补偿另一波导组件中的移相器的影响， 和高通滤波器。 高通滤波器包括脊状波导，其具有包括提升到余弦平方功率的指数函数的形状的锥形端，以增加较高频率的带宽并提供更尖锐的频率截止。

公开(公告)号：US5223838A

公开(公告)日：1993-06-29

申请号：US864733

申请日：1992-04-07

申请人： Raymond Tang ,  Kuan M. Lee ,  Ruey-shi Chu ,  Gordon L. Howard

发明人： Raymond Tang ,  Kuan M. Lee ,  Ruey-shi Chu ,  Gordon L. Howard

IPC分类号： G01S7/28

CPC分类号： G01S7/28

摘要： An apparatus and a method for enhancing the radar cross section of a target. The present invention is an impulse radar system that implements a method that comprises the following steps. A pilot impulse radar pulse is transmitted at a target. The pilot pulse comprises a plurality of individual pulses having respective distinct frequencies generated by the impulse radar system. A return pulse from the target is received by the impulse radar system and provides information indicative of target scattering centers. The return pulse is used as a calibration signal for generating a phase conjugated pulse. The phase conjugated pulse is then transmitted at the target. Processing a target return signal derived from the transmitted phase conjugated pulse enhances the radar cross section of the target because the waveform of the transmitted phase conjugated pulse is matched to the characteristics of the target. The present invention is adapted to detect low radar cross section targets without encountering the problems and frequency restrictions with conventional radar systems. In a second embodiment of the present invention, when a progressive phase variation is applied to the transmit pulses, the radar cross section contributed by backward travelling wave is made to add in phase in the received direction by processing the received target return pulses while adaptively adjusting the phase sequence of the transmitted pulses. When the appropriate phase sequence is achieved which is such that the transmitted pulses match the scattering centers on the target, then an enhanced return signal is received.

摘要翻译： 一种用于增强目标雷达横截面的装置和方法。 本发明是一种实现包括以下步骤的方法的脉冲雷达系统。 在目标位置传输一个导频脉冲雷达脉冲。 导频脉冲包括具有由脉冲雷达系统产生的各自不同频率的多个独立脉冲。 来自目标的返回脉冲由脉冲雷达系统接收并提供指示目标散射中心的信息。 返回脉冲用作生成相位共轭脉冲的校准信号。 相位共轭脉冲随后在目标传输。 由于传输相位共轭脉冲的波形与目标的特性相匹配，处理从传输相位共轭脉冲得到的目标返回信号增强了目标的雷达横截面。 本发明适用于检测低雷达截面目标，而不会遇到常规雷达系统的问题和频率限制。 在本发明的第二实施例中，当对发射脉冲施加逐行相位变化时，通过在自适应调整的同时处理接收到的目标返回脉冲，使由反向行波贡献的雷达横截面在接收方向上相位相加 发射脉冲的相序。 当实现适当的相序使发射的脉冲与目标上的散射中心匹配时，接收增强的返回信号。

公开(公告)号：US4623894A

公开(公告)日：1986-11-18

申请号：US623857

申请日：1984-06-22

申请人： Kuan M. Lee ,  Ruey S. Chu ,  Nam S. Wong ,  James U. Clark ,  Raymond Tang

发明人： Kuan M. Lee ,  Ruey S. Chu ,  Nam S. Wong ,  James U. Clark ,  Raymond Tang

IPC分类号： H01Q5/00 ,  H01Q5/42 ,  H01Q9/06 ,  H01Q21/06 ,  H01Q21/28

CPC分类号： H01Q21/062 ,  H01Q21/061 ,  H01Q5/42 ,  H01Q9/065

摘要： A dual band array antenna is disclosed having interleaved waveguide and dipole arrays, each operating in a different frequency band. The orientation of the waveguides and dipoles is such that polarization of the signals of the two frequency bands is perpendicular to each other, thus reducing mutual coupling. The waveguides are used for the higher frequency band and their cutoff frequency is selected to be above the lower frequency band at which the dipoles operate, in order to reduce mutual coupling into the waveguides. In one embodiment the dipoles are printed on a substrate having a dielectric constant selected so that dipole spacing is the same as the waveguide spacing. This eliminates grating lobe formation in the radiation pattern of the waveguide array. A low pass filter is included in the dipole feed circuit to reject the frequencies at which the waveguides operate. As a result of the invention, two beams of two different frequency bands are independently and simultaneously steerable in a single antenna aperture.

摘要翻译： 公开了一种双波段阵列天线，其具有交错的波导和偶极阵列，每个阵列在不同的频带中工作。 波导和偶极子的取向使得两个频带的信号的极化彼此垂直，从而减少了相互耦合。 波导用于较高频带，并且其截止频率被选择为高于偶极子操作的较低频带，以减少与波导的相互耦合。 在一个实施例中，将偶极子印刷在具有选定的介电常数的基板上，使得偶极间距与波导间隔相同。 这消除了波导阵列的辐射图中的光栅波瓣形成。 偶极馈电电路中包括一个低通滤波器，以抑制波导工作的频率。 作为本发明的结果，两个不同频带的两个波束在单个天线孔径中是独立且同时可控的。

公开(公告)号：US6114997A

公开(公告)日：2000-09-05

申请号：US85157

申请日：1998-05-27

申请人： Kuan M. Lee ,  Allen T. S. Wang ,  Loc Chau

发明人： Kuan M. Lee ,  Allen T. S. Wang ,  Loc Chau

IPC分类号： H01Q1/38 ,  H01Q5/00 ,  H01Q5/378 ,  H01Q9/04 ,  H01Q21/00

CPC分类号： H01Q21/0006 ,  H01Q1/38 ,  H01Q5/378 ,  H01Q9/0414

摘要： A planar, low-profile, very wide frequency bandwidth, wide-scan, dual-linear or circular-polarized phased array antenna using integrated stacked-disc radiator tiles. The stacked-disc radiator configuration comprises a lower active radiator fed by a pair of probes for each polarization state, and a parasitic radiator separated from the active radiator by dielectric material. The stacked-disc radiator is integrated with its multi-layer feed circuits in a very compact package. The feed circuits include 90.degree. hybrid coupler circuits and 180.degree. hybrid coupler circuits that couple dual linear or dual circular polarized energy to and from the disk radiators.

摘要翻译： 采用集成堆叠式散热片的平面，薄型，非常宽的频宽，宽扫描，双线性或圆偏振相控阵天线。 堆叠式盘式散热器配置包括由用于每个偏振状态的一对探针馈送的下部有源辐射器，以及通过电介质材料与有源辐射体分离的寄生散热器。 堆叠式盘式散热器与其多层馈电电路集成在非常紧凑的封装中。 馈电电路包括90°混合耦合器电路和180°混合耦合器电路，将双线性或双圆极化能量耦合到盘式散热器和从盘式散热器耦合。

公开(公告)号：US5745079A

公开(公告)日：1998-04-28

申请号：US678383

申请日：1996-06-28

申请人： Allen T.S. Wang ,  Kuan M. Lee ,  Ruey S. Chu

发明人： Allen T.S. Wang ,  Kuan M. Lee ,  Ruey S. Chu

IPC分类号： H01Q5/00 ,  H01Q5/378 ,  H01Q9/04 ,  H01Q13/08 ,  H01Q21/06 ,  H01Q21/24 ,  H01Q1/38 ,  H01Q1/48

CPC分类号： H01Q21/065 ,  H01Q5/378 ,  H01Q9/0414 ,  H01Q9/0435

摘要： A very wide-band or dual-band phased array antenna using stacked-disc radiators on stacked-dielectric cylindrical posts to form radiator elements. Each radiator element includes a ground plane, a lower dielectric cylindrical post of a high dielectric material adjacent the ground plane, a lower thin conductive radiator disc formed on the upper surface of the lower dielectric post, an upper dielectric cylindrical post of a low dielectric material disposed on top of the lower post and lower radiator disc, and an upper thin radiator disc or annular ring formed on the upper surface of the upper post. The first radiator disc is excited by two pairs of probes arranged in orthogonal locations. Each pair of probes can be fed by coaxial cables with 180 degree phase reversal. The second radiator disc or annular ring is a parasitic radiator without feeding probes. Depending on the feed arrangement, the radiator elements can achieve single-linear polarization, dual-linear polarization or circular polarization.

摘要翻译： 一种非常宽带或双频相控阵天线，在叠层电介质圆柱形柱上使用堆叠式散热器，形成散热器元件。 每个散热器元件包括接地平面，邻近接地平面的高电介质材料的下电介质柱形柱，形成在下电介质柱的上表面上的下薄导电散热片，低电介质材料的上电介质圆柱柱 设置在下部柱和下部散热器盘的顶部，以及形成在上部柱的上表面上的上部薄的散热器盘或环形环。 第一个辐射盘由正交位置上布置的两对探头激发。 每对探头可以通过180度相位反转的同轴电缆进给。 第二个辐射盘或环形环是一个寄生散热器，不需要进料探头。 取决于进料布置，散热器元件可以实现单线性偏振，双线性偏振或圆偏振。

公开(公告)号：US5557291A

公开(公告)日：1996-09-17

申请号：US451084

申请日：1995-05-25

申请人： Ruey-Shi Chu ,  Kuan M. Lee ,  Allen T. S. Wang

发明人： Ruey-Shi Chu ,  Kuan M. Lee ,  Allen T. S. Wang

IPC分类号： H01Q3/26 ,  H01Q5/00 ,  H01Q5/42 ,  H01Q13/08 ,  H01Q13/28 ,  H01Q21/22 ,  H01Q21/28 ,  H01Q21/00 ,  H01Q13/10 ,  H01Q13/00

CPC分类号： H01Q13/085 ,  H01Q5/42

摘要： A multiband phased-array antenna interleaves tapered-element radiators with waveguide radiator to facilitate the simultaneous radiation of antenna beams across a bandwidth in excess of two octaves. The launch ends of the waveguide radiators collectively define a ground plane. The tapered-element radiators have pairs of tapered wings which are extended past the ground plane by a distance which is selected to establish a predetermined tapered wing radiation impedance. The radiators of each type are spaced apart by a span which insures that they will not generate grating lobes at the highest frequency which they respectively radiate.

摘要翻译： 多波段相控阵天线与波导辐射器交错锥形元件辐射器，以便于在超过两个八度的带宽上同时辐射天线波束。 波导辐射器的发射端共同定义了一个接地平面。 锥形元件辐射器具有成对的锥形翼片，其延伸超过接地平面一定距离，该距离被选择以建立预定的锥形翼辐射阻抗。 每种类型的散热器间隔开一跨距，确保它们不会以它们分别辐射的最高频率产生栅瓣。

公开(公告)号：US5389939A

公开(公告)日：1995-02-14

申请号：US40788

申请日：1993-03-31

申请人： Raymond Tang ,  Kuan M. Lee

发明人： Raymond Tang ,  Kuan M. Lee

IPC分类号： H01Q3/46 ,  H01Q5/00 ,  H01Q5/42 ,  H01Q19/06

CPC分类号： H01Q3/46 ,  H01Q5/42

摘要： An ultra wideband (UWB) phased array antenna using a frequency-multiplexing, space-fed lens with a UWB feed horn achieves multi-octave bandwidth. The lens includes two UWB radiating apertures with relatively narrow band phase shifters connecting corresponding radiating elements of the arrays. Each aperture multiplexes the incoming UWB signal into separate frequency bands so that the phase shifters need only be tuned to these narrower frequency bands, and are set to form a beam in the desired direction. For wide instantaneous bandwidth operation, the beams from the various frequency bands are collimated in the same direction. For multi-mode operation, the beams corresponding to the various frequency bands are formed in different directions. The phase shifters need have a maximum phase shift of 360 degrees.

摘要翻译： 使用具有UWB馈电喇叭的频率复用，空间馈送镜头的超宽带（UWB）相控阵天线实现多倍频程带宽。 该透镜包括两个UWB辐射孔，其相对窄带移相器连接阵列的相应辐射元件。 每个孔径将输入的UWB信号复用到单独的频带中，使得移相器仅需要调谐到这些较窄的频带，并且被设置为在期望的方向上形成一个波束。 对于宽瞬时带宽操作，来自各个频带的波束在相同方向上准直。 对于多模式操作，对应于各种频带的波束形成在不同的方向。 移相器需要360度的最大相移。

公开(公告)号：US06781554B2

公开(公告)日：2004-08-24

申请号：US10218792

申请日：2002-08-14

申请人： Kuan M. Lee ,  Reinhardt W. Krueger ,  Fangchou Yang

发明人： Kuan M. Lee ,  Reinhardt W. Krueger ,  Fangchou Yang

IPC分类号： H01Q1310

CPC分类号： H01Q21/068 ,  H01Q13/22 ,  H01Q21/005

摘要： A unit element of a periodically loaded edge slot array includes a reduced-height waveguide section having top and bottom walls and opposed first and second sidewalls defining a waveguide space. A slot is formed in the first side wall at an angle with respect to a waveguide longitudinal axis. At least one conductive post protrudes from the top wall into the waveguide space. The unit element can be incorporated into sticks of an electronically scanned antenna.

摘要翻译： 周期性加载的边缘槽阵列的单元元件包括具有顶壁和底壁以及限定波导空间的相对的第一和第二侧壁的减小高度的波导部分。 在第一侧壁中以与波导纵向轴线成一定角度形成槽。 至少一个导电柱从顶壁突出到波导空间中。 单元元件可以并入电子扫描天线的棒中。