公开(公告)号：US4097814A

公开(公告)日：1978-06-27

申请号：US807715

申请日：1977-06-17

申请人： Marvin Cohn

发明人： Marvin Cohn

IPC分类号： H03F3/26 ,  H03F3/60

CPC分类号： H03F3/265 ,  H03F3/601

摘要： A push-pull power amplifier for amplifying an input signal is described where anti-phase signals are generated from the input signal using a first hybrid junction for driving a pair of transistors and where anti-phase transistor output signals are combined in-phase on an output line by using a second hybrid junction. An independent port may be added to the hybrid junction for isolating and terminating even order harmonics and even order intermodulation products.

摘要翻译： 描述了用于放大输入信号的推挽功率放大器，其中使用第一混合结从输入信号产生反相信号，用于驱动一对晶体管，并且其中反相晶体管输出信号同相地组合在一起 输出线。 可以将独立端口添加到混合结，用于隔离和终止偶次谐波，甚至顺序互调产物。

公开(公告)号：US5325129A

公开(公告)日：1994-06-28

申请号：US72388

申请日：1993-06-07

申请人： Howell G. Henry ,  Russell R. Shaller ,  Ronald G. Freitag ,  Marvin Cohn ,  David A. Blackwell ,  James E. Degenford

发明人： Howell G. Henry ,  Russell R. Shaller ,  Ronald G. Freitag ,  Marvin Cohn ,  David A. Blackwell ,  James E. Degenford

IPC分类号： H01Q1/24 ,  H03B19/18 ,  H03D7/14 ,  H03D9/06 ,  H04N5/30 ,  H04N5/44

CPC分类号： H04N5/30 ,  H01Q1/247 ,  H03D9/0641 ,  H03B19/18 ,  H03D7/1408

摘要： The present invention provides a monolithic superheterodyne detector pixel operable to receive a radio frequency (RF) signal at millimeter wavelength and produce a video output signal with many orders of improved sensitivity when compared with the prior art. This sensitivity improvement is achieved by translating the received RF signal to a intermediate frequency (IF) signal before detection of the video signal. At the lower frequency of the IF signal, monolithic amplification circuitry can be fabricated more easily to provide necessary gain than would be achievable if simple amplification of the RF signal were attempted. Detector pixels constructed in accordance with the invention each contain an antenna for receiving the RF signal. Local oscillator (LO) signal circuitry likewise apply an externally generated LO signal to the pixel. The RF signal and LO signal are then applied by interconnecting conductors to appropriate mixer means to produce the IF signal. An IF amplifier next amplifies the IF signal to a level sufficient for detection of the video output signal by a second detector. In presently preferred embodiments, pixel circuitry is fabricated in microstrip format with impedance matching provided between respective monolithic components. The antenna and local oscillator signal circuitry may each comprise slots defined in the metallized ground plane of the detector substrate. Utilization of a subharmonic mixer permits the external LO signal to be a subharmonic of the "virtual LO" mixed with the received RF signal. The amplifier may comprise a plurality of cascaded field effect transistor (FET) amplifier stages. The second detector, as well as diodes utilized in the mixer, are preferably Schottky barrier diodes.

摘要翻译： 本发明提供了一种单片超外差检测器像素，其可操作以在毫米波长处接收射频（RF）信号，并且与现有技术相比产生具有许多改进灵敏度级数的视频输出信号。 通过在检测到视频信号之前将接收到的RF信号转换为中频（IF）信号来实现该灵敏度提高。 在IF信号的较低频率下，可以更容易地制造单片放大电路，以提供比尝试简单放大RF信号时可实现的增益。 根据本发明构造的检测器像素每个都包含用于接收RF信号的天线。 本地振荡器（LO）信号电路同样将外部产生的LO信号施加到像素。 然后通过互连导体将RF信号和LO信号施加到适当的混频器装置以产生IF信号。 IF放大器接下来将IF信号放大到足以由第二检测器检测视频输出信号的电平。 在目前优选的实施例中，以微带格式制造像素电路，其中阻抗匹配提供在相应的单片元件之间。 天线和本地振荡器信号电路可以各自包括限定在检测器基板的金属化接地平面中的槽。 使用次谐波混频器允许外部LO信号与所接收的RF信号混合的“虚拟LO”的次谐波。 放大器可以包括多个级联场效应晶体管（FET）放大器级。 第二检测器以及在混合器中使用的二极管优选是肖特基势垒二极管。

公开(公告)号：US5070304A

公开(公告)日：1991-12-03

申请号：US543919

申请日：1990-06-21

申请人： Mike L. Salib ,  Marvin Cohn

发明人： Mike L. Salib ,  Marvin Cohn

IPC分类号： H03F3/60

CPC分类号： H03F3/604 ,  H03F3/607

摘要： An improved distributed amplifier usable, for example, in the gigahertz frequency range for radar and electronic warfare applications is disclosed. In the amplifier stage a combination of optimum amplifier stage loading, a reflection cancelling output network, and an amplifier capacitance hiding input arrangement are employed. The disclosure includes specific component values for one embodiment of the invention.

摘要翻译： 公开了一种可用于雷达和电子战应用的千兆兹频率范围内的改进的分布式放大器。 在放大器级中，采用最佳放大器级负载，反射消除输出网络和放大器电容隐藏输入装置的组合。 本公开包括本发明的一个实施例的特定组件值。

公开(公告)号：US4951060A

公开(公告)日：1990-08-21

申请号：US247222

申请日：1988-09-21

申请人： Marvin Cohn

发明人： Marvin Cohn

IPC分类号： H01Q21/00

CPC分类号： H01Q21/0025

摘要： An improved, dual frequency transmit-receive module operable for use with two harmonically related frequencies. This dual frequency transmit-receive module utilizing; a push-pull class B power amplifier having dual output ports, a standard frequency mixer and a harmonic mixer, is operable to transmit or receive an original frequency as well as a second harmonic of that same frequency, simultaneously or at distinct, discrete intervals. This improved dual frequency transmit-receive module is operable in any radar system, using only one, or a multiplicity of antennas. However, this transmit-receive module has specific application to active aperture radar systems utilizing one antenna means for each individual transmit-receive module in an active antenna array.

摘要翻译： 一种改进的双频率发射接收模块，可操作用于两个谐波相关的频率。 该双频发射接收模块利用; 具有双输出端口的推挽B类功率放大器，标准混频器和谐波混频器可操作以同时或以不同的离散间隔发送或接收该相同频率的原始频率以及二次谐波。 这种改进的双频率发射 - 接收模块可在任何雷达系统中操作，仅使用一个或多个天线。 然而，该发射接收模块具有对有源天线阵列中的每个单独发射 - 接收模块使用一个天线装置的主动孔径雷达系统的具体应用。

公开(公告)号：US4612520A

公开(公告)日：1986-09-16

申请号：US740355

申请日：1985-06-03

申请人： Daniel C. Boire ,  James E. Degenford ,  Marvin Cohn

发明人： Daniel C. Boire ,  James E. Degenford ,  Marvin Cohn

IPC分类号： H01P1/185 ,  H01P1/18

CPC分类号： H01P1/185

摘要： A wideband 180-degree digital phase shifter bit is provided which is operable independently of input rf frequency over a predetermined bandwidth of interest. The phase shifter bit comprises a coupled transmission line segment and a pi network segment, with switching means for alternatively connecting the rf input and rf output first to the coupled transmission line segments, and then to the pi network.

摘要翻译： 提供宽带180度数字移相器位，其可以在预期的感兴趣带宽上独立于输入rf频率工作。 移相器位包括耦合的传输线段和pi网络段，其中切换装置用于将rf输入和rf输出交替地连接到耦合的传输线段，然后到pi网络。

公开(公告)号：US4083004A

公开(公告)日：1978-04-04

申请号：US693987

申请日：1976-06-08

申请人： Marvin Cohn

发明人： Marvin Cohn

IPC分类号： H04B7/14

CPC分类号： H04B7/15

摘要： An expendable signal repeater for transmitting a replica of received signals in which the received signals are converted to an intermediate frequency by mixing in a down-converter with an upper harmonic of a heterodyning signal provided by a local oscillator; the intermediate frequency signals are delayed; and the delayed, intermediate frequency signals are converted to the transmitted signal by mixing in an up-converter with the upper harmonic of the amplified, local oscillator heterodyning signal. A mechanism is provided for switching the local oscillator between the down-converter and the up-converter during the delay of the intermediate frequency signals to prevent feedback of the transmitted signal.

公开(公告)号：US4081679A

公开(公告)日：1978-03-28

申请号：US778753

申请日：1977-03-17

申请人： Marvin Cohn

发明人： Marvin Cohn

IPC分类号： G01K11/00 ,  G01J1/00

CPC分类号： G01K11/006

摘要： A radiometer in which independent thermal signals are combined to form first and second receiver channel input signals that are coherent with respect to each other. The first and second receiver channel input signals are independently processed in parallel receiver channels to provide first and second correlation signals, each of which include a thermal signal component and a noise signal component. The first and second correlation signals are then correlated to provide an output signal for the radiometer. If, in the combination of the independent first and second thermal signals to form the first and second receiver channel input signals, the portion of the first thermal signal included in one of the receiver channel input signals is quadrature phase shifted with respect to the portion of the first thermal signal included in the other receiver channel input signal, and, similarly, the portion of the second thermal signal that is included in the other receiver channel input signal is quadrature phase shifted with respect to the portion of the second thermal signal included in the one receiver channel input signal, an improvement in the radiometer sensitivity is realized. Alternatively, if the portion of the first thermal signal included in one receiver channel input signal is phase shifted one hundred eighty degrees with respect to the portion of the first thermal signal included in the other receiver channel input signal, the radiometer will discriminate between the independent thermal signals.

摘要翻译： 一种辐射计，其中独立的热信号被组合以形成相对于彼此相干的第一和第二接收机通道输入信号。 第一和第二接收机通道输入信号在并行接收机通道中被独立地处理以提供第一和第二相关信号，每个相关信号包括热信号分量和噪声信号分量。 然后将第一和第二相关信号相关以提供辐射计的输出信号。 如果在独立的第一和第二热信号的组合中形成第一和第二接收机信道输入信号，则包括在接收机信道输入信号之一中的第一热信号的部分相对于 第一热信号包括在另一接收机信道输入信号中，并且类似地，包括在另一个接收机信道输入信号中的第二热信号的部分相对于包括在第二热信号中的第二热信号的部分进行正交相移 一个接收机通道输入信号，实现了辐射计灵敏度的提高。 或者，如果包括在一个接收机信道输入信号中的第一热信号的部分相对于包括在另一个接收机信道输入信号中的第一热信号的部分相移了百八十度，则辐射计将区分独立 热信号。

公开(公告)号：US5760661A

公开(公告)日：1998-06-02

申请号：US680303

申请日：1996-07-11

申请人： Marvin Cohn

发明人： Marvin Cohn

IPC分类号： H01P1/185 ,  H01P9/00

CPC分类号： H01P1/185

摘要： A phase shifter includes a transmission line and a plurality of varactor diodes connected in parallel to the transmission line. The varactor diodes have a high enough density that they uniformly load the transmission line. By controlling the reverse biasing of the varactor diodes, the phase shift produced by the phase shifter can be controlled.

摘要翻译： 移相器包括传输线和与传输线并联连接的多个变容二极管。 变容二极管具有足够高的密度，从而均匀地加载传输线。 通过控制变容二极管的反向偏置，可以控制由移相器产生的相移。

公开(公告)号：US5475349A

公开(公告)日：1995-12-12

申请号：US315659

申请日：1994-09-29

申请人： Marvin Cohn

发明人： Marvin Cohn

IPC分类号： H03B1/04 ,  H03B19/16 ,  H03B19/18 ,  H01P1/20

CPC分类号： H03B19/18 ,  H03B1/04 ,  H03B19/16

摘要： A frequency multiplier in which one or more varactors each include arrays of Schottky barrier diodes combined in rows of parallel-connected diodes and columns of series-connected diodes. The arrays are dispersed on a thermal substrate, or confined to a GaAs strip guide on a suitable substrate and in either case employed in various discrete-component or integrated circuit transmissions systems. These series-parallel arrays can be increased in size as desired for power handling capabilities or thermal dissipation and provide readily selectable impedance levels and breakdown voltages. These properties make the frequency multipliers useful in microwave and millimeter-wave systems, including those requiring high-power transmitters.

摘要翻译： 一种倍频器，其中一个或多个变容二极管各自包括并联的并联二极管列和串联二极管列的肖特基势垒二极管阵列。 阵列分散在热衬底上，或者限制在合适衬底上的GaAs带引导件上，并且在各种分立元件或集成电路传输系统中使用。 这些串并联阵列可以根据功率处理能力或散热所需的尺寸增加，并提供易于选择的阻抗水平和击穿电压。 这些特性使得频率乘法器可用于微波和毫米波系统，包括需要大功率发射器的系统。

公开(公告)号：US5406237A

公开(公告)日：1995-04-11

申请号：US185628

申请日：1994-01-24

申请人： Richard J. Ravas ,  Harvey C. Nathanson ,  Marvin Cohn ,  Edward C. Niehenke

发明人： Richard J. Ravas ,  Harvey C. Nathanson ,  Marvin Cohn ,  Edward C. Niehenke

IPC分类号： H03B1/00 ,  H03B19/05 ,  H03B19/18 ,  H01P1/20

CPC分类号： H03B19/18 ,  H03B19/05 ,  H03B2201/031

摘要： The invention provides frequency multiplier circuitry which may be used in the output section of high power microwave systems to efficiently provide higher output frequencies. Generally, one multiplier stage may be utilized to double the frequency of the input signal with several stages being cascaded to achieve even higher frequencies. The varactor diodes utilized in circuits of the invention are preferably constructed primarily of silicon carbide, which has many advantages when compared with current varactors constructed of GaAs or silicon. Some presently preferred embodiments utilize a four terminal varactor bridge instead of a single varactor diode. The invention also teaches several significant techniques for improving the bandwidth of the circuitry, thus allowing variation of the frequency of the input signal without significantly attenuating the output signal.

摘要翻译： 本发明提供了可以在大功率微波系统的输出部分中使用的倍增器电路，以有效地提供更高的输出频率。 通常，可以利用一个乘法器级将输入信号的频率加倍，并且级数级数达到甚至更高的频率。 在本发明的电路中使用的变容二极管优选主要由碳化硅构成，与由GaAs或硅构成的电流变容二极管相比，其具有许多优点。 一些目前优选的实施例利用四端变容二极管代替单个变容二极管。 本发明还教导了用于改善电路带宽的若干重要技术，从而允许输入信号的频率变化而不会显着衰减输出信号。