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公开(公告)号：US5465420A
公开(公告)日：1995-11-07
申请号：US292944
申请日：1994-08-18
CPC分类号： H03D7/125 , H03D9/0658
摘要： A non-linear active device (32), such as a FET, multiplies multiplicand signals to generate a product signal. A combining circuit (24) combines multiplicand signals into a combined signal. An input matching and conditioning network (28) couples the combined signal to an input of the active device (32). This network (28) matches impedances between sources for the multiplicand signals and the active device (32) at the frequencies of the multiplicand signals, and desirably shorts the product signal's frequencies. A feedback resistor (36) couples between the output and input of the active device (32) to lower impedance at the output and to stabilize the active device (32). An output matching and conditioning network (40) couples a mixed signal from the output of the active device to an output circuit (42). This network (40) matches impedances between the output circuit (42) and the active device (32) at the frequencies of the product signal, and desirably shorts the multiplicand signals' frequencies.
摘要翻译： 诸如FET的非线性有源器件（32）将被乘数信号相乘以产生乘积信号。 组合电路（24）将被乘数信号组合成组合信号。 输入匹配和调节网络（28）将组合信号耦合到有源设备（32）的输入端。 该网络（28）在被乘数信号的频率上匹配被乘数信号的源和有源器件（32）之间的阻抗，并且期望地缩小乘积信号的频率。 反馈电阻器（36）耦合在有源器件（32）的输出和输入端之间，以在输出端降低阻抗并稳定有源器件（32）。 输出匹配和调节网络（40）将来自有源器件的输出的混合信号耦合到输出电路（42）。 该网络（40）以产品信号的频率匹配输出电路（42）和有源器件（32）之间的阻抗，并且期望地将被乘数信号的频率缩短。
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2.发明授权
公开(公告)号：US4843354A
公开(公告)日：1989-06-27
申请号：US273647
申请日：1988-11-18
CPC分类号： H01P1/22 , H01P1/15 , H01P1/2007
摘要： Inductorless bias networks include a bias circuit having a bias return path which is coupled to and biases a variable impedance device in a relatively nonconductive state. Another bias circuit including a FET renders the variable impedance device relatively conductive in response to control signals so that one port is coupled to another port, for instance.
摘要翻译： 无电感偏置网络包括具有偏置返回路径的偏置电路，其偏置在相对非导电状态的可变阻抗器件并且偏置可变阻抗器件。 包括FET的另一个偏置电路使得可变阻抗器件响应于控制信号相对导通，使得例如一个端口耦合到另一个端口。
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公开(公告)号：US5144266A
公开(公告)日：1992-09-01
申请号：US650120
申请日：1991-02-04
IPC分类号： H03H11/38
CPC分类号： H03H11/38
摘要： A broadband high frequency active MMIC circulator which includes low parasitic devices (MESFETs or HEMTs) and shunt feedback for impedance contouring in conjunction with a cascode/cascade isolation/gain network. To achieve circulation, a common series feedback node is required for each active element. While conventional active circulator topologies require the use of a resistive element for operation with a deleterious effect on noise performance, this broadband high frequency active MMIC circulator functions with either resistive or reactive common series feedback. When reactive feedback is selected, major improvements in noise performance can be realized.
摘要翻译： 包括低寄生器件（MESFET或HEMT）的宽带高频有源MMIC环路器以及与共源共栅/级联隔离/增益网络结合的阻抗轮廓的分流反馈。 为了实现循环，每个有源元件都需要一个公共的串联反馈节点。 虽然传统的有源环形器拓扑结构需要使用电阻元件进行操作，对噪声性能产生有害影响，但是这种宽带高频有源MMIC环行器具有电阻或电抗公共串联反馈功能。 当选择反馈反馈时，可以实现噪声性能的重大改进。
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4.发明授权Process for adjusting the impedance of a microwave conductor using an air bridge 失效使用空气桥调整微波导体的阻抗的方法
公开(公告)号：US5387547A
公开(公告)日：1995-02-07
申请号：US965319
申请日：1992-10-23
CPC分类号： H01P3/003 , H01P5/028 , H01L2924/0002 , Y10T29/4913
摘要： A method for providing local matching elements for adjusting the characteristic impedance of local transmission line segments to more closely match the input or output impedance of the particular devices to which they couple. The method includes the step of providing a conductive bridge over the active lead of the transmission line, thereby lowering its characteristic impedance. The method can be applied to narrow transmission line segments needed to make contact to small active devices and/or MMIC's and which otherwise exhibit a substantial impedance mismatch with the small elements.
摘要翻译： 一种用于提供局部匹配元件的方法，用于调整局部传输线段的特征阻抗以更紧密地匹配它们所耦合的特定器件的输入或输出阻抗。 该方法包括在传输线的有源引线上提供导电桥，从而降低其特性阻抗的步骤。 该方法可以应用于与小型有源器件和/或MMIC接触所需的窄传输线段，否则其与小元件呈现实质的阻抗失配。
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公开(公告)号：US5194833A
公开(公告)日：1993-03-16
申请号：US792568
申请日：1991-11-15
CPC分类号： H01P3/003 , H01P5/028 , H01L2924/0002 , Y10T29/4913
摘要： The performance of microwave coplanar and other circuit boards is improved by providing local matching elements for adjusting the characteristic impedance of local transmission line segments to better match the input or output impedance of the particular devices to which they couple. This is accomplished by providing a conductive bridge over the active lead of the transmission line, thereby lowering its characteristic impedance. This is very useful for narrow transmission line segments needed to make contact to small active device and/or MMIC's and which otherwise exhibit a substantial impedance mismatch with such small elements.
摘要翻译： 通过提供用于调整局部传输线段的特征阻抗的局部匹配元件来更好地匹配它们所耦合的特定器件的输入或输出阻抗来提高微波共面和其它电路板的性能。 这通过在传输线的有源引线上提供导电桥，从而降低其特性阻抗来实现。 这对于与小的有源器件和/或MMIC接触所需的窄传输线段非常有用，并且否则与这些小元件呈现出实质的阻抗失配。
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公开(公告)号：US4876516A
公开(公告)日：1989-10-24
申请号：US302525
申请日：1989-01-27
申请人： Richard M. Dougherty
发明人： Richard M. Dougherty
IPC分类号： H03F3/60
CPC分类号： H03F3/607
摘要： A distributed amplifier which increases gain by increasing transconductance comprises a plurality of amplifying elements. Each element includes a darlington amplifier connected in cascade with a FET (field effect transistor) amplifier. The darlington amplifier includes an RC (resistance/capacitance) feedback loop from the drain to the gate. Each of the amplifying elements are coupled in parallel between an input transmission line and an output transmission line. The output transmission line operates as a recombining network as the input signals pass through the amplifying elements. To further increase gain and power output, a time delay line is coupled to each end of the output transmission line. The time delay line simulates the terminating elements normally associated with distributed amplifiers, and collects unguided signals from the output transmission line to recombine them with guided signals at the output. These unguided signals are terminated in conventional distributed amplifiers resulting in approximately a 3 dB (decibal) loss in gain. Recombining the unguided signals with guided signals at the output preserves the 3 dB gain the output transmission line for an overall output increase in gain. The time delay line provides the means for increasing second and third order intercept points of the amplifier by recombining the unguided signals with the guided signals.
摘要翻译： 通过增加跨导增加增益的分布式放大器包括多个放大元件。 每个元件包括与FET（场效应晶体管）放大器级联连接的达林顿放大器。 达林顿放大器包括从漏极到栅极的RC（电阻/电容）反馈回路。 每个放大元件在输入传输线和输出传输线之间并联耦合。 当输入信号通过放大元件时，输出传输线作为重组网络工作。 为了进一步增加增益和功率输出，时间延迟线耦合到输出传输线的每一端。 时间延迟线模拟通常与分布式放大器相关联的终端元件，并从输出传输线收集无引导信号，将其与输出端的引导信号重组。 这些非导向信号在传统分布式放大器中终止，导致增益大约为3 dB（去离子）损耗。 在输出端将无引导信号与导向信号重新组合，保持输出传输线的3 dB增益，从而增加总体输出增益。 时间延迟线提供了通过将非导向信号与引导信号重新组合来增加放大器的第二和第三阶截取点的装置。
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