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    • 2. 发明授权
    • Variable gain amplifier
    • 可变增益放大器
    • US06392487B1
    • 2002-05-21
    • US09631182
    • 2000-08-02
    • Angelos Alexanian
    • Angelos Alexanian
    • H03F345
    • H03G1/0023
    • A variable gain amplifier or amplification stage uses a current steering circuit to split amplifier output current between a gain path and a shunt path to control amplifier gain. One or more primary current steering circuit devices in the gain and shunt paths are inversely controlled to determine in what ratio the amplifier output current splits between the gain and shunt paths. One or more smaller, secondary current steering circuit devices connect in parallel with gain path primary circuit devices and are commonly controlled with the shunt path primary circuit devices. This arrangement insures a well-controlled minimum gain path current at a minimum amplifier gain setting. Minimum gain occurs when the gain path primary circuit devices are fully off and the shunt path primary circuit devices are fully on. In this state, the gain path secondary circuit devices are on and a small amount of amplifier output current flows through the gain path. With well-defined minimum gain path current, the amplifier stage provides stable minimum gain characteristics that can be made relatively insensitive to temperature and device variations. Further, gain control does not interfere with amplifier biasing, thus improving amplifier linearity. Gain control inputs provide the ability to vary amplifier gain between the well-defined minimum and maximum gain settings, with excellent linearity and low intermodulation distortion over the gain control range. Various configurations of the amplifier gain stage address both single-ended and differential amplifier topologies.
    • 可变增益放大器或放大级使用电流转向电路在增益路径和分路路径之间分离放大器输出电流,以控制放大器增益。 增益和分流路径中的一个或多个初级电流转向电路装置被反向控制,以确定放大器输出电流在增益和分路之间分流的比例。 一个或多个较小的次级电流转向电路装置与增益路径初级电路装置并联连接,并且通常由分路路径初级电路装置控制。 这种布置确保在最小放大器增益设置下的良好控制的最小增益通路电流。 当增益路径初级电路器件完全关闭并且分路路径初级电路器件完全接通时,会发生最小增益。 在这种状态下,增益路径二次电路器件导通,并且少量的放大器输出电流流过增益路径。 利用明确的最小增益通路电流,放大器级提供稳定的最小增益特性,可以对温度和器件变化相对不敏感。 此外,增益控制不会影响放大器偏置,从而提高放大器线性度。 增益控制输入提供了在明确定义的最小和最大增益设置之间改变放大器增益的能力,在增益控制范围内具有出色的线性度和低互调失真。 放大器增益级的各种配置既可解决单端和差分放大器拓扑结构。
    • 3. 发明授权
    • Universal fixture/package for spatial-power-combined amplifier
    • 用于空间功率组合放大器的通用夹具/封装
    • US6028483A
    • 2000-02-22
    • US73705
    • 1998-05-06
    • Jeffrey B. ShealyDavid B. RenschAngelos AlexanianRobert York
    • Jeffrey B. ShealyDavid B. RenschAngelos AlexanianRobert York
    • H03F3/60
    • H03F3/602H03F3/195H03F3/24
    • A combined test fixture and spatial-power-combined amplifier includes a base, a first waveguide mounting flange engaged to said base, a second waveguide mounting flange engaged to said base, a waveguide input fixed to said first flange, a waveguide output fixed to said second flange, an amplifier array disposed between said first flange and second flange, said array comprising a plurality of semiconductors for amplifying a signal, and a spacer for spacing apart said semiconductors. A plurality of amplifier cards constitute the array, with the cards being disposed in various arrangements which include a linearly stacked arrangement and radially stacked arrangement. The first and second waveguide mounting flanges are constructed to slide along the base to enable the amplifier array to be easily changed.
    • 组合的测试夹具和空间功率组合放大器包括基座,接合到所述基座的第一波导安装凸缘,接合到所述基座的第二波导安装凸缘,固定到所述第一凸缘的波导输入,固定到所述基座的波导输出 第二凸缘,设置在所述第一凸缘和第二凸缘之间的放大器阵列,所述阵列包括用于放大信号的多个半导体,以及用于间隔开所述半导体的间隔件。 多个放大器卡构成阵列,其中卡被布置成包括线性堆叠布置和径向堆叠布置的各种布置。 第一和第二波导安装凸缘被构造成沿着底座滑动以使放大器阵列容易地改变。
    • 4. 发明申请
    • Apparatus, system, and method for measuring power delivered to a load
    • 用于测量输送到负载的功率的装置,系统和方法
    • US20070032209A1
    • 2007-02-08
    • US11196371
    • 2005-08-03
    • Nitin JainRajanishAngelos Alexanian
    • Nitin JainRajanishAngelos Alexanian
    • H04B1/04H01Q11/12
    • H03F3/189H03G3/3042H04B2001/0416
    • Apparatus, system, and method including a circuit including an element having an electrical impedance, an input node to receive a signal, and an output node to couple to a load; a sensing circuit coupled to the input node and the output node to sense a differential voltage between the input and output nodes and to sense a detected voltage at the input node; and a multiplier circuit to receive the differential voltage and to receive the detected voltage. The multiplier circuit provides an output voltage proportional to the instantaneous power delivered to the load based on the differential voltage, the detected voltage, and the impedance of the element. A system may further include a radio frequency (RF) power amplifier (PA). A method may further include controlling a gain of the RF PA to maintain the power delivered to the load at a predetermined level based on the output voltage of the multiplier circuit.
    • 装置,系统和方法包括包括具有电阻抗的元件的电路,用于接收信号的输入节点和耦合到负载的输出节点; 感测电路,其耦合到所述输入节点和所述输出节点,以感测所述输入和输出节点之间的差分电压并且感测所述输入节点处的检测到的电压; 以及用于接收差分电压并接收检测到的电压的乘法器电路。 乘法器电路提供与基于差分电压,检测电压和元件的阻抗而传递给负载的瞬时功率成比例的输出电压。 系统还可以包括射频(RF)功率放大器(PA)。 方法还可以包括控制RF PA的增益,以基于乘法器电路的输出电压将输送到负载的功率保持在预定电平。
    • 5. 发明授权
    • Folded optics antenna
    • 折叠光学天线
    • US06307522B1
    • 2001-10-23
    • US09501864
    • 2000-02-10
    • Angelos Alexanian
    • Angelos Alexanian
    • H01Q1900
    • H01Q19/195
    • An antenna (1) having an EM feed (6), a rear parabolic twist reflector (3) and a front transreflector (2). The transreflector is closer to the parabolic twist reflector than the focal point of the parabolic twist reflector, and the twist reflector is defined, mounted, or otherwise formed on a parabolic surface (17) of a base (13). The base is dimensioned and arranged to provide a foundation aligning an axis of the parabolic twist reflector with an axis of the antenna, and is further dimensioned and arranged to maintain substantial alignment of the feed and twist reflector with variations in ambient temperature that would otherwise produce at least one of warping and misalignment of the parabolic twist reflector in the absence of the base.
    • 具有EM馈电(6),后抛物线扭转反射器(3)和前透射反射器(2)的天线(1)。 反射器比抛物线扭转反射器的焦点更靠近抛物线扭转反射器,并且扭转反射器被限定,安装或以其它方式形成在基座(13)的抛物线表面(17)上。 基座的尺寸和布置成提供使抛物线扭转反射器的轴线与天线的轴线对准的基座,并且进一步尺寸和布置以保持进给和扭转反射器的基本对准,其环境温度变化,否则将产生 在没有基座的情况下抛物线扭转反射器的翘曲和未对准中的至少一个。
    • 8. 发明授权
    • High efficiency broadband coaxial power combiner/splitter with radial
slotline cards
    • 高效宽带同轴功率组合器/分路器,带有径向槽线卡
    • US5920240A
    • 1999-07-06
    • US873069
    • 1997-06-11
    • Angelos AlexanianRobert A. York
    • Angelos AlexanianRobert A. York
    • H01P5/12H03F3/60
    • H01P5/12
    • A high-powered, solid state microwave and millimeter wave, power combiner and divider is provided by using a plurality of radially oriented tapered slotline cards disposed in a center cylindrical coaxial section between its inner and outer conductors. The cylindrical coaxial section in turn is coupled to a conical input coaxial section that couples and distributes the input signal among the plurality of cards, and an output coaxial section that combines the output signal from the plurality of cards to an output coaxial terminal. The device is compact with broadband performance and provides a natural heat sink for a plurality of lower powered devices, which enables the power combiner to use a large number of lower powered devices to meet larger power requirements.
    • 通过使用设置在其内导体和外导体之间的中心圆柱形同轴部分中的多个径向定向的锥形槽线卡来提供高功率固态微波和毫米波,功率组合器和分配器。 圆筒形同轴部分依次耦合到锥形输入同轴部分,该锥形输入同轴部分耦合并分配多个卡中的输入信号,以及输出同轴部分,其将来自多个卡的输出信号组合到输出同轴终端。 该设备紧凑,具有宽带性能,并为多个低功率设备提供了自然散热器,这使得功率组合器能够使用大量低功率设备来满足更大的功率需求。
    • 9. 发明授权
    • Apparatus, system, and method for measuring power delivered to a load
    • 用于测量输送到负载的功率的装置,系统和方法
    • US07392021B2
    • 2008-06-24
    • US11196371
    • 2005-08-03
    • Nitin JainRajanishAngelos Alexanian
    • Nitin JainRajanishAngelos Alexanian
    • H03C1/62H04B1/04G01R19/00H03G3/00
    • H03F3/189H03G3/3042H04B2001/0416
    • Apparatus, system, and method including a circuit including an element having an electrical impedance, an input node to receive a signal, and an output node to couple to a load; a sensing circuit coupled to the input node and the output node to sense a differential voltage between the input and output nodes and to sense a detected voltage at the input node; and a multiplier circuit to receive the differential voltage and to receive the detected voltage. The multiplier circuit provides an output voltage proportional to the instantaneous power delivered to the load based on the differential voltage, the detected voltage, and the impedance of the element. A system may further include a radio frequency (RF) power amplifier (PA). A method may further include controlling a gain of the RF PA to maintain the power delivered to the load at a predetermined level based on the output voltage of the multiplier circuit.
    • 装置,系统和方法包括包括具有电阻抗的元件的电路,用于接收信号的输入节点和耦合到负载的输出节点; 感测电路,其耦合到所述输入节点和所述输出节点,以感测所述输入和输出节点之间的差分电压并且感测所述输入节点处的检测到的电压; 以及用于接收差分电压并接收检测到的电压的乘法器电路。 乘法器电路提供与基于差分电压,检测电压和元件的阻抗而传递给负载的瞬时功率成比例的输出电压。 系统还可以包括射频(RF)功率放大器(PA)。 方法还可以包括控制RF PA的增益,以基于乘法器电路的输出电压将输送到负载的功率保持在预定电平。
    • 10. 发明授权
    • Planar transmission line to waveguide transition for a microwave signal
    • 平面传输线到微波信号的波导转换
    • US06396363B1
    • 2002-05-28
    • US09465644
    • 1999-12-17
    • Angelos AlexanianNitin JainThomas Budka
    • Angelos AlexanianNitin JainThomas Budka
    • H03H500
    • H01P5/107
    • A transition from a planar transmission line to a waveguide has a planar transmission line patterned onto a glass substrate. A mode transformer 1 on the substrate 3 is electrically connected to a transmission line 2 and converts a transverse electric or quasi-transverse electric mode signal carried by the transmission line to a waveguide mode signal. A combination of a first extension of the substrate 3 and a dielectric portion having some depth makes up a first impedance matching element 13. A second impedance matching element 14 is a combination of a second extension of the substrate 3 and a dielectric portion having another depth greater than the first depth. The aperture created by the second impedance matching element launches an RF signal into the air for use as a wireless communication signal. Also disclosed is a method for optimizing a transition according to the teachings of the present invention for alternative dimensions and dielectrics.
    • 从平面传输线到波导的转变具有图案化到玻璃基板上的平面传输线。 基板3上的模式变压器1电连接到传输线2,并将由传输线承载的横向电或准横向电模式信号转换为波导模式信号。 衬底3的第一延伸部和具有一定深度的电介质部分的组合构成第一阻抗匹配元件13.第二阻抗匹配元件14是衬底3的第二延伸部和具有另一深度的电介质部分的组合 大于第一深度。 由第二阻抗匹配元件产生的孔径将RF信号发射到空中用作无线通信信号。 还公开了根据本发明的教导优化用于替代尺寸和电介质的转变的方法。