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    • 64. 发明申请
    • BROADBAND COPLANAR ANTENNA ELEMENT
    • 宽带共线天线元件
    • US20090079653A1
    • 2009-03-26
    • US12212533
    • 2008-09-17
    • Kostyantyn SEMONOVAlexander RabinovichBill Vassilakis
    • Kostyantyn SEMONOVAlexander RabinovichBill Vassilakis
    • H01Q9/16H01Q1/38
    • H01Q1/38H01Q9/065H01Q9/28H01Q19/005H01Q19/24
    • A broadband antenna element configuration having a radiation pattern useful in an antenna array containing a plurality of driven radiating elements that are spatially arranged is disclosed. The antenna element is coplanarly disposed on a suitable planar substrate of dielectric material. The antenna element utilizes a pair of balanced dipole arm elements symmetrically disposed about the centerline of a balanced feed network. Balanced feed network elements are disposed in a broadside symmetrical configuration on first plane and second plane on each side of the aforementioned dielectric. Disposed proximate to each dipole arm element are partially overlapping, parallel planar, frequency bandwidth expanding microstrip lines. The combination of dipole arms and parasitically coupled microstrip lines provides a broad bandwidth radiating element suitable for use in antenna arrays.
    • 公开了一种宽带天线元件配置,其具有在包含空间布置的多个被驱动辐射元件的天线阵列中有用的辐射图。 天线元件共面设置在合适的电介质材料平面基板上。 天线元件利用对称地布置在平衡馈电网络的中心线上的一对平衡偶极臂元件。 平衡的馈电网络元件以前述电介质的每一侧上的第一平面和第二平面上的宽边对称配置设置。 接近每个偶极臂元件的部分是部分重叠的平行平面的带宽扩展微带线。 偶极臂和寄生耦合微带线的组合提供适用于天线阵列的宽带辐射元件。
    • 67. 发明授权
    • Constant gain nonlinear envelope tracking high efficiency linear amplifier
    • 恒定增益非线性包络跟踪高效线性放大器
    • US07440733B2
    • 2008-10-21
    • US11087225
    • 2005-03-23
    • Nikolai MaslennikovMark GurvichAlexander Rabinovich
    • Nikolai MaslennikovMark GurvichAlexander Rabinovich
    • H04B1/04H04Q7/20
    • H03F1/0227H03F1/02H03F1/32H03F3/24H03F2200/102H03G3/004H04B1/0483H04B2001/045
    • An envelope tracking radio frequency (RF) power amplifier having an adaptive envelope signal processing circuit is disclosed. An RF input voltage is sampled by the adaptive envelope signal processing circuit which provides control signals to the power supply which supplies voltages to RF power devices in order to simultaneously satisfy two operating conditions: a) provide best possible efficiency of the power amplifier stages depending on the input signal characteristics and b) provide compensation for RF transistor AM-AM and AM-PM distortion compensation across the power range. In particular, the voltage control provides for constant power amplifier gain across the input signal dynamic range, thus minimizing power amplifier amplitude distortions and extending the useful power amplifier linear dynamic range up to saturation point. The power amplifier thus exhibits better linearity and efficiency than offered by conventional techniques and topologies.
    • 公开了具有自适应包络信号处理电路的包络跟踪射频(RF)功率放大器。 RF输入电压由自适应包络信号处理电路采样,该电路向向RF功率器件提供电压的电源提供控制信号,以便同时满足两个工作条件:a)提供功率放大器级的最佳可能效率,这取决于 输入信号特性和b)在功率范围内为射频晶体管AM-AM和AM-PM失真补偿提供补偿。 特别地,电压控制在输入信号动态范围内提供恒定的功率放大器增益,从而最小化功率放大器幅度失真并将有用的功率放大器线性动态范围扩展到饱和点。 因此,功率放大器比常规技术和拓扑结构提供更好的线性度和效率。