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    • 62. 发明申请
    • Digital pre-distortion for the linearization of power amplifiers with asymmetrical characteristics
    • 具有不对称特性的功率放大器线性化的数字预失真
    • US20040264597A1
    • 2004-12-30
    • US10730419
    • 2003-12-08
    • Andrew Corporation, a Delaware corporation
    • George P. Vella-Coleiro
    • H04K001/02H04L025/03H04L025/49
    • H03F1/3294
    • An input signal is pre-distorted to reduce spurious emissions resulting from subsequent signal amplification. Frequency-dependent pre-distortion is preferably implemented in combination with frequency-independent pre-distortion, where the frequency-dependent pre-distortion corresponds to amplifier distortion that has a magnitude that is proportional to the frequency offset from the carrier frequency and a null90null phase shift on either side of the carrier frequency. The frequency-dependent pre-distortion is generated by differentiating waveforms corresponding to two different sets of pre-distortion parameters with respect to time. In one embodiment, one of the differentiated waveforms is applied to a positive-frequency filter and the other to a negative-frequency filter to generate positive- and negative-frequency pre-distortion signals, respectively, to account for asymmetries in the amplifier characteristics. In another embodiment, only one of the differentiated waveforms is applied to an asymmetric filter (i.e., either a positive-frequency filter or a negative-frequency filter).
    • 输入信号是预失真的,以减少后续信号放大产生的杂散发射。 频率相关的预失真优选地与频率无关的预失真结合实施,其中频率相关的预失真对应于具有与从载波频率的频率偏移成比例的幅度的放大器失真和±90 载波频率两侧的相移。 频率相关的预失真是通过对与两个不同的预失真参数组相对于时间进行微分而产生的。 在一个实施例中,差分波形中的一个被施加到正频率滤波器,另一个被施加到负频率滤波器以分别产生正和负频率预失真信号,以解决放大器特性中的不对称性。 在另一个实施例中,只有一个差分波形被施加到非对称滤波器(即,正频率滤波器或负频率滤波器)。
    • 63. 发明申请
    • Digital pre-distortion for the linearization of power amplifiers with asymmetrical characteristics
    • 具有不对称特性的功率放大器线性化的数字预失真
    • US20040264596A1
    • 2004-12-30
    • US10607924
    • 2003-06-27
    • Andrew Corporation, a Delaware corporation
    • George P. Vella-Coleiro
    • H04K001/02
    • H03F1/3294
    • Pre-distortion, whose magnitudenulland preferably phasenullare frequency-dependent, is applied to an input signal in order to reduce spurious emissions resulting from subsequent amplification of the signal. In preferred embodiments, the pre-distortion technique of the present invention is implemented in combination with the (frequency-independent) magnitude and phase pre-distortion technique described in U.S. patent application Ser. No. 09/395,490 (nullthe '490 applicationnull), where the frequency-dependent pre-distortion corresponds to amplifier distortion that has a magnitude that is proportional to the frequency offset from the carrier frequency and a phase shift of null90null on either side of the carrier frequency. The frequency-dependent pre-distortion is generated by differentiating waveforms corresponding to two different sets of pre-distortion parameters with respect to time. One of the differentiated waveforms is applied to a positive-frequency filter and the other to a negative-frequency filter to generate positive- and negative-frequency pre-distortion signals, respectively, to account for asymmetries in the amplifier characteristics.
    • 预失真(其幅度优选相位是频率依赖的)被施加到输入信号,以便减少由信号的后续放大引起的杂散发射。 在优选实施例中,本发明的预失真技术结合在美国专利申请序列号(S-1)中描述的(频率无关)幅度和相位预失真技术来实现。 第09 / 395,490号(“490应用”),其中频率相关的预失真对应于放大器失真,其具有与从载波频率的频率偏移成正比的幅度,并且相位偏移为±90° 载波频率的任一侧。 频率相关的预失真是通过对与两个不同的预失真参数组相对于时间进行微分而产生的。 差分波形中的一个被施加到正频率滤波器,另一个被施加到负频率滤波器以分别产生正和负频率预失真信号,以解释放大器特性中的不对称性。
    • 66. 发明申请
    • Crimp Connector for Corrugated Cable
    • 波纹电缆压接连接器
    • US20040161969A1
    • 2004-08-19
    • US10248741
    • 2003-02-13
    • ANDREW CORPORATION
    • James WlosJames Krabec
    • H01R009/05
    • H01R9/0518H01R13/5205H01R24/564H01R2103/00
    • A corrugated coaxial cable connector, field installable with a hand crimp tool has a connector interface coupled to the connector end of a hollow cylindrical body; an inner surface of the body is adapted to thread onto the helical corrugations on the outer conductor of the cable. A plurality of ridges on an outer surface of the body corresponding to an internal threaded section forms a crimp surface. An inner contact located coaxially within the body has a socket contact section at the cable end dimensioned for insertion of the inner conductor of the cable and electrical connection therewith. A body barb located on the outer surface of the body provides an acute surface for heat shrink tubing to seal against.
    • 波纹状同轴电缆连接器,可用手压接工具安装的现场具有连接到中空圆柱体的连接器端的连接器接口; 本体的内表面适于螺纹连接到电缆的外导体上的螺旋形波纹上。 与内螺纹部分对应的主体的外表面上的多个脊形成卷曲表面。 位于主体内同轴的内部触点具有在电缆端处的插座接触部分,其尺寸用于插入电缆的内部导体和与其的电气连接。 位于身体外表面上的身体倒钩为热收缩管提供了一个急剧的表面,用于密封。
    • 70. 发明申请
    • INTEGRATED APERTURE AND CALIBRATION FEED FOR ADAPTIVE BEAMFORMING SYSTEMS
    • 用于自适应光束系统的集成孔径和校准进给
    • US20030227420A1
    • 2003-12-11
    • US10163186
    • 2002-06-05
    • Andrew Corporation
    • Joel C. RoperMichael D. Thomas
    • H01Q021/26
    • H01Q3/267H01Q21/26
    • An antenna includes a substrate to which a plurality of dual polarized radiators, each including first and second radiators, are coupled and arranged into a plurality of rows and columns. The substrate has a stripline distribution network coupled to the plurality of dual polarized radiators, with the stripline distribution network including first and second corporate feed networks coupled to a first column of dual polarized radiators among the plurality of columns. The first corporate feed network is coupled to the first radiating elements of the dual polarized radiators in the first column and extends along a first side of the first column, and the second corporate feed network is coupled to the second radiating elements of the dual polarized radiators in the first column and extends generally along a second side of the first column. The substrate has a stripline calibration feed network coupled to the first and second corporate feed networks. The stripline calibration feed network includes a calibration feed trace that extends along the first column of dual polarized radiators intermediate the first and second corporate feed networks.
    • 天线包括基板,多个双极化辐射器(每个包括第一和第二辐射器)耦合到该基板并被布置成多个行和列。 衬底具有耦合到多个双极化辐射器的带状线分配网络,带状线分配网络包括耦合到多个列中的第一列双极化辐射器的第一和第二公共馈电网络。 第一公共馈电网络耦合到第一列中的双极化辐射器的第一辐射元件并且沿着第一列的第一侧延伸,并且第二公共馈电网络耦合到双极化辐射器的第二辐射元件 在第一列中并且大致沿着第一列的第二侧延伸。 衬底具有耦合到第一和第二公司馈电网络的带状线校准馈电网络。 带状线校准馈电网络包括沿着第一和第二公共馈电网络中的双极化辐射器的第一列延伸的校准馈电迹线。