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    • 6. 发明申请
    • IMPEDANCE MATCHING CIRCUIT WITH TUNABLE NOTCH FILTERS FOR POWER AMPLIFIER
    • 阻抗匹配电路,带有功率放大器的TUNABLE NOTCH滤波器
    • US20130187712A1
    • 2013-07-25
    • US13356508
    • 2012-01-23
    • Jose CabanillasCalogero D. PrestiBabak NejatiGuy Klemens
    • Jose CabanillasCalogero D. PrestiBabak NejatiGuy Klemens
    • H03F1/00
    • H03H7/40H03F1/565H03F3/19H03F3/245H03H2007/013
    • An impedance matching circuit with at least one tunable notch filter for a power amplifier is disclosed. The power amplifier amplifies an input radio frequency (RF) signal and provides an amplified RF signal. The impedance matching circuit performs output impedance matching for the power amplifier and includes at least one tunable notch filter. Each tunable notch filter has a notch that can be varied in frequency to provide better attenuation of an undesired signal. The at least one tunable notch filter attenuates at least one undesired signal in the amplified RF signal. The at least one tunable notch filter may include (i) a first tunable notch filter to attenuate a first undesired signal at a second harmonic of the amplified RF signal and/or (ii) a second tunable notch filter to attenuate a second undesired signal at a third harmonic of the amplified RF signal.
    • 公开了一种具有用于功率放大器的至少一个可调陷波滤波器的阻抗匹配电路。 功率放大器放大输入射频(RF)信号并提供放大的RF信号。 阻抗匹配电路对功率放大器执行输出阻抗匹配,并且包括至少一个可调陷波滤波器。 每个可调谐陷波滤波器具有可以在频率上变化的陷波,以提供不期望的信号的更好的衰减。 所述至少一个可调陷波滤波器衰减放大的RF信号中的至少一个不需要的信号。 所述至少一个可调陷波滤波器可以包括(i)第一可调谐陷波滤波器,用于衰减放大的RF信号的二次谐波处的第一非期望信号和/或(ii)第二可调陷波滤波器,以衰减第二不可取信号, 放大的RF信号的三次谐波。
    • 9. 发明授权
    • Balanced, retractable mobile phone antenna
    • 平衡的,可伸缩的手机天线
    • US06239755B1
    • 2001-05-29
    • US09429768
    • 1999-10-28
    • Guy KlemensErnest T. OzakiAllen Minh-Triet Tran
    • Guy KlemensErnest T. OzakiAllen Minh-Triet Tran
    • H01Q124
    • H01Q1/244
    • The balanced, retractable dipole antenna comprises a first radiator element that is selectively extendable from, and retractable into, a mobile phone casing, a second radiator element, and a counterpoise that is electrically isolated from a printed wire board (PWB) of a mobile phone. The balanced, retractable dipole antenna further comprises a signal balancing means coupled between a signal source and at least the second radiator element and counterpoise to generate first and second signals, respectively. The first and second signals are substantially equal in magnitude but out of phase by 180 degrees. When the first radiator is extended, the first signal is transferred to the first and second radiator elements, and the second signal is transferred to the counterpoise. When the first radiator element is retracted, the first signal is transferred to the second radiator, while the second signal is transferred to the counterpoise and the first radiator element. The first and second signals produce balanced currents, thereby producing a symmetric radiation pattern.
    • 平衡的可伸缩偶极子天线包括:第一散热器元件,其可选择性地从可移动电话机壳体,第二散热器元件和与移动电话的印刷线路板(PWB)电隔离的平衡线伸出并可伸缩 。 平衡的可伸缩偶极天线还包括耦合在信号源和至少第二辐射体元件之间的信号平衡装置和平衡点,以分别产生第一和第二信号。 第一和第二信号的幅度基本相等,但是相位相差180度。 当第一辐射器被扩展时,第一信号被传送到第一和第二辐射器元件,并且第二信号被传送到平衡。 当第一散热器元件缩回时,第一信号被传送到第二辐射器,而第二信号被传送到平衡线和第一散热器元件。 第一和第二信号产生平衡电流,从而产生对称的辐射图。