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    • 16. 发明授权
    • Radio-frequency power amplifier device
    • 无线电频率功率放大器装置
    • US5208550A
    • 1993-05-04
    • US863119
    • 1992-04-03
    • Yasushi Iwane
    • Yasushi Iwane
    • H03G3/30H03G3/20
    • H03G3/3042
    • In a radio-frequency power amplifier device, having a radio-frequency power amplifier for an input RF signal, part of the output signal of the amplifier is extracted, and the extracted voltage is compared with a reference voltage to apply a negative feedback to the gain control terminal of the power amplifier, thereby to stabilize the output power. The output power value is switched in accordance with a power level control signal. A variable attenuator or a variable-coupling-coefficient coupling means provided in front of the detector circuit switches the attenuation or the coupling coefficient depending on the power level, such that the magnitude of the input to the detector circuit is maintained at a constant level. The detector circuit therefore operates at the same operating point regardless of the switching of the power level, and the dynamic range required of the detector circuit may be narrow. The temperature variation of the output power at the time of low power output is small.
    • 18. 发明授权
    • Mobile communication system
    • 移动通信系统
    • US09350501B2
    • 2016-05-24
    • US13266336
    • 2010-04-21
    • Miho MaedaMitsuru MochizukiTaiga SaegusaYasushi Iwane
    • Miho MaedaMitsuru MochizukiTaiga SaegusaYasushi Iwane
    • H04L5/00H04W48/12
    • H04W24/02H04L5/0005H04L5/001H04L5/0091H04W36/30H04W48/12
    • A base station which uses either one of a plurality of component carriers individually or uses an aggregate carrier which is an aggregate of the above-mentioned plurality of component carriers to carry out radio communications with a mobile terminal corresponding to the above-mentioned component carrier and also carry out radio communications with a mobile terminal corresponding to the above-mentioned aggregate carrier is provided. The base station notifies a bandwidth of an aggregate carrier which is an aggregate of all of the above-mentioned component carriers, as a bandwidth which the above-mentioned base station uses, to the mobile terminal corresponding to the above-mentioned aggregate carrier. As a result, while an improvement in the transmission rate is provided according to the aggregate carrier, the base station can also support an operation of a mobile terminal corresponding to a component carrier.
    • 使用单独使用多个分量载波中的任一个的基站或使用作为上述多个分量载波的集合的聚合载波来执行与对应于上述分量载波的移动终端的无线电通信,以及 还提供与对应于上述聚合载体的移动终端的无线电通信。 基站将作为上述基站使用的带宽的作为上述所有分量载波的总和的汇聚载波的带宽通知对应于上述聚合载波的移动终端。 结果,虽然根据聚合载波提供传输速率的改进,但是基站也可以支持对应于分量载波的移动终端的操作。