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Research on WCDMA RF front-end technology

机译:WCDMA RF前端技术研究

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摘要

A kind of WCDMA RF front-end of mobile table is designed in this paper. The main building blocks of this RF front-end are receiving circuit, transmitting circuit, duplexer and regulator. A cascade mode with three LNAs is used in the receiving circuit, and a traditional cascade mode with driver amplifier and power amplifier is used in the transmitting circuit. The final measurement results show that this RF front-end provides maximum transmitting power of 23dBm, power conversion gain of receiving circuit of 40dB, power conversion gain of transmitting circuit of 25dB, gain flatness of less than 1dB, input and output return loss of more than 10dB, output P1dB of 32dBm, ΔIMD3 of −48dBc, and ACLR of −46.29dBc (lower sideband) and −48.56dBc (upper sideband). Therefore, this RF front-end completely meet the standards of WCDMA, which could be installed in the mobile table to use.
机译:本文设计了一种移动台的WCDMA RF前端。该RF前端的主结构块是接收电路,传输电路,双工器和稳压器。接收电路中使用具有三个LNA的级联模式,并且传输电路中使用带驱动器放大器和功率放大器的传统级联模式。最终的测量结果表明,该RF前端提供23dBm的最大发射功率,电源转换电路的电压为40dB,发射电路的电力转换增益25dB,增益平坦度小于1dB,输入和输出返回损耗更多超过10dB,输出P1DB为32dBm,Δimd3的-48dbc,以及-46.29dbc(下边带)和-48.56dbc(上边带)的ACLR。因此,该RF前端完全符合WCDMA的标准,可以安装在移动表中以使用。

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