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Ka频段单片集成功率放大器电路设计
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摘要
本论文课题来源于国防科技重点实验室基金项目。课题要求研制Ka频段单片功率放大器,指标要求为: f 0±1GHz,小信号增益15dB,输出功率32dBm。
     根据MMIC发展趋势以及国内实际情况,论文采用多级、多路合成的方法设计Ka频段MMIC功率放大器,并针对Ka频段单片功率放大器展开了研究,包括有源器件模型的验证、无源元件分析、电路拓扑的选取、匹配电路和偏置电路的形式,然后在版图调整规则下,对电路进行了电磁仿真,确定了最终电路版图,最后利用国内现有GaAs 0.25μm工艺对Ka频段MMIC功率放大器进行了流片。
     本课题设计了两种电路结构,进行了三次流片。利用自行设计的测试夹具对功放单片进行了测试,测试结果为:在频率f_0±1GHz范围内,输出功率均大于30dBm,在频率f_0处获得了最高输出功率31.2dBm,输入驻波比小于2.5:1,小信号增益大于15dB。虽然测试结果显示与预期目标还有一定的差距,但该结果还是令人满意的。
The project is from National Science Key Lab Fund project. The objective of the project is to develop a Ka-Band MMIC Power Amplifier. The request is that: f_0±1GHz, small signal gain 15dB, output power 32dBm.
     According the development of the MMIC, the project adopts the method of multi-stage and multi-way to design the power amplifier. The research of the Ka-Band MMIC power amplifier is presented in the paper, including the verified of the model、the analysis of the passive component、the selective of the topology、matching network、the type of the bias circuit, and then the circuit layout is decided by the rule of the layout adjustment and the electromagnetism simulation. Finally, the designed MMIC Power Amplifier circuits are implemented with the 0.25μm GaAs Foundry of domestic. Two different circuit structures are used in this paper, which are carried out three times for technics implements. We test the Ka-Band MMIC power amplifier with the fixture designed by ourself. The results are: the output power>30dBm, the maximal output power is 31.2dBm at f_0, the input voltage standing wave ratio(VSWR) <2.5:1, the small signal gain >15dB in the frequency range of f_0±1GHz. Although the testing results have some distance with the prospective aim, we also get the satisfied results.
引文
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