400MHz-6GHz高线性正交解调器的分析与设计

Yadi Guo, Jun Fu, B. Chi, Yudong Wang, Jie Cui
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引用次数: 1

摘要

针对400MHz ~ 6GHz的无线通信应用,设计并实现了一种基于SiGe BiCMOS工艺的高线性正交解调器。采用第三互调对消技术改善线性度。采用负反馈结构降低了吉尔伯特混频器的输入阻抗,扩大了其带宽。集成了正交本振信号发生器,在全频段内具有优良的正交性能。测试结果表明,该系统在400MHz ~ 6GHz频段内具有优异的性能。
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Analysis and design of a 400MHz-6GHz quadrature demodulator with high linearity
In the paper, a high linearity quadrature demodulator based on SiGe BiCMOS process is designed and implemented for 400MHz to 6GHz wireless communication application. The 3rd intermodulation cancellation technique is applied to improve linearity. A negative feedback structure is applied to Gilbert mixer to lower its input impedance and expand its bandwidth. Quadrature local oscillator signal generator is integrated, with excellent quadrature performance in the whole band. Measurement results show excellent performance in the frequency band of 400MHz to 6GHz.
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