噪声系数最小1.6 dB有高带外抑制的5~6 GHz射频接收前端芯片  

5-6 GHz RF receiver front-end with 1.6 dB minimum noise figure and high out-of-band suppression

作　　者：傅海鹏 程志强 FU Haipeng;CHENG Zhiqiang(School of Microelectronics,Tianjin University,Tianjin 300072,China)

机构地区：[1]天津大学微电子学院,天津300072

出　　处：《浙江大学学报（工学版）》2024年第10期2192-2198,共7页Journal of Zhejiang University：Engineering Science

基　　金：国家自然科学基金资助项目(62074110);国家重点研发计划资助项目(2018YFB2202500).

摘　　要：为了满足射频通信前端接收部分对高线性与带外信号抑制能力的要求,基于130 nm绝缘体上硅工艺设计并实现工作在5~6 GHz的射频接收前端芯片.该前端芯片由带有旁路和带外抑制功能的低噪声放大器(LNA)、射频开关和带隙基准偏置电路等组成.基于共源共栅结构的LNA,在输入匹配中使用LC陷波实现带外抑制;在偏置电路中,使用带隙基准电流源对LNA的偏置进行温度补偿,屏蔽电源纹波影响.对该前端芯片进行流片加工并测试,结果表明,当工作频率为5~6 GHz时,芯片的接收增益为13.4~14.0 dB,输入与输出反射系数均小于-10 dB,频带内的最小噪声系数为1.6 dB,在工作频率内1 dB压缩点的输入功率大于-4 dBm,输入三阶交调点大于+7 dBm.低噪声放大器在整个工作频段内无条件稳定,在2 V供电电压下电路的直流功耗为30 mW,芯片面积为0.56 mm2.To meet the requirements for high linearity and out-of-band signal suppression in the RF communication front-end receiver,an RF receiver front-end operated at 5-6 GHz based on 130 nm SoI technology was proposed.The RF receiver front-end consisted of a low-noise amplifier(LNA)with bypass and out-of-band suppression,an RF switch,and a bandgap reference bias circuit.For a cascode-based LNA,an LC notch filter was used for input matching to achieve out-of-band suppression.In the bias circuit,a bandgap reference current source was used for temperature compensation for the bias of the LNA,thereby shielding the effect of the power supply ripple.The RF receiver front-end was processed and tested.Results showed that within the operating frequency band of 5–6 GHz,the gain of the receiver chip was 13.4-14.0 dB,input and output reflection coefficients were below-10 dB,the minimum noise figure was 1.6 dB,the input 1 dB compression point was greater than-4 dBm,and the input thirdorder intercept point was greater than+7 dBm.The amplifier was unconditionally stable across the entire frequency band.The DC power consumption was 30 mW at 2 V supply voltage,and the chip area was 0.56 mm2.

关 键 词：低噪声放大器(LNA) 带外抑制 绝缘体上硅工艺 射频接收前端 有源偏置 

分 类 号：TN7[电子电信—电路与系统]