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为了同时满足无限局域网(wireless local area network,WLAN)和新一代无限保真(wireless fidelity,WIFI)无线通信标准,设计实现了一款增益可多重调节的低功耗双频段低噪声放大器(dual-band low noise amplifier with multiple gain-tunability,MGT-DBLNA).输入级采用串-并联谐振滤波网络以实现双频段输入匹配.放大级采用可调谐的有源电感作负载和偏置电压可变的电流复用结构,一方面,可通过调节有源电感的外部偏压和偏置电路的电压2种不同方式,对MGT-DBLNA的增益进行单独或联合调节,另一方面降低了功耗.输出级采用由电流镜以及共集电极放大器构成的可控缓冲器,可实现增益的进一步调节.基于WIN 0.2μm Ga As HBT工艺库进行验证,结果表明:在不同工作频率2.4、5.2 GHz下,MGT-DBLNA的增益(S21)可分别在3.9~12.3 d B、12.6~20.2 d B范围内调节;输入回波损耗(S_(11))与输出回波损耗(S_(22))均小于-10.0 d B;噪声系数(noisefigure,NF)小于3.4 d B;在5.0 V的工作电压下,静态功耗小于20.0 m W.所提出的MGT-DBLNA不仅实现了增益的大范围调节,同时也降低了功耗.
Designed to meet both wireless local area network (WLAN) and next-generation wireless fidelity (WIFI) wireless communications standards, a low-power, dual-band, low- The input stage uses a series-parallel resonant filter network for dual-band input matching. The amplifier stage uses a tunable active inductor for current with variable load and bias voltage The multiplexing structure, on the one hand, can adjust the gain of the MGT-DBLNA individually or in combination by adjusting the external bias voltage of the active inductor and the voltage of the bias circuit, and on the other hand the power consumption is reduced. The controllable buffer composed of a current mirror and a common-collector amplifier can be used to further adjust the gain.Based on the WIN 0.2μm Ga As HBT technology library, the results show that MGT- The gain (S21) of DBLNA can be adjusted within the range of 3.9-12.3 d B and 12.6-20.2 d B respectively. The input return loss (S 11) and output return loss (S 22) are less than -10.0 d B; Noise figure ( noisefigure, NF) is less than 3.4 d B; static power consumption is less than 20.0 mW at a working voltage of 5.0 V. The proposed MGT-DBLNA not only enables a wide range of gain adjustments, but also reduces power consumption.