3～6GHz SiGe HBT Cascode低噪声放大器的设计

Design of 3-6 GHz SiGe HBT Cascode Low Noise Amplifier

摘要: 基于Jazz 0.35μm SiGe工艺设计一款满足UWB和IEEE802.11a标准的低噪声放大器.采用并联电感峰化技术与Cascode结构来展宽带宽;完成了芯片版图的设计,芯片面积为1.16 mm×0.78 mm;在带宽为3~6 GHz范围内,最大增益为26.9 dB,增益平坦度为±0.9 dB.放大器的输入输出匹配良好,其回波损耗S₁₁和S₂₂均小于-10dB,输入与输出驻波比小于1.5,1 dB压缩点为-22.9 dBm.在整个频段内,放大器无条件稳定.

Abstract: Based on Jazz 0.35 μm SiGe process,a SiGe HBT low-noise amplifier (LNA) for UWB and IEEE 802.11a application is presented.The technology of inductive shunt peaking and cascade configuration is adopted to enhance the bandwidth.Finally,the chip layout is designed with its area 1.16×0.78 mm².For the range of 3-6 GHz bandwidth,the maximum power gain is 26.9 dB,and gain flatness is ±0.9 dB.The input and output match well,input and output reflections (S₁₁ and S₂₂) are both less than-10 dB,the input VSWR and output VSWR are both less than 1.5,and the 1 dB compression point is-22.9 dBm.The LNA is unconditionally stable in the whole band.