Analysis and Design of a CMOS UWB LNA With Dual-RLC-Branch Wideband Input Matching Network

作者：Lin Yo Sheng^*; Chen Chang Zhi; Yang Hong Yu; Chen Chi Chen; Lee Jen How; Huang Guo Wei; Lu Shey Shi

来源：IEEE Transactions on Microwave Theory and Techniques, 2010, 58(2): 287-296.

DOI：10.1109/TMTT.2009.2037863

• CMOS
• inductive peaking
• LC load
• low-noise amplifier (LNA)
• quality factor (Q factor)
• resistive feedback
• ultra-wideband (UWB)

A wideband low-noise amplifier (LNA) based on the current-reused cascade configuration is proposed. The wideband input-impedance matching was achieved by taking advantage of the resistive shunt-shunt feedback in conjunction with a parallel LC load to make the input network equivalent to two parallel-branches, i.e., a second-order wideband bandpass filter. Besides, both the inductive series- and shunt-peaking techniques are used for bandwidth extension. Theoretical analysis shows that both the frequency response of input matching and noise figure (NF) can be described by second-order functions with quality factors as parameters. The CMOS ultra-wideband LNA dissipates 10.34-mW power and achieves S(11) below -8.6 dB, S(22) below -10 dB, S(12) below -26 dB, flat S(21) of 12.26 +/- 0.63 dB, and flat NF of 4.24 +/- 0.5 dB over the 3.1-10.6-GHz band of interest. Besides, good phase linearity property (group-delay variation is only +/- 22 ps across the whole band) is also achieved. The analytical, simulated, and measured results agree well with one another.

• 出版日期2010-2
• 单位中国科学院电工研究所