Alternative approach to low-noise amplifier design for ultra-wideband applications

作者：Li Qiang; Zhang Y P^*

来源：International Journal of RF and Microwave Computer-Aided Engineering, 2007, 17(2): 153-159.

DOI：10.1002/mmce.20209

• ultra-wideband
• transceiver
• low-noise amplifier
• gain flatness
• CMOS integrated circuits
• RFIC

Conventional ultra-wideband low-noise amplifiers require a flat gain over the entire 3.1-10.6 GHz bandwidth, which severely restraints the trade-off spaces in low noise amplifier design. This article proposes a relaxed gain-flatness requirement based on system level investigations. Considering the wireless transceiver front-end with antenna and propagation channel, the unflat-gain low-noise amplifier with an incremental gain characteristic does not degrade the performance of overall system. As an alternative to its flat-gain counterpart, the proposed unflat gain requirement tolerates gain ripple as large as 10 dB, which greatly eases the design challenges to low-noise amplifier for ultra-wideband wireless receivers. Two low-noise amplifier examples are given to demonstrate the feasibility and design flexibility under the proposed gain-flatness requirement.

• 出版日期2007-3
• 单位南阳理工学院