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

✍ Scribed by Qiang Li; Y. P. Zhang

Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
388 KB
Volume
17
Category
Article
ISSN
1096-4290

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✦ Synopsis

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. V

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