1. 3.2-9.7 GHz ultra-wideband low-noise amplifier with excellent stop-band rejection.
- Author
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Chang, J.-F. and Lin, Y.-S.
- Subjects
- *
LOW noise amplifiers , *ULTRA-wideband devices , *COMPLEMENTARY metal oxide semiconductors , *BANDPASS filters , *ATTENUATION (Physics) , *BANDWIDTHS , *ELECTRONICS - Abstract
A low-power 3.2-9.7 GHz ultra-wideband low-noise amplifier (UWB LNA) with excellent stop-band rejection by 0.18 µm CMOS technology is demonstrated. High stop-band rejection is achieved by using a passive bandpass filter (BP-filter) with three finite transmission zeros (in the input terminal), one of which (ωz1=0.9 GHz) is in the low-frequency stop-band and the other two (ωz3 and ωz5) are in the high-frequency stop-band. In addition, an active notch filter is used in the output terminal to introduce another low-frequency stop-band transmission zero (ωz2) at 2.4 GHz. The LNA consumes 4.68 mW and achieves S11 of -10 to -39.5 dB, S21 of 9.3±1.5 dB, and an average NF of 6 dB over the 3.2-9.7 GHz band. The measured stop-band rejection is better than 21.6 dB for frequencies DC-2.5 and 11.2-20 GHz. [ABSTRACT FROM AUTHOR]
- Published
- 2012
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