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A 0.9V CMOS 3-5 Ghz broadband flat gain low-noise amplifier for ultra-wide band receivers

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4 Author(s)
Alavi-Rad, H. ; Dept. of Electr. Eng., Islamic Azad Univ., Langaroud, Iran ; Ziabakhsh, S. ; Ziabakhsh, S. ; Yagoub, M.C.E.

In this paper, a 3-5 GHz broadband flat gain low-noise amplifier (LNA) for ultra-wide band (UWB) receivers is presented. In this circuit, a cascode and cascade topology with modified input matching are designed in the frequency range of 3- 5 GHz. Choosing a common-gate technique presents greater flatness in broadband gain in the wide band frequency at the less than -3 dB input reflection coefficient. This approach allowed obtaining a flat broadband gain of 16.7±0.15 dB with an input reflection coefficient less than -5 dB, an output reflection coefficient less than -6 dB, and a noise figure less than 4.3 dB. It uses only 0.9 V voltage supply at 0.18 μm technology and consumes 13 mW (excluding buffer).

Published in:

Electrical and Computer Engineering, Canadian Journal of  (Volume:36 ,  Issue: 2 )