DocumentCode :
1403686
Title :
CMOS LNA for full-band ultra-wideband systems using a simple wide input matching network
Author :
Lee, Jonathan Y. ; Ham, J.H. ; Lee, Yu Seong ; Yun, T.Y.
Author_Institution :
Dept. of Electr. & Comput. Eng., Hanyang Univ., Seoul, South Korea
Volume :
4
Issue :
12
fYear :
2010
fDate :
12/1/2010 12:00:00 AM
Firstpage :
2155
Lastpage :
2159
Abstract :
An ultra-wideband (UWB) low-noise amplifier (LNA) is proposed with a wideband input matching circuit consisting of a simple second-order Chebyshev filter which reduces the order of the filter, considering loaded parasitic elements. An equivalent circuit including an input matching network and loaded parasitics is analysed for an optimised input reflection coefficient in the UWB full band through calculation and parametric analysis. All loaded parasitics are carefully examined and a crucial parameter with a significant effect on the input matching is determined. The measured input matching corresponds well with the simulated result from the equivalent circuit. The proposed LNA achieves a -3-dB gain bandwidth from 2.5 to 10.5-GHz, a minimum noise figure of 2.8-dB, a maximum power gain of 15.3-dB and an input matching lower than -10-dB. The measured input-referred 1-dB compression is -17-dBm at 7.1-GHz and the measured group delay is about 150-60-ps while consuming 11.6-mW from 1.8-V and 6.4-mA. The LNA is fabricated in a 0.18--m complimentary metal-oxide semiconductor (CMOS) process and the total chip size including testing pads is 1.04-mm2.
Keywords :
CMOS integrated circuits; Chebyshev filters; UHF amplifiers; equivalent circuits; low noise amplifiers; microwave amplifiers; ultra wideband technology; CMOS LNA; equivalent circuit; full-band ultrawideband system; low noise amplifier; parasitic element; reflection coefficient; second-order Chebyshev filter; wideband input matching circuit;
fLanguage :
English
Journal_Title :
Microwaves, Antennas & Propagation, IET
Publisher :
iet
ISSN :
1751-8725
Type :
jour
DOI :
10.1049/iet-map.2010.0096
Filename :
5667244
Link To Document :
بازگشت