Title :
A 6-10-GHz ultra-wideband tunable LNA
Author :
Chen, Yang-Chaun ; Kuo, Chien-Nan
Author_Institution :
Dept. of Electron. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan
Abstract :
A CMOS low noise amplifier (LNA) is designed with output tunable over an ultra-wideband. A cascode configuration is employed in the circuit, with inductive source degeneration (ISD) and a three-section bandpass Chebyshev filter to achieve broadband input impedance matching. A source follower acts as the buffer stage for broadband output impedance matching. Signal output is band-tunable over the frequency range from 6 GHz to 10 GHz. The circuit is fabricated in a standard 0.18 μm CMOS process. Circuit performance achieves maximum power gain, S21, of 11.6 dB, the input return loss, S11, better than 9 dB, and the best noise figure of 4.2 dB. The circuit consumes power of 11.6 mW.
Keywords :
CMOS analogue integrated circuits; Chebyshev filters; MMIC amplifiers; Q-factor; band-pass filters; buffer circuits; circuit tuning; impedance matching; integrated circuit design; ultra wideband communication; wideband amplifiers; 0.18 micron; 11.6 mW; 6 to 10 GHz; CMOS low noise amplifier; UWB communication; bandpass filter; broadband input impedance matching; broadband output impedance matching; buffer stage; cascode configuration; inductive source degeneration; source follower; three-section bandpass Chebyshev filter; ultra-wideband tunable LNA; Band pass filters; Broadband amplifiers; Chebyshev approximation; Circuit noise; Frequency; Impedance matching; Low-noise amplifiers; Matched filters; Tunable circuits and devices; Ultra wideband technology;
Conference_Titel :
Circuits and Systems, 2005. ISCAS 2005. IEEE International Symposium on
Print_ISBN :
0-7803-8834-8
DOI :
10.1109/ISCAS.2005.1465781
