Title :
Design and implementation of LNA for 2 to 6 GHz WiMax system
Author :
Her, Man-Long ; Hsu, Hao-Chih ; Lin, Hsin-Hung ; Yuan, Tseng-Hsow ; Chan, Shun-Ping
Author_Institution :
Dept. of Commun. Eng., Feng-Chia Univ., Taichung, Taiwan
Abstract :
In this paper, we present the design of a low noise amplifier (LNA) for WiMAX (802.16e) standard with TSMC 0.18 ¿m RF CMOS process. This circuit, we designed a fully integrated 2 - 6 GHz two stages LNA structures, we employed the resistive shunt-feedback, simplified band-pass filter circuit to achieve wide input impedance matching. In addition, the gain stage amplifier adopts cascode structure to implement amplifier stage. Final, the measured input return loss (S11) is less than -10.9 dB over 2 - 6 GHz range. The maximum power gain (S21) is 16.4 dB and the minimum noise figure is 4.1 dB for 2 - 6 GHz. The 1 dB gain compression performance is approximate -15 dBm. The bias current are the first stage circuit 8.54 mA and the second stage circuit 4.15 mA by a 1.1 V and the total power consumption is 14.5 mW. The total die size is 1.32*1.21 mm2 including the pads.
Keywords :
CMOS analogue integrated circuits; UHF amplifiers; WiMax; integrated circuit design; low noise amplifiers; microwave amplifiers; LNA; RF CMOS; WiMAX (802.16e) standard; WiMax system; band-pass filter circuit; current 4.15 mA; current 8.54 mA; frequency 2 GHz to 6 GHz; gain 16.4 dB; low noise amplifier; noise figure 4.1 dB; power 14.5 mW; power consumption; resistive shunt-feedback; size 0.18 mum; voltage 1.1 V; Band pass filters; CMOS process; Impedance matching; Integrated circuit measurements; Loss measurement; Low-noise amplifiers; Noise figure; Radio frequency; Radiofrequency amplifiers; WiMAX; Cascode; Input Return Loss; Low Noise Amplifier;
Conference_Titel :
Communications, 2009. APCC 2009. 15th Asia-Pacific Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-4784-8
Electronic_ISBN :
978-1-4244-4785-5
DOI :
10.1109/APCC.2009.5375600
