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

fYear

2009

fDate

8-10 Oct. 2009

Firstpage

426

Lastpage

429

Abstract

In this paper, we present the design of a low noise amplifier (LNA) for WiMAX (802.16e) standard with TSMC 0.18 Â¿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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/APCC.2009.5375600

Filename

5375600