Title :
A switchable single/double-band low noise amplifier
Author :
Wu, Chun-Hung ; Yang, Jeng-Rern
Author_Institution :
Dept. of Commun. Eng., Yuan Ze Univ., Jhongli, Taiwan
Abstract :
This paper presents a switchable single/double-band, low noise amplifier (LNA) for WLAN and WiMax systems. The LNA uses wideband bandpass filters and a capacitor of reduced high frequency signals at input matching networks. At the inter stage, using a series resonator increases gain at high frequency. To obtain a small chip size, this study used two center tapped inductors and a switch. This study simulated design using a TSMC 0.18 μm RF CMOS 1P6M process. The power gain of the LNA was 19.35 dB at 2.4 GHz, 19.83 dB at 3.5 GHz, and 17.3 dB at 5.2 GHz. Noise figures were 2.9 dB at 2.4 GHz, 2.37 dB at 3.5 GHz, and 2.35 dB at 5.2 GHz. The S11 and S22 were lower than -10 dB for all desired frequency bands. The power consumption was 6.97 mW. The total chip area was 0.82*0.87 mm*mm.
Keywords :
CMOS analogue integrated circuits; MMIC amplifiers; UHF amplifiers; UHF integrated circuits; UHF resonators; WiMax; band-pass filters; capacitors; field effect MMIC; inductors; low noise amplifiers; microwave resonators; microwave switches; wideband amplifiers; wireless LAN; LNA; TSMC RF CMOS 1P6M process; WLAN system; WiMax systems; capacitor; center tapped inductors; double-band low noise amplifier; frequency 2.4 GHz; frequency 3.5 GHz; frequency 5.2 GHz; gain 17.3 dB; gain 19.35 dB; gain 19.83 dB; high frequency signal reduction; noise figure 2.35 dB; noise figure 2.37 dB; noise figure 2.9 dB; power 6.97 mW; power gain; series resonator; switch; switchable single low noise amplifier; wideband bandpass filters; Band pass filters; Capacitors; Gain; Impedance matching; Inductors; Switches; WiMAX; Low noise amplifier (LNA); WLAN; WiMAX; low power; switch band;
Conference_Titel :
Computer Research and Development (ICCRD), 2011 3rd International Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-61284-839-6
DOI :
10.1109/ICCRD.2011.5764191