Design and simulation of low power dual band low noise amplifier for wireless LAN applications
Subject Areas : Electronics Engineering
Omid Eslamifar
1
(Islamic Azad University, M.Sc. Student, Department of Electrical Engineering, Tehran)
Maryam Eslamifar
2
(Payame Noor University, M.Sc. Department of Computer Engineering)
Keywords:
Abstract :
The following paper presents the design and simulation of a low-noise amplifier (LNA) using complementary low power-metal oxide (CMOS) transistors for LAN applications (WLAN 802.11). Input The external capacitor switch connected to the gate-source transistor input node is used in 2 bands of 4.2 and 2.5 GHz. In simultaneous structures using the resonant frequency of the LC tank circuit, the desired frequency is selected, while in the proposed LNA structure, this frequency selection is done only by adding a capacitive switch to the normal degenerate source structure. This reduces the occupied space. It has structures in the circuit compared to others. In addition, the use of the transistor switch technique reduces the power consumption compared to other structures LNA. The offer has a 1 volt power supply and a current of 3.2 mA. The circuit has scattering parameters S11 and S22 less than 19 dB in both frequency bands and has noise numbers of 3.2 and 3.5 dB at 4.2 and 2.5 GHz, respectively. Power output is greater than 20 dB
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_||_[1] S Wu, and B Razavi, “A 900 MHz/1.8 GHz CMOS receiver for dualband applications, IEEE J. Solid-State Circuits, Vol. 33, pp. 2178-85,
[2] Ralf E. Schuh, Peter Eneroth and Peter Karlsson, “Multi-Standard Mobile Terminals”, Proceedings of IST Mobile & Wireless Telecom. Summit, pp 174 - 178, 16th – 19th June 2002.
[3] Andreas F. Molisch, "Wireless Communications", Second Edition, Wiley, Chapter 24 - 26, 2011.
[4] Dharma PrakashAgrawal and Qing-AnZeng, "Introduction to Wireless and Mobile Systems", Third Edition, Cengage Learning, Chapter 11 & 15, 2011.
[5] W C Cheng, J G Ma, and K S Yeo, “A 1 V switchable CMOS LNA for 802.11A/B WLAN applications,” Analog Integrated Circuits and Signal Processing, Vol. 48, pp. 181-4, May. 2006.
[6] L H Lu, H H Hsieh, and Y S Wang, “A compact 2.4/5.2-GHz CMOS dual-band low-noise amplifier,” IEEE Microwave and Wireless Letters, Vol. 15, pp. 685-7, Oct. 2005.
[7] H Song, K Han, J Choi, C Park, and B Kim, “A sub-2 dB NF dual-band CMOS LNA for CDMA/WCDMA applications,” IEEE Microwave and Wireless Letters, Vol. 18, pp. 212-4, Mar 2008.
[8] N J Oh, “Corrections to “CMOS low-noise amplifier design optimization techniques”,” IEEE Trans. Microwave Theory and Techniques, Vol. 55, pp. 1255, June. 2007.