This paper presents a design of a reconfigurable low noise amplifier (LNA) for multiband orthogonal frequency division multiplexing (MB-OFDM) ultra wideband (UWB) receivers. The proposed design is divided into three stages; the first one is a common gate (CG) topology to provide the input matching over a wideband. The second stage is a programmable circuit to control the mode of operation. The third stage is a current reuse topology to improve the gain, flatness and consume lower power. The proposed LNA is designed using 0.18？μm CMOS technology. This LNA has been designed to operate in two subbands of MB-OFDM UWB, UWB mode-1 and mode-3, as a single or concurrent mode. The simulation results exhibit the power gain up to 17.35, 18, and 11？dB for mode-1, mode-3, and concurrent mode, respectively. The NF is 3.5, 3.9, and 6.5 and the input return loss is better than ？12, ？13.57, and ？11？dB over mode-1, mode-3, and concurrent mode, respectively. This design consumes 4？mW supplied from 1.2 V. 1. Introduction Ultra wideband (UWB) has many advantages over narrowband technology such as high data rate, low power, low complexity, and low cost technology. When The US Federal Communication Commission (FCC) recognized the potential advantages of UWB, it issued a report that allows UWB use for commercial communication systems in 2002, and its applications can operate in the unlicensed spectrum of 3.1–10.6？GHz [1]. UWB supports carrierless baseband signals such as impulse-radio IR-UWB, and it supports wideband with carrier such as multiband orthogonal frequency division multiplexing MB-OFDM UWB [2]. In MB-OFDM UWB systems, the spectrum from 3.1 to 10.6？GHz is divided into 14 subbands of 528？MHz as shown in Figure 1, which supports data rates from 53 to 480？Mbps [3, 4]. Figure 1: Frequency spectrum of MB-OFDM UWB system. In order to roam across different subbands, devices that support multinetwork applications are required. There is a strong motivation on using single chip supports multiband and multiapplications, due to it provides wireless access for users anywhere and anytime. In such reconfigurable devices, the design of low noise amplifier (LNA) is a critical issue because its has effects in the overall system and requirements as high gain, low noise figure (NF), and lower power consumption, with good input and output matching over each band of interest. Recently, there are some schemes proposed to the multistandard LNAs like parallel, concurrent, wideband, and reconfigurable LNA. The first approach is the parallel architecture that emploies multiple architectures
References
[1]
Federal Communications Commission (FCC), “First Report and Order in The Matter of Revision of Part 15 of the Commission's Rules Regarding Ultra wideband Transmission Systems,” ET-Docket 98-153, FCC 02-48, 2002.
[2]
M. Di Benedetto, T. Kaiser, A. F. Molisch, I. Oppermann, C. Politano, and D. Porcino, UWB Communication Systems a Comprehensive Overview, Hindawi Publishing Co., 2006.
[3]
C. Vennila, G. Lakshminarayanan, and S. Tungala, “Design of reconfigurable UWB transmitter to implement multi-rate MB-OFDM UWB wireless system,” in Proceedings of the International Conference on Advances in Computing, Control and Telecommunication Technologies (ACT '09), pp. 411–413, December 2009.
[4]
T. Gao, F. Zhou, W. Li, N. Li, and J. Ren, “A 6.2–9.5？GHz UWB receiver for WiMedia MB-OFDM,” in Proceedings of the 10th IEEE International Conference on Solid-State and Integrated Circuit Technology, pp. 782–784, November 2010.
[5]
M. A. T. Sanduleanu and M. Vidojkovic, “RF transceiver concepts for reconfigurable and multi-standard radio,” in Proceedings of the 1st European Wireless Technology Conference (EuWiT '08), pp. 29–32, October 2008.
[6]
S. Datta, A. Dutta, K. Datta, and T. K. Bhattacharyya, “Pseudo concurrent quad-band LNA operating in 900？MHz/1.8？GHz and 900？MHz/2.4？GHz bands for multi-standard wireless receiver,” in Proceedings of the 24th International Conference on VLSI Design, pp. 124–129, January 2011.
[7]
X. Yu and N. M. Neihart, “A 2–11？GHz reconfigurable multi-mode LNA in 0.13？μm CMOS,” in Proceedings of the IEEE Radio Frequency Integrated Circuits Symposium, pp. 475–478, IEEE, 2012.
[8]
M. El-Nozahi, E. Sanchez-Sinencio, and K. Entesari, “A CMOS low-noise amplifier with reconfigurable input matching network,” IEEE Transactions on Microwave Theory and Techniques, vol. 57, no. 5, pp. 1054–1062, 2009.
[9]
Y. Wang, F. Huang, and T. Li, “Analysis and design of a fully integrated IMT—advanced/UWB dual-band LNA,” in Proceedings of the International Symposium on Signals, Systems and Electronics (ISSSE '10), vol. 1, pp. 83–86, September 2010.
[10]
J. F. Chang and Y. S. Lin, “0.99？mW 3–10？GHz common-gate CMOS UWB LNA using T-match input network and self-bodybias technique,” Electronics Letters, vol. 47, no. 11, pp. 658–659, 2011.
[11]
J. F. Chang and Y. S. Lin, “A 2.76？mW, 310？GHz ultra-wideband LNA using 0.18？μm CMOS technology,” in Proceedings of the International Symposium on VLSI Design, Automation and Test (VLSI-DAT '11), pp. 188–191, April 2011.
[12]
A. N. Ragheb, G. A. Fahmy, I. Ashour, and A. Ammar, “A 3.1–10.6？GHz low power high gain UWB LNA. Using current reuse technique,” in Proceedings of the 4th International Conference on Intelligent and Advanced Systems (ICIAS '12), vol. 2, pp. 741–744, 2012.
[13]
Q. Wan and C. Wang, “A design of 3.1–10.6？GHz ultra-wideband CMOS low noise amplifier with current-reused technique,” International Journal of Electronics and Communication, vol. 65, no. 12, 2011.
[14]
C. P. Liang, P. Z. Rao, T. J. Huang, and S. J. Chung, “Analysis and design of two low-power ultra-wideband CMOS low-noise amplifiers with out-band rejection,” IEEE Transactions on Microwave Theory and Techniques, vol. 58, no. 2, pp. 277–286, 2010.
[15]
Z. Liu and J. Wang, “A 0.18？μm CMOS reconfigurable multi-band multi-gain low noise amplifier,” in Proceedings of the International Conference on Electric Information and Control Engineering (ICEICE '11), pp. 961–964, April 2011.
[16]
A. Slimane, M. T. Belaroussi, F. Haddad, S. Bourdel, and H. Barthelemy, “A reconfigurable inductor-less CMOS low noise amplifier for multi-standard applications,” in Proceedings of the IEEE 10th International Conference on New Circuits and Systems Conference (NEWCAS '12), pp. 57–60, 2012.
