A concurrent dual-band CMOS low noise amplifier at 2.4/5.2 GHz for WLAN applications

Abstract

<span>This paper presents a concurrent dual-band CMOS low noise amplifier (LNA) at operating frequency of 2.4 GHz and 5.2 GHz for WLAN applications. The proposed LNA employed cascode common source to obtain high gain using 0.13-µm CMOS technology. The concurrent dual-band frequencies are matched using LC network band-pass and band-stop notch filter at the input and output stages. The filters help to shape the frequency response of the proposed LNA. The simulation results indicate that the LNA achieves a forward gain of 21.8 dB and 14.22 dB, input return loss of -18 dB and -14 dB at 2.4 GHz and 5.2 GHz, respectively. The noise figure of 4.1 dB and 3.5 dB with the input third-order intercept points 7 dBm and 10 dBm are obtained at 2.4 GHz and 5.2 GHz, respectively. The LNA dissipates 2.4 mW power at 1.2 V supply voltage with a chip size of 1.69 mm2.</span>

Ultra-low power 0.45 mW 2.4 GHz CMOS low noise amplifier for wireless sensor networks using 0.13-m technology

“…In the front-end of the RF receiver chain, LNA is a block that cannot be replaced [4][5][6]. The functions of LNA are to boost the signal received from the receiving antenna and transmit the signal with high gain to minimize noise contribution of the next stages [7,8].…”