Abstract
low noise amplifier (LNA); concurrent; dual-band; inverter-basedIn this paper, a two-stage concurrent dual-band low noise amplifier (DB-LNA) operating at 2.4/5.2-GHz is presented for Wireless Local Area Network (WLAN) applications. The current-reused structure using resistive shunt-shunt feedback is employed to reduce power dissipation and achieve a wide frequency band from DC to-5.5-GHz in the inverter-based LNA. The second inverter-based stage is employed to increase the gain and obtain a flat gain over the frequency band. An LC network is also inserted at the proposed circuit output to shape the dual-band frequency response. The proposed concurrent DB-LNA is designed by RF-TSMC 0.18-µm CMOS technology, which consumes 10.8 mW from a power supply of 1.5 V. The simulation results show that the proposed DB-LNA achieves a direct power gain (S 21 ) of 13.7/14.1 dB, a noise figure (NF) of 4.2/4.6 dB, and an input return loss (S 11 ) of −12.9/−14.6 dBm at the 2.4/5.2-GHz bands.
Highlights
Over the past few years, various and new wireless communication standards have been developed to extend transceiver functionalities
The development of the IEEE 802.11a/b (2.4/5.2-GHz) standard has been widely used in Wireless Local Area Network (WLAN) applications due to support for high data rate communication and the wide range of its applications [1,2,3]
The design of the dual-band low noise amplifier (LNA) (DBLNA) includes some challenges such as high gain, low noise performance, low power dissipation, and proper input matching for both bands
Summary
Over the past few years, various and new wireless communication standards have been developed to extend transceiver functionalities. Hong et al [17] used the cascode topology with gain boosting technique to achieve high gain and proper input matching It employs the passive elements as bandpass/bandstop filters in the output network circuit to shape the frequency response, and to obtain a concurrent DB-LNA operating at 2.4/5.2GHz. In addition, it employs the passive elements as bandpass/bandstop filters in the output network circuit to shape the frequency response, and to obtain a concurrent DB-LNA operating at 2.4/5.2GHz This method results in a good performance in terms of linearity and power dissipation, it suffers from the unbalanced amplitude of the gain at the operating frequencies and weak roll-off in gain at the high band. A concurrent DB-LNA with high balanced gain, proper
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