A concurrent dual-band 2.4/5.2 GHz low-noise amplifier using gain enhanced techniques

Hong, Yu-Jun; Wang, San-Fu; Chen, Po-Tsung; Hwang, Yuh‐Shyan; Chen, Jiann‐Jong

doi:10.1109/apemc.2015.7175329

Cited by 17 publications

(2 citation statements)

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“…Although this is a simple method for receiving multiple frequency bands simultaneously, the receiver sensitivity can be degraded due to the presence of unwanted signals in the wide frequency band. The most effective technique to achieve DB-LNA is to insert the notch filters in a wideband LNA [15][16][17][18][19][20]. Compared to the switchable LNAs, in this approach, the LNA supports simultaneous dual-band operations and consumes lower power.…”

Section: Introductionmentioning

confidence: 99%

“…Compared to the switchable LNAs, in this approach, the LNA supports simultaneous dual-band operations and consumes lower power. Hong et al [17] used the cascode topology with gain boosting technique to achieve high gain and proper input matching. 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.…”

Section: Introductionmentioning

confidence: 99%

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Concurrent Dual-Band Inverter-Based Low Noise Amplifier (LNA) for WLAN Applications

2021

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In 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 low frequency 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 for 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.

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