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Bijari, A., Zandian, S. (2019). Low Noise Figure and High Conversion Gain CMOS LNA-Mixer for WLAN Applications. Electronic and Cyber Defense, 6(2), 19-31.
Abolfazl Bijari; Salman Zandian. "Low Noise Figure and High Conversion Gain CMOS LNA-Mixer for WLAN Applications". Electronic and Cyber Defense, 6, 2, 2019, 19-31.
Bijari, A., Zandian, S. (2019). 'Low Noise Figure and High Conversion Gain CMOS LNA-Mixer for WLAN Applications', Electronic and Cyber Defense, 6(2), pp. 19-31.
Bijari, A., Zandian, S. Low Noise Figure and High Conversion Gain CMOS LNA-Mixer for WLAN Applications. Electronic and Cyber Defense, 2019; 6(2): 19-31.

Low Noise Figure and High Conversion Gain CMOS LNA-Mixer for WLAN Applications

الکترومغناطیس کاربردی
Article 3, Volume 6, Issue 2 - Serial Number 17, September 2018, Pages 19-31    PDF (1.86 M)
Document Type: Original Article
Authors
Abolfazl Bijari* 1; Salman Zandian2
1Faculty of Electrical and Computer Engineering, University of Birjand, Birjand, Iran.
2Faculty of Electrical and Computer Engineering, University of Birjand, Birjand, Iran,
Receive Date: 26 September 2018,  Revise Date: 24 March 2019,  Accept Date: 18 June 2019 
Abstract
This paper presents a merged low noise amplifier (LNA) and mixer for wireless local area networks (WLANs) applications. The proposed down-conversion LNA-mixer is designed for 2-3 GHz radio frequency (RF) band and an intermediate frequency (IF) of 100 MHz using RF-TSMC CMOS 0.18 μm technology. A new input matching network is introduced for common source LNA to provide good input matching. In addition, the conversion gain (CG) and noise performance of the LNA-mixer are improved by employing an active load and current bleeding technique in the mixer. The proposed LNA-Mixer has been simulated by Advanced Design System (ADS). Simulation results show the high conversion gain of 15–17 dB and low double side-band noise figure (DSB-NF) of 4±0.5 dB as well as high isolation between ports at frequency band of 2-3 GHz. Monte Carlo simulations has been done for the proposed LNA-mixer with 100 samples to verify the impact of process variations and mismatch. For the conversion gain and for DSB-NF, simulation results show respectively a mean (μ) of 15.7 dB with standard deviation (σ) of 0.11 dB, and μ=7.4 dB with σ=0.37 dB and confirm their low sensitivity to process variations. The proposed LNA-Mixer operates at the supply voltage of 1.5 V with power consumption of 19.8 mW.
Keywords
Low noise amplifier; Mixer; Conversion gain; Noise figure; Input matching
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