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0.18mm CMOS LNA/Mixer for UHF RFID Reader  

Woo, Jung-Hoon (Department of Computer Science and Electronic Engineering, University)
Kim, Young-Sik (Department of Computer Science and Electronic Engineering, University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SD / v.46, no.2, 2009 , pp. 45-49 More about this Journal
Abstract
In this paper, a direct down conversion LNA/Mixer has been designed and tested for 900Mhz UHF RFID application. The designed circuit has been implemented in 0.18um CMOS technology with 3.3V operation. In this work, a common gate input architecture has been used to cope with the higher input self jamming level. This LNA/Mixer is designed to support two operating modes of high gain mode and low gain mode according to the input jamming levels. The measured results show that the input referred P1dBs are 4dBm of high gain mode and 11dBm of low gain mode, and the conversion gains are 12dB and 3dB in high and low gain mode respectively The power consumptions are 60mW for high gain mode and 79mW for low gain mode. The noise figures are 16dB and 20dB in high gain mode and low gain mode respectively.
Keywords
RFID; LNA Mixer; 1 dB compression point;
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