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Design of a LNA-Mixer with on-chip balun for 2.45GHz RFID Applications  

Lim, Tae-Seo (중앙대 공대 전자전기공학부)
Ko, Jae-Hyeong (중앙대 공대 전자전기공학부)
Jung, Hyo-Bin (중앙대 공대 전자전기공학부)
Kim, Hyeong-Seok (중앙대 공대 전자전기공학부)
Publication Information
The Transactions of The Korean Institute of Electrical Engineers / v.56, no.11, 2007 , pp. 1982-1987 More about this Journal
Abstract
This paper presents the design and analysis of LNA-Mixer for 2.45GHz RFID reader. The LNA is implemented by PCSNIM method for low power consumption. The Mixer is implemented by using the Gilbert-type configuration, current bleeding technique and the resonating technique for the tail capacitance. The connection between the two designed circuits is made by active balun. This LNA-Mixer has about 22dB gain and 8.5dB Noise Figure for -50dBm input RF power, LO power is 0dBm, RF frequency is 2.45 GHz and IF frequency is 100kHz. The layout of LNA-Mixer for one-chip design in a 0.18-um TSMC process has $2.5mm{\times}1.0mm$ size.
Keywords
LNA-Mixer; RFID; Active balun;
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