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프로그래머블 LNA 기반 RFID 수신감도 파라미터 분석
문구선(Gu-seon Mun),강광원(Gwang-won Kang),장민혁(Min-hyuk Chang),천종훈(Jong-hun Chun),박종안(Jong-an Park) 한국정보기술학회 2008 한국정보기술학회논문지 Vol.6 No.6
This study designed a programmable LNA at the reader receptor to improve performance of UHF bandwidth RFID reader based on a passive transponder. The receiving set is designed to be open when there is a transmit output while when there is no transmit output, a short-cut is done. It is a system that uses the same antenna both for transmit and receiving systems while using physically separate channels. This study analyzed parameters of the cascade noise elements and found that the suggested system showed increased noise elements while noise index of the entire system decreased, 12.56dB and its sensitivity was improved, more than 19.75dB. This study also provided power for the receiving set of the reader and measured signal power shown in the output of a demodulator. It found that when the same input power was used, sensitivity of the suggested system increased, more than 20.81dB, in comparison with input power.