"Development of High-Speed Recognition and Processing System for Korean Band Note and Check for Automatic Teller Machine(ATM)", 1993~1997 , Ministry of Commerce
"Wireless Transmission Techniques for Wireless Packet Signal", 1992~1992 , ETRI
"Development of Ku-Band High-Stable Frequency Synthesizer", 1992~1993 , ETRI
"Development of 12GHz GaAs Frequency Converter ", 1990~1991 , ETRI
"A Study on Development of GaAs Electrooptic Waveguide Modulator", 1990~1992 , Korea Science and Engineering Foundation
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