Compaction uniformity and environmental adaptability of printed RFID antenna

The manufacture of RFID antenna tags (RFIDs) using silk-screen printing technology with conductive silver paste is one of economic methods to reduce the cost of RFIDs. The distance between conductive particles is minified via hot compaction to conductive silver paste, resulting in lower resistance and higher Q value. The compaction conditions, including temperature, pressure and time, were systematically studied based on the analysis method of uniform design, with regression equation by nonlinear regression analysis fitted by Minitab Statistical Analysis Software. The effect of environmental factors to resistance of RFID antenna was also studied through the high and low temperature impact test and the constant temperature and humidity test. The results indicate that resistance of RFID antenna printed with conductive silver paste can be reduced more than 50%, the resistance variation of RFID antenna can be predicted by regression equation with correlation coefficient 99.8% in certain range and antenna printed with conductive silver paste have good environmental adaptability.