Smaller RFID Tags (IMAGE) North Carolina State University Caption Researchers at North Carolina State University have developed a suite of techniques that allow them to create passive radio-frequency identification tags that are 25 percent smaller -- and therefore less expensive. This is possible because the tags no longer need to convert alternating current to direct current in order for the tags to function effectively. Credit Paul Franzon Usage Restrictions Image credit must be provided. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.