We have presented a novel design for dual frequency RFID antenna with high frequency ratio. This antenna works well in both the HF and UHF bands for RFID operation with a single feed. Comparisons between the new design and the previous design are made and the new design is shown to be less than half of the size of the previous design while offering almost the same performance. A functioning dual frequency RFID tag proves that having a dual frequency RFID system is feasible. Although no dual frequency RFID chip is available at the moment, we hope that this successful design of a compact dual frequency RFID antenna will catalyze the development of a dual frequency RFID chip.