Introduction: Radio-Frequency Identification (RFID)-based asset tracking in cabinet environments often encounters unpredictable detection due to multipath fading, metal-induced interference, and tag placement sensitivity, rendering single-band systems unreliable under realworld conditions. This study proposes a dual-band detection approach combining 915 MHz and 2.45 GHz to address these challenges through frequency diversity. Unlike designs confined to closely spaced UHF bands, this method uses a larger spectral gap to benefit from uncorrelated fading and distinct propagation properties. Methods: Theoretical analysis shows that dual-band detection significantly reduces joint failure probability under independent fading. The proposed framework is implemented using commercially available passive tags at both frequency bands, along with a synchronized reader configuration that performs sequential scans in less than one second, ensuring minimal impact on operational throughput. Results: In 180 controlled trials at various scan speeds, power levels, and reader distances, singleband detection fell below 50% under double-speed scanning at 200 cm, while the dual-band method remained above 70%, and in many cases reached 100% reliability. Discussion: Performance trends are further analyzed across individual scenarios, showing that 2.45 GHz links are less affected by metallic shadowing at close range, whereas 915 MHz links maintain more stable detection at longer distances. Conclusion: These findings are discussed in terms of deployment feasibility, indicating that the additional hardware and configuration requirements are offset by the measurable improvement in detection consistency, making the approach applicable for inventory tracking in logistics, warehousing, and industrial automation.
Shen et al. (Wed,) studied this question.