Investigation of mounting effect for single layer dual mode antenna for UHF RFID tag using open stubs

Single layer dual mode antenna for UHF RFID tag using open stubs has recently been introduced with a simple design method. Only simulated results have been shown that the antenna can be excellently used for both metallic and non-metallic objects. In this paper, single layer dual mode antennas for UHF RFID tag using open stubs are fabricated on FR4 substrates. Four different mounting methods on a metallic object are investigated for its effect. The measured results show that the method of mounting the tags on a metallic object significantly affects the discrepancy between simulated and measured results. A better antenna design method is required to reduce the effect of the gap between a FR4 substrate and a metallic object.