Kin Seong Leong

Learn More
For a dense RFID reader deployment, such as in warehouse RFID deployment, where hundreds of antennas are positioned in a building, the interference between all these readers must be studied carefully to avoid severe reader collisions. Strict RFID regulations and standards have been imposed, trying to address the problem of reader collision and also the(More)
The study and analysis of RFID antenna positioning is important for supply chain large-scale deployment. In a dense reader environment, there are multiples of RFID readers and readers interference reduces the reliability and efficiency of the RFID system. In the worst case, the interference would paralyse an entire RFID system. This paper explores antenna(More)
* Passive UHF Radio Frequency Identification (RFID) tags are potentially low cost and offer good read range for object identification in various types of applications. However, the performance of conventional passive UHF RFID tags will be greatly affected when the tags are attached to metallic objects. In this paper, a small passive UHF RFID tag consisting(More)
A successful demonstration of an EPC Network enterprise system, will not only give a greater confidence to organisations on the feasibility of the EPC Network concepts, but it will also provide researchers in this field with a clearer understanding of the EPC Network concepts and implementation issues in the real world. This will allow researchers to(More)
—For a dense RFID reader deployment, such as in a warehouse, where hundreds of readers will be positioned in a building, the interference between all these readers must be studied carefully to avoid disruption of operations. Strict RFID regulations and standards have been imposed, trying to address the problem of reader collision and also the problem of(More)
Wafer level Isothermal (ISOT) test is a highly accelerated test for interconnect electromigration (EM) evaluation, giving benefits of shorter test time and cost savings. Activation energy and physical failure modes of ISOT tests are determined for Copper (Cu) damascene lines. Comparisons are made with long term package level EM test in these aspects,(More)
Reader collision is not only limited to the interference between interrogator signals from different RFID readers, but to maintain low RFID tag cost, an RFID tag cannot filter a valid interrogation signal in a channel from another valid interrogation signal in another channel. Second Carrier Sensing is then introduced to solve this problem. This paper(More)
* With good read range and fast data rate, UHF Radio Frequency Identification (RFID) is deployed in the supply chain to identify each item uniquely. However, UHF transmission power is easily absorbed by ionised liquids, such as water. Hence, normally, in an environment with lots of liquid products, an HF RFID system is chosen instead. This paper(More)
  • 1