![]() Proposed by EPC, the measure is made from a known dipole antenna (e.g., A.H. Theoretical Maximum Power in the Reference Point This phase is subdivided in: Theoretical Maximum Power in the Reference Point and Power correction factor calculus. 3).Ĭorrection Factor is used to define the UHF RFID tags operation sensitivity ( Tag Turn On), being attached to units under test (UUT). For example, this measurement can be made with Aaronia HF 2025E portable analyzer ( Fig. The maximum noise level allowed for open area is -60dBm, measured with frequency range between 0.5 and 3.0 GHz, band resolution (RBW) of 100 kHz and span of 50 MHz, during one reading hour ( EPC Global 2008 EPC Global (2008) Static test method. Basic directive of noise measure in open area following EPC Global Policy Environment interferences above -60 dBm jeopardize the test in both open or closed areas. As per the EPC Policy, the minimum necessary area, characteristic of open areas, is 2,440 mm × 2,440 mm × 3,660 mm. Ideally, it should be chosen application tests in closed areas (anechoic chamber), but in this case, they could not be performed for economic reasons and purpose of this paper. IEEE Antennas and Propagation Maganize 51(2):11-25. RF Interference in the environment is mostly guided to the aspects related to the places where the tests will take place (open or closed area), as well as to the attentions and minimum measures to be taken in each one of the scenarios ( Griffin and Durgin 2009 Griffin JD, Durgin GD (2009) Complete link budgets for backscatter-radio and RFID systems. Īnd from Puleston and Foster 2006 Puleston DJ, Forster I (2005) The test pyramid: a framework for consistent evaluation of RFID tags from design and manufacture to end use. Response Test structure for the experimental component (adapted from EPC Global 2008 EPC Global (2008) Static test method. Journal of System and Management Sciences 2(1):40-49.) ( Fig. 2012 Gao Y, Zhang Z, Lu H, Wang, H (2012) Calculation of read distance in passive backscatter RFID systems and application. The maximum reading distance depends on the power of electromagnetic signal received by a tag (adapted from Gao et al. 2012 Nikitin PV, Rao KVS, Lam S (2012) UHF RFID tag characterization: overview and state-of-the-art. The distance between UHF RFID passive tag and interrogator antenna is critical for the reading process ( Nikitin et al. It is directed to users performing application static testing of applied tags. This paper may also be used as guideline to implement UHF RFID technology for the early adopter in the aerospace industry. To propose such an innovative approach, an experimental study is conducted to demonstrate the feasibility of this low cost method. ![]() Since current approaches to characterize UHF RFID passive tags are costly and time consuming, an economic deployment is necessary to accelerate this process. It means that the energy to tag turn on is the key performance on the backscattered signal, where environment electromagnetic interference may significantly influence the reading process. ![]() The passive tag itself can harvest power from the RF energy of the reader signal. RFID tags can store data and modify it according to RF signal from the antennas connected to the readers. The system has three major components: reader, antennas and tags attached at the unit under test. The RFID system, based on modulated backscatter process, is a wireless technology with a long history.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |