The experimental results reveal that the radiation pattern of UHF-RFID tag antenna is bidirectional with a gain of 0.31 dBic. In [3], the idea of designing the integrated near-field tag antenna with circularly polarized far-field tag antenna using Hilbert curve structure is proposed. The simulated and measured AR at 922.5 MHz are 1.16 dB and 1.67 dB, and the simulated and measured axial ratio bandwidths (ARBW) are 63 MHz (885 MHz–948 MHz) and 75 MHz (863–938 MHz). The simulated impedance of the HF-RFID and UHF-RFID structures is 6.08 + j236.76 Ω at 13.56 MHz and 14.39 + j147.94 Ω at 922.5 MHz. Observe temperature and other environmental factors — Remotely monitor humidity, temperature and differential air pressure while staying abreast of any factors that fall out of range thanks to automatically sent alerts. With CenTrak’s hospital asset tracking and management system, staff know the exact location and condition of critical resources they need. In the design of the circularly polarized UHF-RFID tag antenna, a square loop radiator is introduced to surround the HF-RFID square spiral structure. The dimension and performance, i.e., single/dual operation band, polarization type of UHF band, and fractional bandwidths ( ≤ −10 dB and AR ≤ 3 dB), are compared under the fair-basis condition. Next-generation connectivity for seamless tracking of your cargo anywhere, anytime. Your asset tracking software must then receive the RFID reads, record that information, and update the database accordingly. London, England, July 25, 2017. The optimization of UHF-RFID tag antenna parameters is carried out using CST Studio Suite, given the conjugate matching between the UHF-RFID tag antenna and the NXP G2X chip and AR < 3 dB. How CenTrak Makes Tracking Mobile Medical Equipment Easy. During the production process, RFID can be used to track parts and enable visibility into the process itself. CenTrak’s Asset Management platform uniquely combines the industry’s most accurate real-time location system with a proven security platform. The impedance bandwidth covers the frequency range of 903–944 MHz, and the axial ratio in boresight direction at 922.5 MHz is 1.67 dB, with the axial ratio bandwidth over 863–938 MHz. The simulated and measured results are in reasonable agreement. The near-field HF-RFID communication can be efficiently performed with lossy materials and other dielectric media. The square spiral inductor is printed on FR4 substrate whose dielectric constant and thickness are 4.3 and 0.8 mm. Review articles are excluded from this waiver policy. However, the main beam is shifted from the boresight direction, and the difference between impedance of the antenna and that of the chip is pronounced. The larger memory in HF-RFID tag is capable of storing the important information such as car owner name, registration information, and others. Figure 12(c) depicts the fabricated prototype antenna that is used for the measurement. Given the input capacitance of NT3H2111 chip at 13.56 MHz of 50 pF, the inductance of the HF-RFID tag antenna should be 2,755 nH, corresponding to its inductive reactance of 234.73 Ω. The Defense Medical Logistics Standard Support system is planning for greater use of RFID … Walter Reed Army Medical Center is planning to use a real-time location system that employs active RFID tags to track some 4,000 pieces of equipment in the hospital. Theoretically, CP radiation is induced when the phase difference between two orthogonal electric fields is 90°. We are committed to sharing findings related to COVID-19 as quickly as possible. Developing RFID vehicle tracking systems has challenges because of the need for the system to deal with moving tags and tags on metal vehicles. Simulations were carried out, and an antenna prototype was fabricated. 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