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In this paper a method to test and measure UHF RFID system is presented. The proposed method allows to characterize a RFID UHF tag independently of its antenna. It does not need additional matching circuit and can be used on an automatic prober. Moreover, its main advantages are to determine the characteristics of the chip while the latter is working and allow establishing several performance criteria...
Wearable textile systems are nowadays a fast growing field. Besides lower prices, wearable tags antenna have to resist laundry cycles which means high pressure, high temperature and humidity. This paper introduces a novel RFID textile tag antenna, made of two distinct antennas coupled together to protect UHF RFID system from environment stress : a circular small-loop antenna packaged with the RFID...
This paper presents the design and fabrication of a flexible tag for UHF RFID application in harsh environments. The proposed flexible tag has good performances when it is attached to non-metallic objects. Besides, after dipping in the water and in the chemical agents many times, the tag performances remain unmodified. Moreover, thanks to the protective layer, the tag becomes flexible and scratch...
The Radio Frequency Identification (RFID) has become, in recent year, very popular in different services and sectors. RFID system helps purchasing and distribution logistics. It provides information about people, goods and products in transit. RFID systems are considered regarding these criteria: read range, non line of sight, read/write data storage, memory capacity [1].
Traditionally antennas are made with metallic elements which conductivity is well known. Currently a novel field appears on antennas applied on textile. Those use new conductive textile materials, which conductivity is significantly different from standard metallic conductors. Nevertheless, knowing the conductivity of an antennas' radiating element is crucial for antennas modeling. We therefore have...
Three novel benzophenones (1–3) were obtained from the roots of Securidaca diversifolia (L.) S.F. Blake along with two known benzylbenzoates and isovanilline. Compound 2 (2,4-dihydroxy-3,3′-dimethoxy-benzophenone) showed moderate inhibitory activity on Herpes simplex virus type 1 proliferation in vitro. The structures of compounds 1–3 were established by the interpretation of their spectroscopic and...
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