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Design of a Three-Dimensional Antenna UHF in the Form Cubic Intended for RFID, Wireless Sensor Networks (WSNs) and RFID Sensor Networks (RSNs) Applications

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In this article we designed a three-dimensional antenna in cubic form operating in the UHF band [902-928 MHz] (centered at 915 MHz), produces a quasi-isotropic omnidirectional radiation pattern and intended for radio frequency identification (RFID), wireless sensor network (WSN) and RFID sensor network (RSN) applications. This cubic antenna is composed of a dipole which is wound on all the faces of cubic substrate of 2 mil thickness. The substrate used is the liquid crystal polymer (LCP) of relative permittivity ε r = 3 and dielectric loss tangent tan δ = 0.002. An inductive coupling loop has been added for adapting the input impedance of this antenna to a value of 50 Ω. This antenna is simpler in construction and designed, and it has a very important role in non-intermittent communication between the devices of RFID, WSN and RSN. Its electric size Ka equal to 0.49 and its form allows easy wrapping circuits sensors to its interior and to be reconfigured for many values of input impedances. The analysis and optimization have been performed using the 3D electromagnetic simulator HFSS (High Frequency Structure Simulator) and CST MWS (Computer Simulation Technology- MicroWaves Studio).
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Radio Frequency Identification (RFID); Wireless Sensor Network (WSN); RFID Sensor Network (RSN); Dipole Antenna; Quasi-Isotropic Radiation; Liquid Crystal Polymer (LCP)

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