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This paper has proposed a non-destructive, non-invasive sensor system for classifying durian fruits according to the maturity stages. The design of the sensor system has adopted the principle of wireless communications in which the Rician k-factors were utilized to determine the fruit maturity. The sensor is operable at the 915 MHz frequency. The simulation and experimental results revealed that the...
The antenna design for ultra-wideband (UWB) signal radiation is one of the main challenges of the UWB system, especially when the antenna can satisfy the requirement of low-cost, compactness, linear polarization and bidirectional pattern. This paper proposes a UWB bidirectional antenna with introducing the psi shape feeder to circular disc monopole (CDM) excited elliptical ring for modern base station...
In this paper, CPW-fed slot antennas using loading metallic strips and a widened tuning stub on a finite size reflector that prevents the back radiation and provides the unidirectional radiation are investigated. The dependence of return losses and radiation patterns on the CPW-fed slot to finite reflector size spacing is presented. The IE3D is used for evaluating the antenna characteristics that...
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