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Aluminum (Al) toxicity in acidic soils is a major factor restricting crop production. Although the molecular mechanisms of Al responses have been extensively investigated, microRNA (miRNA) mediated differential Al tolerance in different soybean genotypes remains largely unknown. In this study, two soybean [Glycine max (L.) Merr.] genotypes, Al-tolerant BX10 and Al-sensitive BD2, were treated with...
This paper presents a target direction finding using six-port technique for short range radar based sensor. Direction finding of the target is determined by performing phase measurement of the incident wave at the receiver side. This technique is also known as Direction of Arrival (DOA) detection method. In this paper, the operation of target direction finding is performed and simulated using Keysight...
This paper presents the development of the six-port baseband processing system for short range radar based sensor. Short range radar involved in many applications such as the used in the automotive system. The analog baseband circuit commercially exists nowadays, but it a little bit bulky and expensive. In this paper, the design of a RF power detector using microstrip technique is presented. The design...
A 24 GHz Substrate Integrated Waveguide power splitter is proposed for use in a six-port short range radar based sensor. In this work, the SIW power splitter is designed with Y-junction configuration. The SIW technique enables the power splitter to have low insertion loss, low cost and features uniplanar circuit. The simulated input return loss is better than 27 dB and the insertion loss is about...
This paper presents the development of wideband power divider using radial stub for six-port interferometer. The performance of designed power divider is evaluated over Ultrawideband (UWB) frequency range across 3.1 GHz to 10.6 GHz. The design of power divider is started with conventional design of Wilkinson power divider. The operating bandwidth of the power divider is improved by introducing radial...
Dual-radial cavity resonators are proposed to design SIW bandstop filter. The bandstop filter is designed by coupling two radial cavity resonators to the SIW line. The designed bandstop filter operates at a centre frequency of 9GHz and implemented on RT/Duriod 4350 substrate with a thickness of 0.508mm and relative permittivity of 3.66. Two single cavity resonator bandstop filters are designed first...
A bandstop filter utilizing Substrate Integrated Waveguide cavity resonators coupled to the SIW line is presented in this paper. Prior to this research, rectangular cavity resonator was utilized to provide a bandstop response. In this paper, circular and radial cavity resonators are proposed to provide a bandstop response. The filters are designed to operate at X-band and implemented on RT/Duriod...
Natural frequencies of rectangular plates carrying a concentrated mass are obtained by employing a set of trigonometric beam functions in the Rayleigh-Ritz method. Two models of the energy method using one-term and 100-term model are used in the study. Results obtained from the analytical study using the energy method are compared with those measured experimentally. It is found that the 100-term analytical...
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