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A wideband U-slot patch antenna with reconfigurable radiation pattern is investigated. The antenna composes three patches which are one coaxial-fed U-slot driven patch and two parasitic patches located near the two non-radiating edges of the middle driven patch. One varactor diode is installed in middle of each parasitic patch. Both beamwidth and main lobe direction can be tuned by controlling the...
A new approximate synthesis method for the substrate integrated coaxial line (SICL) is proposed using the equivalent capacity. Firstly, the SICL is considered as the rectangular coaxial line with the same characteristic impedance, which has a simpler structure. Then, the conventional synthesis method for the SICL which is based on the formula of substrate integrated waveguide (SIW) is theoretically...
To solve the electrical capacitance tomography(ECT) technology "soft field" effect and pathological problem, a new three conjugate gradient algorithm for electrical capacitance tomography is presented. On the basis of analyzing ECT system measurement principle, constructing corrector formula of secant approximation algorithm in second-order information items of objective functions. The feasibility...
To solve the electrical capacitance tomography(ECT) technology ldquosoft fieldrdquo effect and pathological problem, a quasi-Newton new algorithm for electrical capacitance tomography is presented. On the basis of analyzing ECT system measurement principle, constructing corrector formula of secant approximation algorithm in second-order information items of objective functions. The feasibility of...
To solve the problem of two-phase flow measurement for electrode electrical capacitance tomography (ECT), on the basis of analyzing ECT system measurement principle, we constructed the mathematical model of two-phase flow distribution information according to double integral infinitesimal principle, and formed a set of 12-electrode two-phase ECT system. And to speed up the slow convergence rate of...
To solve the problem of two-phase flow measurement for electrode electrical capacitance tomography (ECT),on the basis of analyzing ECT system measurement principle, we constructed the mathematical model of two phase flow distribution information according to double integral infinitesimal principle, and formed a set of 12-Electrode two-phase ECT system. And to speed up the slow convergence rate of...
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