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A reconfigurable full-metal-rimmed MIMO antenna is designed and proposed for WWAN/LTE smartphones. This antenna consists of two centro-symmetrically distributed antenna elements and radiation structures using the unbroken metal rim in plastic casing. It can achieve a good isolation of more than 17dB over the entire operation bands. Each antenna element occupies a small ground area of $30\times 6$ ...
Rotor-coupling-rotor system of marine power plant will temporarily install on the rigid foundation for the delivery inspection, all the dynamic parameters are always satisfied with the design requirements; However, once it is installed on the real flexible foundation, rotor vibration of wide variable rotate speed get complicate because of the coupling between misalignment of isolator and dynamic meshing...
This paper presents modeling of core loss resistance for d-q equivalent circuit analysis of IPMSM considering harmonic linkage flux. High efficiency is one of the major advantages of IPMSM, therefore precise loss analysis is required for high efficiency design. However, there is practical limitation of d-q equivalent circuit analysis in the calculation of core loss due to harmonic components of flux...
A compact broadband balun on a silicon substrate is proposed for millimeter wave applications. By utilizing the stacked coupling and compensated line, it is expected that the balun exhibits an amplitude balance of less than 0.1 dB and a phase balance of less than 1° in a frequency range from 70 GHz to 100 GHz. The minimum insertion loss is 0.9 dB in the operational frequency band. The balun size occupies...
A fiber sensing head based on an FBG concatenated with an LPG is proposed with the advantages of simplicity and easy fabrication for applying in index sensing systems.
This paper investigates and compares the inductance evaluation methods for interior permanent magnet synchronous motors (IPMSM). Three major finite element methods will be discussed. First, their detail calculation processes are presented as well as their fundamental principles. Not only the results, but also their solving method, computation time and complexity are compared. Then, the discussion...
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