This paper describes the application of finite element method for obtaining the TE mode′s cutoff wavelength and the field pattern of symmetric quadruple-ridged rectangle waveguide.

应用有限元分析方法计算了对称四脊矩形波导TE模式的传输特性，即截止波长和场结构图传输特性。

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At last, the radiated field of axial-mode helical antenna and double ridged horn antenna is analyzed at this paper.

最后，本文对轴向模螺旋天线和双脊喇叭天线的辐射场进行了分析。

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As a soil conservation tillage method, ridged-furrow has been applied in sloping field.

垄作区田作为水土保持措施已在黑龙江省丘陵地区推广应用。

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