We present a polarization converter composed of bi-layered metal films perforated with rectangle hole pairs in each film. The proposed converter can convert the polarization of an incident linearly-polarized electroma...We present a polarization converter composed of bi-layered metal films perforated with rectangle hole pairs in each film. The proposed converter can convert the polarization of an incident linearly-polarized electromagnetic wave to its orthogonal direction with high efficiency and large bandwidth in the infrared or microwave regions.To make sure of the mechanism of polarization conversion, the current and electric-field distributions at different resonant frequencies are analyzed. It is found that the cross-polarized transmission is due to the near-field coupling between hole pairs in neighboring metal films. Finally, a prototype of the proposed converter is fabricated and measured in the microwave region. Good agreement between the experimental and simulated results is obtained.展开更多
为达到大型复吹转炉低成本、高效化生产的目标,河钢宣钢二钢轧厂针对品种比提高后工艺和设备上暴露出来的问题进行了技术改造。通过取消地磅称重、优化底吹模式、调整氧枪喷头参数、重设出钢口形状等措施,使铁水入炉温度提高约10~15℃,...为达到大型复吹转炉低成本、高效化生产的目标,河钢宣钢二钢轧厂针对品种比提高后工艺和设备上暴露出来的问题进行了技术改造。通过取消地磅称重、优化底吹模式、调整氧枪喷头参数、重设出钢口形状等措施,使铁水入炉温度提高约10~15℃,供氧流量提高约2 500 m 3/h,出钢时间缩短至4.5 min,改善了冶金反应的动力学条件,在强化冶炼的基础上,降低了生产成本。展开更多
文摘We present a polarization converter composed of bi-layered metal films perforated with rectangle hole pairs in each film. The proposed converter can convert the polarization of an incident linearly-polarized electromagnetic wave to its orthogonal direction with high efficiency and large bandwidth in the infrared or microwave regions.To make sure of the mechanism of polarization conversion, the current and electric-field distributions at different resonant frequencies are analyzed. It is found that the cross-polarized transmission is due to the near-field coupling between hole pairs in neighboring metal films. Finally, a prototype of the proposed converter is fabricated and measured in the microwave region. Good agreement between the experimental and simulated results is obtained.
文摘为达到大型复吹转炉低成本、高效化生产的目标,河钢宣钢二钢轧厂针对品种比提高后工艺和设备上暴露出来的问题进行了技术改造。通过取消地磅称重、优化底吹模式、调整氧枪喷头参数、重设出钢口形状等措施,使铁水入炉温度提高约10~15℃,供氧流量提高约2 500 m 3/h,出钢时间缩短至4.5 min,改善了冶金反应的动力学条件,在强化冶炼的基础上,降低了生产成本。
