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本文介绍由微波正交极化滤波器、两双曲面、五口喇叭、抛物面组成的双波段单脉冲雷达天线.与典型的由“机械波导转换开关”、单双曲面、四喇叭、抛物面组成的双波段天线相比,有下述优点:天线的双抗性能明显地提高;电气参数有了改善;调试容易;结构简单. 相似文献
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Oscillatory behavior (with a period of about 9 nm) of antiferromagnetic coupling with the thicknesses of Cu and Zr underlayers is reported for sputtered Co(1 nm)/Cu(2.3 nm) multilayers. The related oscillation of magnetoresistance is also observed. Based on the analysis of X-ray diffraction patterns, the variation of crystallographic orientation and modulation period is proved not responsible to the phenomenon. But the underlayer strongly affects the growth orientation of multilayer. 相似文献
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