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一种基于MEMS技术的新型对称式微波功率传感器 总被引:1,自引:0,他引:1
A novel symmetrical microwave power sensor based on MEMS technology is presented. In this power sensor, the left section inputs the microwave power, while the fight section inputs the DC power. Because of its symmetrical structure, this power sensor provides more accurate microwave power measurement capability without mismatch uncertainty and temperature drift. The loss caused by the microwave signal is simulated in this power sensor. This power sensor is designed and fabricated using GaAs MMIC technology. And it is measured in the frequency range up to 20 GHz with an input power in the 0-80 mW range. Over the 80 mW dynamic range, the sensitivity can achieve about 0.2 mV/mW. The difference between the input power in the two sections is below 0.1% for an equal output voltage. In short, the key aspect of this power sensor is that the microwave power measurement is replaced with a DC power measurement. 相似文献
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分组密码的应用非常广泛,但由于差分密码攻击和线性密码攻击的出现,使分组密码受到致命的打击,文章基于能够保护已有软件和硬件使用分组密码投资的目的,采用多重加密的思想,通过对密码体制强化的方法,提出了一个新的三重加密方案,并分析了其安全性特征,得到了安全性更强的一种算法。 相似文献
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研究了电压控制振荡器(VCO)的相位噪声与构成该振荡器的有源器件的低频噪声的关系,测试了SiBJT、AlGaAs/GaAs HBT和GaInP/GaAs HBT的低频噪声,并分析了各自低频噪声产生的原因,提出了选择GaInP/GaAs HBT VCO来实现微波固体振荡器低相位噪声化这一发展方向。 相似文献
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