因此，变迹idt和金属反射栅的应用是SAW质量传感器Q值的改善的两个重要因素。
Therefore, the application of the apodization IDT and the metal reflector are two important factors to improve the Q value of the SAW mass sensor.
分析表明：可以通过改变光栅的相移点数、选择不同的变迹函数，研制用于WDM和DWDM的滤波器。
The results show that a series of band pass filter applied in WDM and DWDM were made by the change of inserted phase-number and apodising functions.
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