高品质因数的微波光子滤波器分析

Analysis of High Q Microwave Optic Filter

微波光子滤波器是微波通信中的关键部分.其一项重要指标是高品质因数Q,其大小决定了滤波器的选频性能.Q值越高,选频性能越好.影响Q值的因素有很多,如滤波器的抽头系数,自由频程FSR等.对几种典型高Q值微波光子滤波器的结构性能进行了分析,并得到了获得高品质因数Q值的有效方法.

With the increasing demand of communication, the microwave communication is attracting more and more attention. The MPF（Microwave Photonic Filter） is one of the most important parts in the research field. Q value is an important term to MPF. It determines the performance of selective frequency. The higher of Q value, the better of the selective frequency. There are many factors affecting Q value, such as the coefficients of filter and FSR. The characteristics of structure in MPF were analyzed and the effective way to obtain the high Q value was acquired.