CAJ | 학술논문

为进一步拓展微波光子滤波器的 FSR(自由谱范围)和提高滤波器的Q值，进行了 IIR(无限冲激响应)滤波器分别与FIR(有限冲激响应)滤波器和 IIR滤波器级联的研究。分析了两种级联结构的滤波特性并给出了相应的传输函数。IIR滤波器与FIR滤波器级联后的FSR与Q值是IIR滤波器的2n倍；IIR滤波器与IIR滤波器级联后的FSR是各个IIR滤波器的FSR的最小公倍数。用 Matlab软件仿真验证了两种级联结构的频率响应特性，实验验证了 IIR滤波器与 IIR滤波器的级联特性。IIR滤波器与 IIR滤波器的级联有望实现宽频率范围内的单通带滤波器。
위진일보탁전미파광자려파기적 FSR(자유보범위)화제고려파기적Q치，진행료 IIR(무한충격향응)려파기분별여FIR(유한충격향응)려파기화 IIR려파기급련적연구。분석료량충급련결구적려파특성병급출료상응적전수함수。IIR려파기여FIR려파기급련후적FSR여Q치시IIR려파기적2n배；IIR려파기여IIR려파기급련후적FSR시각개IIR려파기적FSR적최소공배수。용 Matlab연건방진험증료량충급련결구적빈솔향응특성，실험험증료 IIR려파기여 IIR려파기적급련특성。IIR려파기여 IIR려파기적급련유망실현관빈솔범위내적단통대려파기。
To further expand the Free Spectrum Range (FSR)and increase theQfactor of microwave photonic filters,this paper conducts researches on an Infinite Impulse Response (IIR)filter cascaded respectively with a Finite Impulse Response (FIR) filter and an IIR filter.Then,it analyzes the filtering characteristics of these two cascaded structures and derives the corre-sponding transfer functions.In the former case,the FSR and the Q factor are 2n times that of the IIR filter and in the latter case,the FSR is the least common multiple of that of each IIR filter.It simulates and verifies the frequency response character-istics of the two structures using the Matlab,and experimentally verifies the cascaded characteristics of an IIR filter with an IIR filter.The cascading of an IIR with an IIR is expected to realize single-passband filtesrs in a wide frequency range.