针对单边带微波光传输应用要求，提出并研究了一种基于集成光波导微环谐振器与马赫曾德尔干涉仪相结合的可调谐微波光子滤波器。分析了滤波器结构参数，包括耦合系数κr、周损耗因子γ1、附加相移Δφ1等对滤波响应特性的影响。结果表明滤波曲线的矩形度和消光比存在相互制约的关系。基于聚合物液态聚倍半硅氧烷(PSQ-L)波导，设计出矩形度为0.8、消光比为32 dB的微波光子滤波器，通过电极热光调相该滤波器可以实现8~69 GHz范围内的可调谐射频单边带滤波功能。

A new tunable microwave photonic filter combining optical waveguide micro-ring resonator and Mach-Zehnder interferometer (MZI) is proposed to realize single sideband filtering. The influences of the filter structural parameters, such as coupling coefficient κr, round-trip loss γ1 and additional phase shift Δφ1, etc., on the filtering response are investigated. The result shows that there is a tradeoff between the rectangle shape and extinction ratio. According to the polymer polysilsesquioxane-liquid (PSQ-L) waveguide, a microwave photonic filter with rectangle shape factor of 0.8 and extinction ratio of 32 dB is designed, and the tunable radio frequency single sideband filtering from 8 GHz to 69 GHz can be achieved with the thermal-optic phase shifters.