Microwave photonic filters are photonic subsystems designed with the aim of carrying equivalent tasks to those of an ordinary microwave filter within a radio frequency(RF)system or link,bringing supplementary advantages inherent to photonics such as low loss,high bandwidth,immunity to electromagnetic interference(EMI),tunability,and reconfigurability.There is an increasing interest in this subject since,on one hand,emerg-ing broadband wireless access networks and standards spanning from universal mobile telecommunications system(UMTS)to fixed access picocellular networks and including wireless local area network(WLAN),World Interoperability for Microwave Ac-cess,Inc.(WIMAX),local multipoint distribution service(LMDS), xZ