With the continuous development of communication technology,the technical requirements of low insertion loss and high bandwidth are put forward for radio frequency(RF)front-end filters.In this paper,the main characteristics and advanced research progress of several RF front-end filters are reviewed,including cavity filters with large power capacity but large volume and ceramic filters with fast transmission speed but limited process.Surface acoustic wave(SAW)filters are small in size and low in power consumption but not suitable for high frequency.Film bulk acoustic resonator(FBAR)filter is the mainstream filter with good performance in all aspects but not suitable for high bandwidth.Laterally-excited bulk acoustic resonator(XBAR)filter is a relatively new filter suitable for high frequency and high bandwidth.The integrated passive device(IPD)filter can integrate a variety of passive components on a single substrate and is characterized by miniaturization and high integration.Low temperature cofired ceramic(LTCC)filters can build 3D integrated circuits for automotive and aerospace applications.Based on the current research results,FBAR filter is the most popular filter with the best comprehensive performance at present,and XBAR is a filter with great exploration value in the future.
communication technologyRF front-endfiltercomprehensive performance
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