Design and Implementation of Frequency Calibration Device Used in Electrically Tunable Filter
LI Jian-qiang · Radio Engineering · 2010
It needs large amount of debugging and maintenance in an electrically tunable cavity filter to determine its center frequency.To solve this problem,an auxiliary device called frequency calibration unit(FCU)is designed.The design model and theoretical analysis of FCU are introduced,based on which the design scheme and specific implementation of FCU are obtained.The test results of a physical FCU circuit are given.By analyzing these results,it's validated that the FCU is appropriate for tuning the centre frequency of electrically tunable cavity filter.Currently,the FCU has been successfully applied.