A tunable stepped-impedance resonator using liquid crystal is demonstrated.Two resonant frequencies at 3.367 and 7.198 GHz are realized and can be continuously tuned by external applied voltages.Continuous tunable ran...A tunable stepped-impedance resonator using liquid crystal is demonstrated.Two resonant frequencies at 3.367 and 7.198 GHz are realized and can be continuously tuned by external applied voltages.Continuous tunable ranges of 52 and 210 MHz have been achieved at a particularly low driving voltage of 14 V,which shows good agreement with the simulation results.The voltage-induced hysteresis phenomenon is also investigated.This device also has a low insertion loss of-2.9 and-4 dB for the two resonant frequencies and the return losses are less than-21.5 dB.This work provides a new protocol to realize a tunable frequency for communication systems.展开更多
基金the National Natural Science Foundation of China(Nos.61704090 and 11904177)the Natural Science Foundation of Jiangsu Province,China(Nos.BK20170908 and BK20170903)+2 种基金the Natural Science Foundation of the Higher Education Institutions of Jiangsu Province,China(No.17KJA470005)the National and Local Joint Engineering Laboratory of RF Integration and Micro-Assembly Technology(No.KFJJ20180201)NUPTSF(Nos.NY217123 and NY217124)。
文摘A tunable stepped-impedance resonator using liquid crystal is demonstrated.Two resonant frequencies at 3.367 and 7.198 GHz are realized and can be continuously tuned by external applied voltages.Continuous tunable ranges of 52 and 210 MHz have been achieved at a particularly low driving voltage of 14 V,which shows good agreement with the simulation results.The voltage-induced hysteresis phenomenon is also investigated.This device also has a low insertion loss of-2.9 and-4 dB for the two resonant frequencies and the return losses are less than-21.5 dB.This work provides a new protocol to realize a tunable frequency for communication systems.
