The design of duplexer with TE01δ mode dielectric resonator

Compared to the traditional metal cavity device, duplexer with TE_01δ mode dielectric resonator (DR) has more advantages such as smaller size, lower insertion loss (IL), better temperature stability of resonant frequency and so on. Based on microwave theory, this paper proposes a new type of duplexer which partly consists of TE_01δ mode DR. It takes full advantage of the performance of different materials to make it conform as closely as possible to the signal transmission characteristics of the different frequency bands and to optimize the quality of the transmission channel. The design of TE_01δ mode DR is presented at first of this paper. Then it gets the equivalent circuit of duplexer by formula deduction. The duplexer is simulated by using HFSS and CoupleFil software and it comes to conclusion that the test and the simulation results are consistent at last. In the fields of engineering of application, this design program can improve the performance and reduce the size of duplexer.