一种带有TE01;模介质谐振器的双工器设计

The Design of Duplexer with TE01;Mode Dielectric Resonator

随着无线通讯的发展,对无线通讯终端小型化的要求越来越高[1]。介质双工器与传统金属腔体器件相比,体积小、插损低、谐振频率的温度稳定性好。因为电磁波在高介质常数的物质里传播时,其波长可以缩短[2],而TE01δ模介质材料制作的谐振器介电常数高,所以其体积可以做到轴谐振器或者空腔波导的1/10以下。此外,介质材料谐振器频率的选择性高,适合用于窄带双工器的制造。文章提出了一种TE01δ模介质谐振器与传统金属镀银谐振器同时使用的双工器设计方案,并重点描述了使用TE01δ模介质谐振器的发送端滤波器设计方法。该方案既考虑到窄带滤波器的传输特性,在发送通路使用了TE01δ模介质谐振器减小了双工器体积与重量,又在接受通路使用金属镀银谐振器的滤波器以控制产品性能与成本。该方案在工程应用与产品过渡方面具有参考意义,顺应了无线通信系统高性能化、小体积化的发展趋势。

Compared to the traditional metal cavity device,duplexer with TE01;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 TE01;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 TE01;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.