Three-dimensional Time-domain Electromagnetic Simulation Software Testing And Its Application In Substrate Integrated Waveguide Filter Design

With the rapid development of modern communication systems and the rapid arrival of the 5G era,frequency band resources have become more scarce and signal interference has become more serious,when the traditional filter can no longer meet the requirements of the increasing miniaturization and high performance of the filter,and integrated waveguide filter due to the advantages of lightweight,low loss,etc.,in recent years has received the attention of the majority of researchers,and its rapid development has become a solution to the above problems.The rapid development of integrated waveguide filters has become a trend to solve the above problems.The researchers can simulate the design of integrated waveguide filter numerically by electromagnetic simulation software,which can replace the manual theoretical calculation and experimental derivation process,not only reduce the consumption of human and financial resources,but also greatly save the design cycle.After decades of development,a series of mature EM simulation software has been developed abroad,such as CST,HFSS,Altair Feko,etc.However,there are security risks in the supply chain of foreign EM simulation software,so that our information security can not be guaranteed and there is a risk of embargo.Therefore,self-developed electromagnetic simulation software is important for the development of domestic electromagnetic simulation software.In this thesis,the test work of the self-developed EM simulation software BUMBLEBEE 3D in integrated waveguide filter is carried out from the above research background,mainly including the design and verification of classical waveguide filter,dual-band integrated waveguide filter and X-band integrated waveguide filter.The details are as follows:1.The history of filter development and the domestic and international development of integrated waveguide filters are introduced,and the domestic and international development status of numerical simulation and simulation is investigated.2.The design and verification of classical filters are carried out.Firstly,the basic design principle of microwave filter is explained,and then a waveguide filter structure is selected and designed by including modeling and simulation in BUMBLEBEE 3D,and finally the simulation results are compared with CST for verification.The correctness of BUMBLEBEE 3D in conventional filter design is demonstrated.3.The design and verification of the integrated waveguide filter is divided into two steps: the first step introduces the equivalence theory and coupling matrix theory of the integrated waveguide filter,and then a dual-band integrated waveguide filter is selected to be designed in BUMBLEBEE 3D and compared with CST to verify the feasibility of BUMBLEBEE 3D in the integrated waveguide filter design;In the second step,an X-band integrated waveguide filter is designed using BUMBLEBEE 3D and CST.The design process mainly includes extraction of coupling matrix,single-cavity simulation,inter-cavity coupling,and overall optimization,etc.Finally,the results are compared and verified with CST to further prove the feasibility of BUMBLEBEE 3D in integrated waveguide filter design.