Document Type : Original Article
Authors
1 Department of Physics, Faculty of science, Imam Hossein Comprehensive University: Tehran, IR . rrazavin@ihu.ac.ir
2 Department of Physics, Faculty of science , Imam Hossein Comprehensive University , Tehran, Iran
3 Department of Technology and Engineering, Faculty of advanced materials and nanotechnology, Imam Hossein Comprehensive University, Tehran, Iran.
4 Department of Physics, Faculty of Science, Imam Hossein Comprehensive University, Tehran, Iran
Abstract
The radar receiver protector is one of the important components in the radar system. It prevents the receiver from noise and powerful Electromagnetic wave. In this paper, the simulations are done for different structures of the radar receiver protector using COMSOL software in the X-band frequency.The simulation selected structure is based on the WR90 waveguide structure. In this simulation, parameters such as reflection and transmission coefficients, as well as the maximum field intensity created within different radar receiver protector structures, have been investigated. The studied structures include iris-diaphragms-pairs, posts-and-diaphragms, truncated-cones-and-diaphragms, Dumbell-pointed-post-tunable, Dumbell-pointed-post, and Dumbell structures.
The simulation results show that the internal structure of the waveguide has an important parameter on the filtration performance, the frequency selection and intensity modes created on the tips of the electrodes. Dumbell-pointed-posts-tunable among the investigated structures due to the frequency modes and high intensity of the electric field at the tip of the electrodes, it is superior to other structures.
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