Naval radar system suffers with false target detection problem. The important role in the radar system is played by the waveguide antenna for target detection. To reduce the false target detection probability, gain of the waveguide antenna should be increased and cross polarization component should be reduced. Objective of this research is to get the optimum gain of the designed waveguide keeping cross polarization component low. In this research narrow wall of the waveguide is chosen to reveal the characteristics of the narrow wall waveguide for target detection in naval radar system. Inclined slots are etched in the narrow wall of the waveguide these narrow wall slots are extended to the broad wall by adding semi-circular cutting at the end of the. Semi-circular cuttings are added to the broad wall of the waveguide to increase the length required for resonant which helps in achieving high gain and reduces side lobe level by reducing cross polarization component. Simulation in High frequency software simulation version 15.0 and hardware models of WR 90 waveguide with inclined slots and cross polarization component are implemented and analysed. The results of the simulated structure are compared with the hardware experimental results. Gain of 26 dB is obtained in HFSS simulation software and Hardware experimental results provides the gain of 24.5 db.

海军雷达系统存在错误目标检测问题。用于目标检测的波导天线在雷达系统中发挥着重要作用。为降低错误目标检测概率，应增加波导天线的增益并减少交叉极化分量。本研究的目的是使设计的波导在保持低交叉偏振分量的情况下获得最佳增益。本研究选择窄壁波导来揭示窄壁波导在海军雷达系统目标检测中的特性。斜槽蚀刻在波导的窄壁上，这些窄壁槽通过在末端添加半圆形切割延伸到宽壁。半圆形切口被添加到波导的宽壁以增加谐振所需的长度，这有助于实现高增益并通过减少交叉极化分量来降低旁瓣水平。高频软件仿真15.0版的仿真和具有斜槽和交叉极化分量的WR 90波导硬件模型的实现和分析。将仿真结构的结果与硬件实验结果进行比较。在 HFSS 仿真软件中获得了 26 dB 的增益，硬件实验结果提供了 24.5 db 的增益。0 和 WR 90 带有斜槽和交叉极化分量的波导的硬件模型进行了实现和分析。将仿真结构的结果与硬件实验结果进行比较。在 HFSS 仿真软件中获得了 26 dB 的增益，硬件实验结果提供了 24.5 db 的增益。0 和 WR 90 带有斜槽和交叉极化分量的波导的硬件模型进行了实现和分析。将仿真结构的结果与硬件实验结果进行比较。在 HFSS 仿真软件中获得了 26 dB 的增益，硬件实验结果提供了 24.5 db 的增益。