DESIGN AND SIMULATION OF A SLOTTED WAVEGUIDE ANTENNA FOR NAVAL RADAR
Abstract
Systems consisting of a slotted waveguide antenna on the narrow face of the waveguide and a reflector are widely used in naval and coastal radars. In order to obtain an antenna for coastal radar applications in the X band, the design of a system based on a slotted waveguide antenna in the horizontal plane and a reflector in the vertical plane is proposed. The design is done on both planes separately. For the design of the slotted waveguide, the traveling wave array design equations are used and a Taylor one-parameter amplitude distribution is assumed. The reflector is designed based on obtaining a half power beamwidth determined by the vertical plane. In both designs the Mathcad software is used. According to the analytical models, the results of the simulation of the final antenna in the HFSS software obtain a half power beamwidth in the vertical and horizontal plane of 260 and 0.60 respectively and secondary lobe levels of - 25 dB and -30 dB respectively. To reduce the cross polarization level, a grid filter with parallel conductive strips was designed, which reduced the cross polarization level to -41 dB. The final antenna gain is 31.051 dB.
INDEX TERMS: Cross Polarization filter, reflector, slot, slotted waveguide antenna, Taylor one-parameter.
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- 11/09/2025 (2)
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