A novel polarization converter based on the band-stop frequency selective surface |
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| Authors: | Kun Liao Shining Sun Xinyuan Zheng Xianxian Shao Xiangkun Kong Shaobin Liu |
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| Affiliation: | 1.College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;2.Aviation Key Laboratory of Science and Technology on High Performance Electromagnetic Windows, Jinan 250023, China;3.Pingxiang Health Vocational College, Pingxiang 337006, China |
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| Abstract: | A dual-passband single-polarized converter based on the band-stop frequency selective surface (FSS) with a low radar cross-section (RCS) is designed in this article. The unit cell of the proposed converter is formed by a polarization layer attached to the band-stop frequency selective surface. The simulation results reveal that the co-polarization reflection coefficients below -10 dB are achieved in 3.82-13.64 GHz with a 112.4% fractional bandwidth (the ratio of the signal bandwidth to the central frequency). Meanwhile, a polarization conversion band is realized from 8.14 GHz to 9.27 GHz with a polarization conversion ratio which is over 80%. Moreover, the 1 dB transmission window is obtained in two non-adjacent bands of 3.42-7.02 GHz and 10.04-13.91 GHz corresponding to the relative bandwidths of 68.9% and 32.3%, respectively. Furthermore, the radar cross-section of the designed structure can be reduced in the wideband from 2.28 GHz to 14 GHz, and the 10 dB RCS reduction in the range of 4.10-13.35 GHz is achieved. In addition, the equivalent circuit model of this converter is established, and the simulation results of the Advanced Design System (ADS) match well with those of CST Microwave Studio (CST). The archetype of the designed converter is manufactured and measured. The experiment results match the simulation results well, which proves the reliability of the simulation results. |
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| Keywords: | dual-passband single-polarized converter polarization radar cross-section (RCS) |
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