1. An ultra-thin, low-RCS, dual-bandpass novel fractal-FSS for planar/conformal C&X bands applications.
- Author
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Solunke, Yogesh and Kothari, Ashwin
- Subjects
- *
FRACTALS , *ANECHOIC chambers , *BREWSTER'S angle , *GOLDEN ratio , *FREQUENCY selective surfaces - Abstract
In this paper, the authors introduce a novel fractal-frequency selective surface (F-FSS) geometry for dual-bandpass applications. The centriole-symmetric geometry and dual-band characteristics have been achieved by introducing a golden ratio-based fractal geometry. The characteristic mode and equivalent circuit model analysis of the proposed geometry have been performed. The design offers significant autonomy in controlling the two resonant frequencies separately. Additionally, it demonstrates robust stability against variations in bending angle and polarization. To verify the concept, 7 × 7 array with a dimension of 0. 51 λ 0 × 0. 51 λ 0 × 0. 02 λ 0 (where the free-space wavelength (λ 0) is 39. 20 mm) is simulated, fabricated, and tested in an anechoic chamber. In measurement, the proposed F-FSS geometry achieves notches at 7.74 and 11.80 GHz, with fractional bandwidth of 6.10% and 3.90%, respectively. The design showcases a thickness-bandwidth ratio (T-BR) of 0.62 and 1.54 within their respective frequency bands. The measured results match closely with the simulation results and yield a low RCS value. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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