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A Miniaturized FSS Using the Parallel LC Resonant with Angular Stability
Chao Sun1, Guangyi Heng2, Yuhang Zou2
1The National Key Laboratory of Complex Aviation System Simulation, Southeast China Institute of Electronic Technology, Chengdu 610036, China.
Sensors (Basel, Switzerland)
|August 28, 2025
Summary
This study introduces a compact, symmetrical frequency-selective surface (FSS) using LC parallel resonance. The optimized design enhances transmission efficiency for base stations, even at large angles.
Area of Science:
- Electromagnetics and Applied Physics
- Materials Science and Engineering
Background:
- Frequency-selective surfaces (FSS) are crucial for filtering electromagnetic waves.
- Optimizing FSS for miniaturization, large-angle performance, and multi-band compatibility remains a challenge.
Purpose of the Study:
- To design and validate a highly symmetrical, miniaturized FSS with enhanced high-frequency passband characteristics.
- To improve transmission efficiency under large-angle incidence for base station applications.
Main Methods:
- Utilized LC parallel resonance and meandered design optimization for miniaturization.
- Employed cell bending techniques and structural manipulation of effective capacitance.
- Investigated co-planar and hetero-planar configurations for resonance frequency shifting.
Main Results:
- Achieved reflection and transmission peaks at approximately 1.56 GHz and 1.94 GHz.
- Shifted reflection resonance frequency beyond 0.7 GHz while maintaining passband stability.
- Demonstrated stable transmission (gain reduction ≤ 1.2 dB) in the 1.71-2.2 GHz band for incidence angles up to 60°.
Conclusions:
- The proposed single-layer FSS offers a compact footprint (0.134λ × 0.134λ) and simple structure.
- The FSS exhibits stable angular response and enhanced single-polarization characteristics.
- The design shows significant potential for multi-band compatible and spatially efficient base station applications.
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