概括
一种新型的极化不敏感带通波器使用分区布局加载方法减少S和X频段的雷达横截面 (RCS). 这种方法有效地降低了对形状结构的倒向散射,提高了隐形能力.
科学领域:
- 电磁兼容性 电磁兼容性
- 超材料和人造电磁材料.
背景情况:
- 合规结构和传输式窗户往往表现出不良的散射特征.
- 降低雷达横截面 (RCS) 对隐形应用至关重要.
- 与平面相比,曲的表面具有独特的散射挑战.
研究的目的:
- 提出一个极化不敏感的高传输带宽过器,具有低RCS.
- 为合规结构引入隔断布局加载方法.
- 为了在S和X频段实现显著的逆向RCS减少.
主要方法:
- 通过分析不同表面区域的辐射贡献,开发了一种隔断布局负荷方法.
- 相当电路理论被用来设计一个带通层.
- 整合了一个损耗层来增强吸收.
- 该结构适用于具有不同曲率的曲面.
主要成果:
- 在4-8 GHz实现了超过10dB (66.7%) 的逆向RCS降低.
- 在3.7-5.6GHz和9.1-12.5GHz范围内,已证明吸收率高于0.8.
- 在曲面上验证了有效的吸收和传输特性.
- 制造并测试了15×15细胞结构,显示模拟和实验结果之间的良好一致.
结论:
- 拟议的过器提供极化不敏感,高透射率和低RCS性能.
- 分区布局加载方法有效地抑制侧流和向后散射.
- 该结构在曲面上表现出多功能性,适合各种应用.
相关概念视频
01:24Characteristics of Series Resonant Circuit
250
Series resonance occurs in a circuit containing inductive (L), capacitive (C), and resistive (R) elements connected sequentially. At the resonance frequency, the inductive and capacitive reactances are equal in magnitude but opposite in sign, effectively canceling each other. This causes the circuit's impedance is minimal, primarily determined by the resistance R. The resonant frequency of an RLC circuit is defined as:
250
01:23Parallel Resonance
205
The parallel RLC circuit is an arrangement where the resistor (R), inductor (L), and capacitor (C) are all connected to the same nodes and, as a result, share the same voltage across them. The parallel RLC circuit is analyzed in terms of admittance (Y), which reflects the ease with which current can flow. The admittance is given by:
205