低线毫米波元地面天线,带有增强带宽
1State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Haidian District, Beijing 100876, China.
Micromachines
|July 29, 2023
概括
一种新的低度超表面天线使用特征模式分析 (CMA) 和槽蚀刻技术实现宽带性能. 这种设计增强了带宽,并减少了毫米波应用的交叉极化.
科学领域:
- 电气工程 电气工程
- 电磁学 电磁学 电磁学 电磁学
- 天线理论天线理论
背景情况:
- 超表面天线具有独特的电磁性质.
- 低调天线对于紧的电子设备至关重要.
- 毫米波频率为天线设计带来了挑战.
研究的目的:
- 为毫米波应用提出一个低调的宽带超表面天线.
- 使用特征模式分析 (CMA) 进行天线设计和优化.
- 为了增强阻抗带宽和减少交叉极化.
主要方法:
- 特性模式分析 (CMA) 用于模式激发和优化.
- 具有不同尺寸的共平面补丁的设计.
- 在寄生和中间补丁上蚀刻槽,以引入新的共振模式并减轻交叉极化.
- 使用同轴探头直接食.
主要成果:
- 从30-38.58 GHz实现了25.02%的阻抗带宽.
- 在操作频段内,实现增益范围在8.35-11.3dB之间.
- 该天线具有紧的物理尺寸 (1.423×1.423×0.029λ0).
结论:
- 拟议的超表面天线有效地实现了低配置的宽带运行.
- CMA是指导这种天线的设计和优化的宝贵工具.
- 插槽蚀刻是一种有效的技术,可以提高带宽和改善极化特性.
相关概念视频
01:23Parallel Resonance
231
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:
231
01:28Standing Waves in a Cavity
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A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:
957