具有高角稳定性和极化不敏感性的双通带频率选择性表面
1The State Key Laboratory of Integrated Services Networks, Xidian University, Xi'an 710071, China.
Micromachines
|June 27, 2024
概括
一种新的双通带频率选择面 (FSS) 为 TE 和 TM 两种模式提供了在广角上稳定的传输. 这种极化不敏感的设计可以在双频应用中实现高性能.
科学领域:
- 电磁学和应用物理学
- 甲基材料和甲基表面.
- 微波工程 微波工程
背景情况:
- 频率选择性表面 (FSS) 对于过电磁波至关重要.
- 实现具有高角度稳定性和极化不敏感性的双通带特征仍然是一个挑战.
- 现有的FSS设计往往在形冲击角下与性能降低作斗争.
研究的目的:
- 提出和验证一种新的双通带频率选择面 (FSS).
- 为了证明设计的FSS的高角度稳定性和极化不敏感性.
- 为了在特定的微波频率上实现高效的双频段过.
主要方法:
- 设计了一个由圆形,环形和交叉口组成的单元结构.
- 进行了电磁模拟来分析FSS的性能.
- 进行实验测量以验证模拟结果.
主要成果:
- 设计的FSS在8.45GHz和12.76GHz时表现出双宽带特性.
- 插入损失在两个传输带都保持在1dB以下.
- 对于TE模式高达86°和TM模式高达83°,观察到稳定的传输.
- 在模拟和实验结果之间取得了很好的一致性.
结论:
- 拟议的FSS设计成功实现了双通带过,具有出色的角度稳定性和极化不敏感性.
- 演示的性能验证了拟议的单元结构对于先进的微波应用的可行性.
- 这项工作为在不同发生条件下需要双带频率选择的应用程序提供了强大的FSS设计.
相关概念视频
01:27Passive Filters
536
Passive filters are utilized to shape the frequency spectrum of signals across a diverse array of applications. These filters, using only passive elements like resistors (R), inductors (L), and capacitors (C), are capable of selectively allowing or blocking certain frequency ranges without the need for external power sources.
Low-Pass Filters
Low-pass filters are designed to transmit signals with frequencies lower than the cutoff frequency, ωc, and attenuate those above it. The cutoff...
Low-Pass Filters
Low-pass filters are designed to transmit signals with frequencies lower than the cutoff frequency, ωc, and attenuate those above it. The cutoff...
536
01:17Bandpass Sampling
171
In signal processing, bandpass sampling is an effective technique for sampling signals that have most of their energy concentrated within a narrow frequency band. This type of signal is known as a bandpass signal. The key principle of bandpass sampling involves sampling the signal at a rate that is greater than twice the signal's bandwidth to prevent aliasing.
A bandpass signal has a spectrum with a lower frequency limit, denoted as ω1, and an upper frequency limit, denoted as ω2....
A bandpass signal has a spectrum with a lower frequency limit, denoted as ω1, and an upper frequency limit, denoted as ω2....
171