概括
我们开发了一个可调节的微波光子波器,使用微波振器. 该设备实现了宽频调和快速响应,使先进的雷达和无线通信系统成为可能.
科学领域:
- 光子学是指光子学的使用方法.
- 微波工程 微波工程
- 光学通信是指光学通信.
背景情况:
- 微波光子过器对于现代无线系统至关重要.
- 现有的过器在频率,速度和带宽方面往往缺乏调整性.
- 在芯片上的共振器提供了小型化和增强的性能.
研究的目的:
- 提出和演示一个完全可调节的微波光子窄带通波器.
- 为了利用相位调制到强度调制 (PM-IM) 转换来实现波器功能.
- 为了实现宽频调节范围,快速调节速度和可调节的带宽.
主要方法:
- 使用了芯片上的双驱动微波振器 (MRR),并配备了多模波导以实现高Q系数.
- 集成了一个金属微型加热器和一个侧面PN连接点,用于同时调节共振波长.
- 采用两种不同的调机制 (范围为加热器,速度为PN连接器) 来实现组合性能.
- 设计,制造和评估了一种基于的双驱动高Q赛道MRR芯片.
主要成果:
- 展示了一个带宽为1.27GHz的窄带宽过器.
- 实现了从3到51 GHz的超宽频率调范围.
- 显示的超快调速度小于0.54 ns.
- 展示了一个可调节的带宽从1.27到4.47 GHz.
结论:
- 开发的过器在频率,速度和带宽方面完全可调节.
- 双调节机制有效地提高了波器的性能.
- 这项技术对未来的雷达和下一代无线通信应用具有重大潜力.
相关概念视频
01:27Passive Filters
521
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...
521
01:23Parallel Resonance
187
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:
187
01:25Active Filters
783
Active filters are electronic circuits that use operational amplifiers (op-amps), resistors, and capacitors to filter out unwanted frequency components from a signal. A first-order low-pass active filter is designed to pass signals with a frequency lower than a certain cutoff frequency and attenuate frequencies higher than that cutoff frequency. The transfer function for a first-order low-pass active filter is:
783
01:24Characteristics of Series Resonant Circuit
225
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:
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