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Updated: Sep 11, 2025

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基于单通道映射和图像拒绝混合的宽带微波测量

Yuzheng Jiang, Jing Li, Cheng Tian

|August 12, 2025

概括

本研究介绍了一种无镜微波光子系统,用于快速测量射频 (RF) 信号. 创新的设计实现了准确的宽带频率确定,误差最小,提高信号处理效率.

科学领域:

光子学是指光子学中的一个方面.
微波工程微波工程
信号处理信号处理

背景情况:

传统的射频信号测量技术可能因处理时间和复杂性而受到限制.
宽带频率测量需要复杂的接收器架构.

研究的目的:

提出和分析一种新的无波微波光子辅助频率测量方案.
以提高效率实现即时宽带射频信号测量.

主要方法:

使用单通道映射来减少信号处理时间.
采用带有上下分支的通道接收器用于光学频率 generation和单侧频段调制.
实现图像拒绝混合,以结合拍击频率和光线来确定信号范围.

主要成果:

模拟显示该方案可以测量从0到40 GHz的多频率和线性频率调制信号.
实验验证证证实测量误差小于25 MHz.

结论:

拟议的无波微波光子方案为宽带射频信号频率测量提供了一种高效准确的方法.
这种方法对各种微波和射频应用中的实时信号分析具有实际意义.

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相关概念视频

Bandpass Sampling

Bandpass Sampling

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....