noise figure

简明释义

噪声因数

英英释义

例句

1.A low noise figure indicates that the device adds minimal noise to the signal.

低噪声系数表明设备对信号增加的噪声最小。

2.The receiver's noise figure is critical for ensuring clear communication in radio systems.

接收器的噪声系数对于确保无线电系统中的清晰通信至关重要。

3.In satellite communications, a high noise figure can severely impact the quality of the received signal.

在卫星通信中，高噪声系数会严重影响接收信号的质量。

4.The noise figure of the front-end receiver must be measured to ensure optimal system performance.

前端接收器的噪声系数必须进行测量，以确保系统性能最佳。

5.Engineers often strive to minimize the noise figure of their amplifiers to improve performance.

工程师们通常努力降低放大器的噪声系数以提高性能。

作文

In the field of electronics and telecommunications, understanding the concept of noise figure is crucial for designing efficient systems. The noise figure is a measure that quantifies how much noise a device adds to the signal it processes. It is defined as the ratio of the input signal-to-noise ratio (SNR) to the output SNR. Essentially, it tells engineers how much degradation occurs in the quality of the signal due to the inherent noise introduced by the components of the system.To grasp the significance of the noise figure, consider a radio receiver. When a weak radio signal is received, it is often accompanied by various types of noise from the environment and the receiver itself. The noise figure allows engineers to determine how well the receiver can amplify the desired signal without excessively amplifying the noise. A lower noise figure indicates better performance, meaning that the device introduces less noise into the system.The noise figure is usually expressed in decibels (dB), making it easier to compare different devices and their performances. For example, if one amplifier has a noise figure of 3 dB and another has a noise figure of 10 dB, the first amplifier is preferred for applications where signal integrity is paramount. This is especially important in communication systems where clarity and precision are essential for effective data transmission.Moreover, the noise figure is not only relevant for amplifiers but also for other components in a communication chain, such as mixers and filters. Each component contributes to the overall noise figure of the system, and thus, understanding each component's contribution is vital for optimizing the entire system's performance.Engineers often use simulation tools to analyze the noise figure of a complete system before physical implementation. By simulating the entire signal path, they can identify potential bottlenecks and areas where noise might be introduced. This proactive approach helps in designing more reliable and efficient systems.In practical scenarios, achieving a low noise figure can be challenging due to various factors, including temperature variations, component tolerances, and environmental conditions. Therefore, engineers must consider these factors during the design phase to ensure that the final product meets the required specifications.In conclusion, the noise figure is a fundamental concept in electronics that plays a pivotal role in the design and analysis of communication systems. By understanding and optimizing the noise figure, engineers can enhance the performance of devices, leading to clearer signals and better overall system efficiency. As technology continues to evolve, the importance of minimizing the noise figure will only increase, making it a critical area of focus for future innovations in telecommunications and electronics.

在电子和电信领域，理解“噪声系数”的概念对于设计高效系统至关重要。“噪声系数”是一个量度，用于量化设备在处理信号时增加了多少噪声。它被定义为输入信号与噪声比（SNR）与输出SNR的比率。基本上，它告诉工程师设备在系统中引入的固有噪声对信号质量造成了多少降解。为了理解“噪声系数”的重要性，可以考虑一个无线电接收器。当接收到微弱的无线电信号时，通常会伴随来自环境和接收器本身的各种噪声。“噪声系数”使工程师能够确定接收器在放大所需信号时，是否过度放大了噪声。较低的“噪声系数”表示更好的性能，这意味着设备在系统中引入的噪声较少。“噪声系数”通常以分贝（dB）表示，使比较不同设备及其性能变得更加容易。例如，如果一个放大器的“噪声系数”为3 dB，而另一个为10 dB，那么第一个放大器在信号完整性至关重要的应用中更受欢迎。这在通信系统中尤为重要，因为清晰度和精确性对有效数据传输至关重要。此外，“噪声系数”不仅与放大器相关，还与通信链中的其他组件有关，例如混频器和滤波器。每个组件都会对系统的整体“噪声系数”产生贡献，因此，了解每个组件的贡献对于优化整个系统的性能至关重要。工程师通常使用仿真工具在物理实现之前分析整个系统的“噪声系数”。通过模拟整个信号路径，他们可以识别潜在的瓶颈和噪声可能引入的区域。这种主动的方法有助于设计出更可靠和高效的系统。在实际场景中，由于温度变化、组件公差和环境条件等各种因素，实现低“噪声系数”可能具有挑战性。因此，工程师在设计阶段必须考虑这些因素，以确保最终产品满足所需的规格。总之，“噪声系数”是电子学中的一个基本概念，在通信系统的设计和分析中发挥着关键作用。通过理解和优化“噪声系数”，工程师可以提高设备的性能，从而实现更清晰的信号和更好的整体系统效率。随着技术的不断发展，降低“噪声系数”的重要性只会增加，使其成为未来电信和电子创新的关键关注领域。