heterodyne reception

简明释义

外差接收

英英释义

例句

1.The satellite receiver uses heterodyne reception 外差接收 to decode signals transmitted from space.

卫星接收器使用heterodyne reception 外差接收 来解码从太空传输的信号。

2.The new communication system employs heterodyne reception 外差接收 to enhance data transmission rates.

新通信系统采用heterodyne reception 外差接收 来提高数据传输速率。

3.In our lab, we often utilize heterodyne reception 外差接收 to analyze weak signals from distant sources.

在我们的实验室中，我们经常利用heterodyne reception 外差接收 来分析来自遥远源的微弱信号。

4.During the workshop, participants learned how heterodyne reception 外差接收 can be applied in radar technology.

在研讨会上，参与者学习了如何将heterodyne reception 外差接收 应用于雷达技术。

5.The radio engineer explained that the key to improving signal clarity lies in using heterodyne reception 外差接收 techniques.

无线电工程师解释说，提高信号清晰度的关键在于使用heterodyne reception 外差接收 技术。

作文

The concept of heterodyne reception has revolutionized the field of telecommunications and radio technology. This technique, which involves mixing a received signal with a locally generated frequency, allows for the effective demodulation of signals that would otherwise be difficult to process. By employing heterodyne reception, engineers can convert high-frequency signals into lower frequencies that are easier to handle. This is particularly important in applications such as radio broadcasting, where signals must be transmitted over long distances without significant loss of quality.To understand heterodyne reception, it is essential to delve into the basic principles of wave interference. When two waves of different frequencies interact, they produce new frequencies through the process of mixing. The resulting wave contains components at both the sum and difference of the original frequencies. In radio receivers, this principle is harnessed to extract the information carried by radio waves. For instance, when a radio receiver captures a signal, it mixes this signal with a stable local oscillator frequency. The output is a new signal that is at an intermediate frequency (IF), which is much easier to amplify and process.One of the primary advantages of heterodyne reception is its ability to improve selectivity and sensitivity in radio receivers. Selectivity refers to the receiver's ability to isolate a specific signal from a multitude of other signals. By converting signals to an intermediate frequency, receivers can utilize more advanced filtering techniques to enhance the desired signal while suppressing unwanted ones. This capability is crucial in crowded frequency environments, such as urban areas where multiple broadcasts occur simultaneously.Moreover, heterodyne reception enhances the overall performance of communication systems. It allows for the use of high-frequency components that can carry more data. For example, in modern digital communication systems, high-frequency carriers can transmit vast amounts of information quickly and efficiently. By employing heterodyne reception, these systems can maintain signal integrity over long distances, ensuring that the information reaches its destination accurately.In addition to telecommunications, heterodyne reception finds applications in various fields including radar and spectroscopy. In radar systems, for instance, heterodyne reception is used to detect and analyze the properties of distant objects by measuring the frequency shifts caused by the Doppler effect. Similarly, in spectroscopy, this technique enables scientists to study the interaction of light with matter, providing insights into molecular structures and compositions.Despite its advantages, heterodyne reception also presents certain challenges. The need for a stable local oscillator is critical; any fluctuations can introduce noise and distort the received signal. Additionally, the design of the receiver must ensure that the mixing process does not lead to unwanted intermodulation products, which can complicate signal interpretation.In conclusion, heterodyne reception is a fundamental technique in modern communication systems that enhances the ability to receive and process signals. Its ability to improve selectivity and sensitivity makes it invaluable in various applications, from radio broadcasting to radar technology. As we continue to advance in the fields of telecommunications and signal processing, understanding and mastering heterodyne reception will remain essential for engineers and scientists alike. The ongoing evolution of this technology promises even greater efficiency and effectiveness in the way we communicate and understand the world around us.

“异频接收”这一概念彻底改变了电信和无线电技术领域。这种技术涉及将接收到的信号与本地生成的频率混合，从而有效解调原本难以处理的信号。通过采用“异频接收”，工程师能够将高频信号转换为更易处理的低频信号。这在无线电广播等应用中尤为重要，因为信号必须在长距离内传输而不会显著损失质量。要理解“异频接收”，需要深入了解波干涉的基本原理。当两种不同频率的波相互作用时，它们通过混合过程产生新频率。在无线电接收器中，这一原理被利用来提取无线电波携带的信息。例如，当无线电接收器捕获信号时，它将该信号与稳定的本地振荡器频率混合。输出是一个新的信号，处于中间频率（IF），这使得放大和处理变得更加容易。“异频接收”的主要优点之一是提高了无线电接收器的选择性和灵敏度。选择性是指接收器从众多信号中隔离特定信号的能力。通过将信号转换为中间频率，接收器可以利用更先进的滤波技术来增强所需信号，同时抑制不必要的信号。这种能力在拥挤的频率环境中至关重要，例如城市地区同时发生多次广播。此外，“异频接收”还增强了通信系统的整体性能。它允许使用高频组件，这些组件可以承载更多数据。例如，在现代数字通信系统中，高频载波可以快速高效地传输大量信息。通过采用“异频接收”，这些系统能够在长距离内保持信号完整性，确保信息准确到达目的地。除了电信外，“异频接收”还在雷达和光谱学等多个领域中找到应用。在雷达系统中，例如，“异频接收”用于通过测量多普勒效应引起的频率偏移来检测和分析遥远物体的特性。同样，在光谱学中，这一技术使科学家能够研究光与物质的相互作用，从而提供关于分子结构和成分的见解。尽管具有优势，“异频接收”也存在某些挑战。稳定的本地振荡器的需求至关重要；任何波动都可能引入噪声并扭曲接收到的信号。此外，接收器的设计必须确保混合过程不会导致不必要的互调产物，这可能会使信号解释变得复杂。总之，“异频接收”是现代通信系统中的一项基本技术，增强了接收和处理信号的能力。其提高选择性和灵敏度的能力使其在无线电广播到雷达技术等各种应用中不可或缺。随着我们在电信和信号处理领域的不断进步，理解和掌握“异频接收”将对工程师和科学家而言始终至关重要。这项技术的持续演变承诺在我们交流和理解周围世界的方式上实现更高的效率和有效性。