superhet receiver

简明释义

超外差接收机

英英释义

例句

1.Many amateur radio operators prefer a superhet receiver for its superior sensitivity.

许多业余无线电操作员更喜欢使用超外差接收机，因为它的灵敏度更高。

2.When troubleshooting a radio, checking the superhet receiver stages can help identify issues.

在排查收音机故障时，检查超外差接收机的各个阶段可以帮助识别问题。

3.The superhet receiver is widely used in modern radios due to its ability to filter out unwanted frequencies.

由于能够过滤掉不需要的频率，超外差接收机在现代收音机中被广泛使用。

4.In the design of a superhet receiver, the local oscillator plays a crucial role in mixing signals.

超外差接收机的设计中，本振在混频信号中起着关键作用。

5.The superhet receiver architecture allows for better selectivity and image rejection.

超外差接收机架构允许更好的选择性和图像抑制。

作文

In the world of radio communication, the term superhet receiver refers to a type of radio receiver that is widely used for its efficiency and effectiveness in receiving signals. The name 'superhet' is derived from 'superheterodyne,' which describes the method by which these receivers operate. This technology was first developed in the early 20th century and has since become a standard in both commercial and amateur radio systems.The fundamental principle behind a superhet receiver involves mixing the incoming radio frequency signal with a signal generated by a local oscillator. This process creates an intermediate frequency (IF) that is easier to process than the original radio frequency. By converting the incoming signal to a lower frequency, the receiver can more effectively filter and amplify the desired signals while minimizing noise and interference.One of the significant advantages of using a superhet receiver is its ability to select and isolate specific frequencies. This capability is crucial in environments where multiple signals are present, as it allows the user to tune into a particular station without being overwhelmed by other broadcasts. The design of the superhet receiver typically includes various stages of amplification and filtering, which enhance the clarity and quality of the received audio.Moreover, the superhet receiver architecture can be easily adapted for various applications. For instance, it is commonly found in AM and FM radio receivers, television sets, and even in some types of digital communication devices. Its versatility makes it a popular choice among engineers and hobbyists alike.Another interesting aspect of the superhet receiver is its historical significance. When it was first introduced, this technology revolutionized the way radio signals were received and processed. Prior to the development of the superheterodyne method, radio receivers were less effective at tuning into specific frequencies, often resulting in poor sound quality and reception issues. The advent of the superhet receiver marked a turning point in radio technology, paving the way for clearer and more reliable communication.As technology continues to advance, the basic principles of the superhet receiver remain relevant. Modern innovations have led to the development of software-defined radios (SDRs), which utilize digital signal processing techniques to emulate the functions of traditional receivers, including the superheterodyne method. While the implementation may differ, the core concepts of frequency mixing and signal processing persist, demonstrating the enduring legacy of the superhet receiver in the field of radio communications.In conclusion, the superhet receiver is an essential component of modern radio technology, characterized by its unique method of signal processing that enhances the reception of radio waves. Its invention not only improved the quality of radio communication but also laid the groundwork for further advancements in the field. Understanding the principles behind the superhet receiver allows us to appreciate its impact on the way we communicate today. As we continue to explore new technologies, the influence of the superhet receiver will undoubtedly be felt for years to come.

在无线电通信的世界中，术语超外差接收机指的是一种广泛用于接收信号的高效和有效的无线电接收机。‘超外差’这个名字源于‘超外差波’，它描述了这些接收机的工作方式。这项技术是在20世纪初首次开发的，至今已成为商业和业余无线电系统的标准。超外差接收机的基本原理涉及将接收到的无线电频率信号与本地振荡器生成的信号混合。这个过程产生了一个中频（IF），它比原始无线电频率更容易处理。通过将接收到的信号转换为较低的频率，接收机可以更有效地过滤和放大所需信号，同时最小化噪声和干扰。使用超外差接收机的一个显著优势是其选择和隔离特定频率的能力。这种能力在多个信号存在的环境中至关重要，因为它允许用户调谐到特定的电台，而不会被其他广播淹没。超外差接收机的设计通常包括多个放大和过滤阶段，这增强了接收到的音频的清晰度和质量。此外，超外差接收机架构可以轻松适应各种应用。例如，它通常出现在AM和FM无线电接收机、电视机，甚至某些类型的数字通信设备中。其多功能性使其成为工程师和爱好者的热门选择。另一个有趣的方面是超外差接收机的历史意义。当它首次被引入时，这项技术彻底改变了无线电信号的接收和处理方式。在超外差方法的发展之前，无线电接收机在调谐特定频率方面的效果较差，往往导致声音质量差和接收问题。超外差接收机的出现标志着无线电技术的转折点，为更清晰和更可靠的通信铺平了道路。随着技术的不断进步，超外差接收机的基本原理仍然相关。现代创新导致了软件定义无线电（SDR）的发展，利用数字信号处理技术来模拟传统接收机的功能，包括超外差方法。尽管实现方式可能有所不同，但频率混合和信号处理的核心概念依然存在，证明了超外差接收机在无线电通信领域的持久遗产。总之，超外差接收机是现代无线电技术的重要组成部分，其独特的信号处理方法增强了无线电波的接收。它的发明不仅改善了无线电通信的质量，也为该领域的进一步发展奠定了基础。理解超外差接收机背后的原理使我们能够欣赏它对我们今天沟通方式的影响。随着我们继续探索新技术，超外差接收机的影响无疑将在未来几年内继续感受到。