tuned radio-frequency receiver

简明释义

调谐式射频接收机

英英释义

例句

1.Scientists use a tuned radio-frequency receiver to analyze signals from distant galaxies.

科学家们使用调谐射频接收器来分析来自遥远星系的信号。

2.The tuned radio-frequency receiver in this device enhances the clarity of the audio output.

该设备中的调谐射频接收器增强了音频输出的清晰度。

3.The tuned radio-frequency receiver allows users to listen to specific frequencies without interference.

该调谐射频接收器允许用户无干扰地收听特定频率。

4.In amateur radio, a tuned radio-frequency receiver is essential for clear communication.

在业余无线电中，调谐射频接收器对于清晰的通信至关重要。

5.The engineer designed a highly sensitive tuned radio-frequency receiver to capture weak signals from space.

工程师设计了一款高度灵敏的调谐射频接收器，以捕捉来自太空的微弱信号。

作文

In the world of communication technology, one of the most fascinating devices is the tuned radio-frequency receiver. This device plays a crucial role in the reception of radio signals, allowing us to enjoy various forms of media, including music, news, and entertainment. Understanding how a tuned radio-frequency receiver works is essential for anyone interested in electronics or telecommunications.The basic principle behind a tuned radio-frequency receiver lies in its ability to isolate a specific frequency from a range of frequencies. When radio waves are transmitted, they carry information through electromagnetic waves. These waves can be found at different frequencies, and a tuned receiver must be able to select the desired frequency while filtering out all others. This process is achieved through a combination of components such as antennas, filters, and amplifiers.At the heart of a tuned radio-frequency receiver is the tuner. The tuner is responsible for adjusting the receiver to the desired frequency. When you turn the dial on your radio, you are essentially tuning the receiver to pick up a specific station. This is done by varying the capacitance or inductance in the circuit, which changes the resonant frequency of the receiver. Once the desired frequency is tuned in, the receiver can amplify the signal for clearer sound.Moreover, the tuned radio-frequency receiver employs filters to eliminate unwanted signals. These filters are designed to allow only a narrow band of frequencies to pass through while blocking others that may cause interference. This capability is vital in ensuring that the audio output is clear and free from noise. Without effective filtering, we would hear a jumble of static and overlapping signals rather than the intended broadcast.Another important aspect of a tuned radio-frequency receiver is its ability to demodulate the received signal. Demodulation is the process of extracting the original information from the modulated carrier wave. In simple terms, it allows us to convert the radio waves back into sound waves that we can hear. There are various methods of demodulation, including amplitude modulation (AM) and frequency modulation (FM), each suited for different types of broadcasts.The evolution of the tuned radio-frequency receiver has been remarkable. From the early crystal radios to modern digital receivers, technology has significantly enhanced our listening experience. Today’s receivers often come equipped with advanced features such as digital signal processing (DSP), which further improves sound quality and reception reliability.In conclusion, the tuned radio-frequency receiver is an essential component of modern communication systems. Its ability to tune into specific frequencies, filter out noise, and demodulate signals allows us to enjoy a wide array of audio content. As technology continues to advance, we can expect even more sophisticated versions of this device, making our listening experiences richer and more enjoyable. Understanding the workings of a tuned radio-frequency receiver not only deepens our appreciation for radio technology but also highlights the intricate processes involved in the transmission and reception of information over the airwaves.

在通信技术的世界中，最吸引人的设备之一就是调谐无线电频率接收器。该设备在接收无线电信号方面发挥着至关重要的作用，使我们能够享受各种媒体形式，包括音乐、新闻和娱乐。了解调谐无线电频率接收器的工作原理对于任何对电子或电信感兴趣的人来说都是必不可少的。调谐无线电频率接收器的基本原理在于其能够从一系列频率中隔离特定频率。当无线电波被传输时，它们通过电磁波携带信息。这些波可以在不同的频率上找到，而调谐接收器必须能够选择所需的频率，同时过滤掉其他所有频率。这个过程是通过天线、滤波器和放大器等组件的组合来实现的。在调谐无线电频率接收器的核心是调谐器。调谐器负责将接收器调整到所需的频率。当你在收音机上转动旋钮时，你实际上是在调谐接收器，以便接收特定的电台。这是通过改变电路中的电容或电感来实现的，从而改变接收器的共振频率。一旦调谐到所需频率，接收器就可以放大信号以获得更清晰的声音。此外，调谐无线电频率接收器使用滤波器来消除不必要的信号。这些滤波器旨在允许仅通过一小段频率，同时阻止可能导致干扰的其他频率。这种能力对于确保音频输出清晰且无噪声至关重要。如果没有有效的滤波，我们将听到杂乱的静电和重叠的信号，而不是预期的广播。调谐无线电频率接收器的另一个重要方面是其解调接收到的信号的能力。解调是从调制载波波形中提取原始信息的过程。简单来说，它使我们能够将无线电波转换回我们可以听到的声波。有多种解调方法，包括幅度调制（AM）和频率调制（FM），每种方法适用于不同类型的广播。调谐无线电频率接收器的演变是显著的。从早期的晶体收音机到现代数字接收器，技术极大地增强了我们的听觉体验。如今的接收器通常配备先进的功能，如数字信号处理（DSP），进一步改善音质和接收可靠性。总之，调谐无线电频率接收器是现代通信系统的重要组成部分。它调谐特定频率、过滤噪声和解调信号的能力使我们能够享受丰富的音频内容。随着技术的不断进步，我们可以期待这种设备的更复杂版本，使我们的听觉体验更加丰富和愉悦。理解调谐无线电频率接收器的工作原理不仅加深了我们对无线电技术的欣赏，也突显了在空中传播和接收信息过程中涉及的复杂过程。