heterodyne receiver

简明释义

外差接收机

英英释义

例句

1.For amateur radio operators, a heterodyne receiver 外差接收机 allows them to tune into various frequencies with precision.

对于业余无线电爱好者来说，外差接收机使他们能够精确地调整到各种频率。

2.The engineer explained how the heterodyne receiver 外差接收机 converts radio signals into intermediate frequencies for easier processing.

工程师解释了外差接收机是如何将无线电信号转换为中频信号以便于处理的。

3.The design of a heterodyne receiver 外差接收机 includes multiple stages of amplification and filtering.

一个外差接收机的设计包括多个放大和过滤阶段。

4.The heterodyne receiver 外差接收机 used in radar systems enhances the detection of distant objects.

雷达系统中使用的外差接收机增强了对远处物体的探测。

5.In telecommunications, a heterodyne receiver 外差接收机 is essential for demodulating AM and FM signals.

在电信中，外差接收机对解调AM和FM信号至关重要。

作文

In the realm of telecommunications and signal processing, the term heterodyne receiver refers to a crucial device that plays a significant role in the reception and processing of radio signals. The basic principle behind a heterodyne receiver is to convert a high-frequency signal into a lower frequency, which is easier to process and analyze. This conversion is achieved through a technique known as heterodyning, where the incoming radio frequency (RF) signal is mixed with a locally generated signal from a local oscillator. The result of this mixing process is an intermediate frequency (IF) signal that contains the information of the original RF signal but at a much lower frequency.The architecture of a heterodyne receiver typically includes several key components: an antenna to capture the RF signals, a mixer to combine the RF signal with the local oscillator signal, and filters to isolate the desired IF signal. One of the primary advantages of using a heterodyne receiver is its ability to improve sensitivity and selectivity. By converting the signal to a lower frequency, it becomes easier to filter out unwanted noise and interference, allowing for clearer reception of the desired signal.Moreover, heterodyne receivers are widely used in various applications, including radio broadcasting, television, and radar systems. For instance, in radio communication, a heterodyne receiver can effectively demodulate amplitude modulation (AM) or frequency modulation (FM) signals, making it a versatile tool in the field of wireless communication. In radar technology, heterodyne receivers are essential for detecting and tracking objects by analyzing the reflected signals.The design and implementation of a heterodyne receiver can vary significantly depending on the specific application and frequency range. Engineers must consider factors such as dynamic range, bandwidth, and linearity when designing these devices. Advances in technology have led to the development of more compact and efficient heterodyne receivers, making them suitable for modern applications such as mobile communications and satellite systems.In conclusion, the heterodyne receiver is a fundamental component in modern communication systems. Its ability to convert high-frequency signals to lower frequencies enhances the quality and reliability of signal reception. As technology continues to evolve, the importance of heterodyne receivers in various fields will undoubtedly grow, paving the way for more advanced and efficient communication systems.

在电信和信号处理领域，术语异频接收机指的是一个至关重要的设备，它在无线电信号的接收和处理过程中发挥着重要作用。异频接收机的基本原理是将高频信号转换为较低频率，这样更易于处理和分析。这一转换是通过一种称为异频混合的技术实现的，即将接收到的射频（RF）信号与来自本地振荡器的本地生成信号混合。这个混合过程的结果是一个中频（IF）信号，它包含了原始RF信号的信息，但频率要低得多。异频接收机的架构通常包括几个关键组件：一个天线用于捕获RF信号，一个混频器用于将RF信号与本地振荡器信号结合，以及用于隔离所需IF信号的滤波器。使用异频接收机的主要优点之一是能够提高灵敏度和选择性。通过将信号转换为较低的频率，可以更容易地过滤掉不必要的噪声和干扰，从而实现对所需信号的更清晰接收。此外，异频接收机广泛应用于各种领域，包括广播、电视和雷达系统。例如，在无线电通信中，异频接收机可以有效解调调幅（AM）或调频（FM）信号，使其成为无线通信领域中的一种多功能工具。在雷达技术中，异频接收机对于通过分析反射信号来检测和跟踪物体至关重要。异频接收机的设计和实现可能因具体应用和频率范围而有很大差异。工程师在设计这些设备时必须考虑动态范围、带宽和线性度等因素。技术的进步导致了更紧凑和高效的异频接收机的开发，使其适合现代应用，如移动通信和卫星系统。总之，异频接收机是现代通信系统中的基本组成部分。它将高频信号转换为低频信号的能力增强了信号接收的质量和可靠性。随着技术的不断发展，异频接收机在各个领域的重要性无疑会增加，为更先进和高效的通信系统铺平道路。