low-noise receiver

简明释义

低噪声接收机

英英释义

例句

1.Engineers are testing a low-noise receiver to improve the performance of the radar system.

工程师正在测试一种低噪声接收器以提高雷达系统的性能。

2.In radio astronomy, a low-noise receiver is essential for detecting faint signals from distant galaxies.

在射电天文学中，低噪声接收器对于探测来自遥远星系的微弱信号至关重要。

3.The satellite communication system employs a low-noise receiver to enhance signal clarity.

卫星通信系统采用了一个低噪声接收器以增强信号清晰度。

4.The new model of the wireless microphone features a built-in low-noise receiver for better audio quality.

这款新型无线麦克风配备了内置的低噪声接收器，以提高音频质量。

5.A low-noise receiver is critical in medical imaging technologies like MRI to reduce background noise.

在医学成像技术如MRI中，低噪声接收器对于减少背景噪声至关重要。

作文

In the realm of communications and signal processing, the term low-noise receiver refers to a specialized device designed to amplify weak signals while minimizing the addition of noise. This is crucial in various applications, including radio astronomy, telecommunications, and medical imaging. The primary objective of a low-noise receiver is to improve the quality of the received signal, ensuring that the information contained within it can be accurately extracted and interpreted.The importance of a low-noise receiver cannot be overstated. In many scenarios, the signals we wish to receive are often buried in a sea of noise. For instance, consider the case of a radio telescope trying to detect faint signals from distant galaxies. Without a low-noise receiver, these signals would be lost amidst the background noise of the universe. By using advanced technology to reduce the noise figure of the receiver, astronomers can capture these elusive signals and gain insights into the cosmos.In telecommunications, the role of a low-noise receiver is equally vital. Mobile phones and other communication devices rely on these receivers to ensure clear and reliable communication. When a call is made, the voice signals are transmitted over a network and received by the phone. If the receiver is not designed to minimize noise, the conversation may be distorted, leading to miscommunication. Therefore, manufacturers invest heavily in developing low-noise receivers that enhance the user experience by providing crisp and clear audio.Medical imaging technologies, such as MRI (Magnetic Resonance Imaging), also benefit significantly from low-noise receivers. In this context, the receiver captures signals emitted by hydrogen atoms in the body when exposed to a magnetic field. The challenge lies in distinguishing these signals from the noise generated by the imaging equipment itself. A low-noise receiver enhances the clarity of the images produced, allowing doctors to make more accurate diagnoses based on the scans.The design of a low-noise receiver involves several technical considerations. Engineers must carefully select components that contribute to a low noise figure, which is a measure of how much noise the receiver adds to the signal. This often includes the use of high-quality transistors, low-noise amplifiers, and effective shielding techniques to prevent external interference. The end result is a device that can operate effectively even in challenging environments, where noise levels are high.In conclusion, the low-noise receiver plays an indispensable role across various fields by enhancing signal integrity and ensuring accurate data transmission. Whether in the exploration of space, the facilitation of communication, or the advancement of medical technology, these receivers are essential for extracting valuable information from weak signals. As technology continues to evolve, the development of even more sophisticated low-noise receivers will likely lead to further advancements in these critical areas, paving the way for new discoveries and improved human experiences.

在通信和信号处理领域，术语低噪声接收器指的是一种专门设计的设备，旨在放大微弱信号，同时最小化噪声的增加。这在无线电天文学、电信和医学成像等各种应用中至关重要。低噪声接收器的主要目标是提高接收信号的质量，确保其中包含的信息能够被准确提取和解释。低噪声接收器的重要性不容小觑。在许多情况下，我们希望接收的信号常常淹没在噪声的海洋中。例如，考虑一个无线电望远镜试图探测来自遥远星系的微弱信号的情况。如果没有低噪声接收器，这些信号将会在宇宙的背景噪声中丢失。通过使用先进技术降低接收器的噪声系数，天文学家可以捕捉到这些难以捉摸的信号，从而获得对宇宙的深入了解。在电信领域，低噪声接收器的角色同样至关重要。手机和其他通信设备依赖这些接收器来确保清晰可靠的通信。当拨打电话时，声音信号通过网络传输并被手机接收。如果接收器未能有效减少噪声，通话可能会失真，导致误解。因此，制造商在开发低噪声接收器方面投入大量资金，以通过提供清晰的音频增强用户体验。医学成像技术，如MRI（磁共振成像），也极大受益于低噪声接收器。在这种情况下，接收器捕获在磁场下暴露的身体内氢原子发出的信号。挑战在于区分这些信号与成像设备本身产生的噪声。低噪声接收器提高了生成图像的清晰度，使医生能够根据扫描结果做出更准确的诊断。低噪声接收器的设计涉及几个技术考虑因素。工程师必须仔细选择有助于降低噪声系数的组件，这是一种衡量接收器对信号添加多少噪声的指标。这通常包括使用高质量的晶体管、低噪声放大器以及有效的屏蔽技术，以防止外部干扰。最终结果是，即使在噪声水平较高的挑战性环境中，也可以有效运行的设备。总之，低噪声接收器在各个领域中发挥着不可或缺的作用，通过增强信号完整性和确保准确的数据传输。无论是在太空探索、通信促进还是医学技术进步中，这些接收器对于从微弱信号中提取有价值的信息至关重要。随着技术的不断发展，甚至更复杂的低噪声接收器的发展可能会导致这些关键领域的进一步进展，为新的发现和改善人类体验铺平道路。