ultra shortwave

简明释义

超短波

英英释义

例句

1.The radio station broadcasts on an ultra shortwave frequency, allowing listeners to enjoy high-quality sound.

该广播电台在超短波频率上播出，让听众享受高质量的声音。

2.Many amateur radio enthusiasts prefer ultra shortwave for its ability to reach distant locations.

许多业余无线电爱好者更喜欢超短波，因为它能到达遥远的地方。

3.Using ultra shortwave frequencies can significantly reduce interference from other signals.

使用超短波频率可以显著减少来自其他信号的干扰。

4.The ultra shortwave technology is crucial for communication in remote areas where other signals may fail.

在其他信号可能失效的偏远地区，超短波技术是至关重要的通信工具。

5.The military relies on ultra shortwave radios for secure and reliable communications.

军方依赖超短波无线电进行安全可靠的通信。

作文

In today's rapidly evolving technological landscape, communication plays a pivotal role in connecting people across the globe. One of the fascinating aspects of communication technology is the use of different frequency bands, among which ultra shortwave (超短波) stands out. This frequency range, typically from 30 MHz to 300 MHz, has unique characteristics that make it suitable for various applications, particularly in broadcasting and amateur radio.The term ultra shortwave refers to a segment of the radio spectrum that is characterized by its ability to transmit signals over long distances with relatively low power. This is primarily due to the way ultra shortwave signals interact with the ionosphere, which allows them to be reflected back to the Earth. As a result, ultra shortwave frequencies can travel beyond the horizon, making them ideal for international communication.One of the most common uses of ultra shortwave is in FM radio broadcasting. The clarity and quality of sound provided by ultra shortwave frequencies have made them the preferred choice for radio stations around the world. Unlike AM radio, which can suffer from static and interference, ultra shortwave signals offer a more stable and higher fidelity listening experience. This has led to the widespread adoption of FM radio, allowing listeners to enjoy music, news, and entertainment without the disruptions often associated with lower frequency bands.Moreover, ultra shortwave is also extensively used in television broadcasting. The transition from analog to digital television has further enhanced the capabilities of ultra shortwave frequencies, enabling clearer picture quality and more channels for viewers. This shift has revolutionized the way we consume media, making it more accessible and enjoyable.In addition to commercial applications, ultra shortwave frequencies are popular among amateur radio enthusiasts. These hobbyists utilize ultra shortwave for personal communication, experimentation, and emergency preparedness. The ability to connect with others around the world using simple equipment is a significant draw for many, fostering a sense of community and collaboration among users.Furthermore, the role of ultra shortwave in emergency communications cannot be overstated. During natural disasters or other crises, reliable communication is crucial. Many emergency services and organizations rely on ultra shortwave frequencies to coordinate their efforts and provide assistance to those in need. The resilience of these frequencies in challenging conditions makes them an invaluable resource in times of crisis.Despite the advantages of ultra shortwave, there are challenges associated with its use. For instance, the increasing number of devices operating within this frequency range can lead to congestion and interference. Additionally, advancements in technology have introduced alternative communication methods, such as satellite and internet-based systems, which may overshadow traditional ultra shortwave applications.In conclusion, ultra shortwave represents a vital component of modern communication technology. Its unique properties enable a wide range of applications, from radio and television broadcasting to amateur radio and emergency services. As we continue to advance technologically, it is essential to recognize the enduring significance of ultra shortwave and its contributions to our interconnected world. Understanding and mastering this frequency band will undoubtedly remain important for future generations of communicators and innovators.

在当今迅速发展的技术环境中，通信在连接全球人民方面发挥着关键作用。通信技术的一个迷人方面是使用不同的频率范围，其中超短波（ultra shortwave）脱颖而出。这个频率范围通常从30 MHz到300 MHz，具有独特的特性，使其适用于各种应用，特别是在广播和业余无线电方面。术语超短波指的是一个电波频谱的细分，其特点是能够以相对较低的功率传输远距离信号。这主要是由于超短波信号与电离层的相互作用，使其能够反射回地球。因此，超短波频率可以超越地平线传播，非常适合国际通信。超短波最常见的用途之一是FM广播。超短波频率提供的清晰度和音质使其成为世界各地广播电台的首选。与AM广播相比，后者可能会受到静电和干扰的困扰，超短波信号提供了更稳定和高保真的收听体验。这导致FM广播的广泛采用，使听众能够享受音乐、新闻和娱乐，而不必担心低频带常常伴随的干扰。此外，超短波也被广泛用于电视广播。从模拟到数字电视的过渡进一步增强了超短波频率的能力，使观众能够享受更清晰的画质和更多的频道。这一转变彻底改变了我们消费媒体的方式，使其变得更加可及和愉悦。除了商业应用，超短波频率在业余无线电爱好者中也很受欢迎。这些爱好者利用超短波进行个人通信、实验和应急准备。能够使用简单的设备与世界各地的人联系，是许多人所吸引的重要因素，促进了用户之间的社区感和合作精神。此外，超短波在应急通信中的作用不可小觑。在自然灾害或其他危机情况下，可靠的通信至关重要。许多应急服务和组织依赖于超短波频率来协调他们的工作并为需要帮助的人提供支持。这些频率在困难条件下的韧性使其在危机时期成为无价的资源。尽管超短波有诸多优势，但其使用也面临挑战。例如，越来越多的设备在这一频率范围内运行，可能导致拥堵和干扰。此外，技术的进步引入了替代通信方式，例如卫星和基于互联网的系统，这可能会遮蔽传统的超短波应用。总之，超短波代表了现代通信技术的重要组成部分。其独特的属性使其能够广泛应用于从广播和电视到业余无线电和应急服务等多个领域。随着我们继续在技术上取得进步，认识到超短波的持久重要性及其对我们互联世界的贡献至关重要。理解和掌握这一频率范围无疑将对未来的通信者和创新者产生重要影响。