lowest useful frequency

简明释义

最低使用频率

英英释义

例句

1.Understanding the lowest useful frequency 最低有效频率 helps in designing better antennas.

理解最低有效频率最低有效频率有助于设计更好的天线。

2.For effective underwater communication, we must consider the lowest useful frequency 最低有效频率 of the sonar equipment.

为了有效的水下通信，我们必须考虑声纳设备的最低有效频率最低有效频率。

3.In radar systems, the lowest useful frequency 最低有效频率 can affect target detection capabilities.

在雷达系统中，最低有效频率最低有效频率会影响目标检测能力。

4.The lowest useful frequency 最低有效频率 for broadcasting in this region is set to 100 MHz.

该地区广播的最低有效频率最低有效频率设定为100 MHz。

5.The engineer determined that the lowest useful frequency 最低有效频率 for this communication system is 30 kHz.

工程师确定该通信系统的最低有效频率最低有效频率是30kHz。

作文

The concept of lowest useful frequency is essential in the field of radio communications and signal processing. It refers to the lowest frequency at which a communication system can effectively transmit and receive signals without significant loss of information. Understanding this concept is crucial for engineers and technicians who design and operate communication systems, as it directly impacts the quality and reliability of the transmitted signals.In radio communications, different frequencies have different propagation characteristics. For instance, lower frequencies tend to travel longer distances and can penetrate through obstacles better than higher frequencies. However, they also come with limitations, such as reduced bandwidth and lower data transmission rates. This is where the lowest useful frequency comes into play. It helps determine the optimal frequency range for specific applications, ensuring that the communication system operates efficiently.For example, in emergency services, the lowest useful frequency is critical for establishing reliable communication during disasters. First responders must be able to communicate over long distances and through various terrains. By selecting a frequency that meets the lowest useful frequency criteria, they can ensure that their messages are transmitted clearly and received without distortion.Moreover, the lowest useful frequency is not only important for voice communication but also for data transmission. In modern telecommunications, data is often sent over radio waves, and the frequency selection can significantly affect the data transfer rates. Engineers must carefully analyze the lowest useful frequency to maximize the efficiency of data transmission while minimizing interference and signal degradation.In addition to practical applications, understanding the lowest useful frequency has theoretical implications as well. It involves concepts from physics and engineering, including wave propagation, modulation techniques, and signal-to-noise ratios. By studying these principles, students and professionals can gain a deeper appreciation for how communication systems function and the challenges they face.In conclusion, the lowest useful frequency is a foundational concept in radio communications that influences both the design and operation of communication systems. Its significance extends beyond technical specifications; it plays a vital role in ensuring effective communication in various fields, from emergency services to everyday telecommunications. As technology continues to evolve, the understanding and application of the lowest useful frequency will remain crucial for advancing communication capabilities and enhancing the overall effectiveness of information exchange.

最低有用频率的概念在无线通信和信号处理领域至关重要。它指的是一个通信系统能够有效传输和接收信号而不会显著丧失信息的最低频率。理解这个概念对于设计和操作通信系统的工程师和技术人员来说至关重要，因为它直接影响到传输信号的质量和可靠性。在无线通信中，不同的频率具有不同的传播特性。例如，较低的频率往往可以传输更长的距离，并且能够更好地穿透障碍物。然而，它们也有一些局限性，比如带宽减少和数据传输速率降低。这就是最低有用频率发挥作用的地方。它帮助确定特定应用的最佳频率范围，确保通信系统高效运作。例如，在紧急服务中，最低有用频率对于在灾难期间建立可靠通信至关重要。第一响应者必须能够在长距离和各种地形中进行通信。通过选择满足最低有用频率标准的频率，他们可以确保他们的信息清晰传输且无失真地接收。此外，最低有用频率不仅对语音通信重要，也对数据传输至关重要。在现代电信中，数据通常通过无线电波发送，而频率的选择会显著影响数据传输速率。工程师必须仔细分析最低有用频率，以最大化数据传输的效率，同时最小化干扰和信号退化。除了实际应用，理解最低有用频率也具有理论意义。它涉及物理学和工程学的一些概念，包括波传播、调制技术和信噪比。通过研究这些原理，学生和专业人员可以更深入地认识通信系统的功能及其面临的挑战。总之，最低有用频率是无线通信中的基础概念，影响着通信系统的设计和操作。它的重要性超越了技术规范；在紧急服务到日常电信等各个领域，它在确保有效沟通方面发挥着重要作用。随着技术的不断发展，理解和应用最低有用频率将继续对提升通信能力和增强信息交流的整体有效性至关重要。