radio horizon

简明释义

无线电地平线

英英释义

例句

1.We adjusted the frequency to improve the performance beyond the radio horizon 无线电视距 limits.

我们调整了频率，以提高超出 无线电视距 radio horizon 限制的性能。

2.The radio horizon 无线电视距 can vary based on the height of the transmitter and receiver.

根据发射机和接收机的高度，无线电视距 radio horizon 可能会有所不同。

3.For optimal signal strength, it's important to understand the radio horizon 无线电视距 when setting up antennas.

在安装天线时，了解 无线电视距 radio horizon 对于获得最佳信号强度是很重要的。

4.The technician explained that the radio horizon 无线电视距 limits the range of communication in hilly terrain.

技术人员解释说，在丘陵地形中，无线电视距 radio horizon 限制了通信的范围。

5.During the test, we found that the radio horizon 无线电视距 was significantly affected by the nearby mountains.

在测试期间，我们发现附近的山脉显著影响了 无线电视距 radio horizon。

作文

In the realm of telecommunications and radio communications, understanding the concept of radio horizon is crucial for effective signal transmission and reception. The term radio horizon refers to the maximum distance over which radio waves can be transmitted and received, taking into account the curvature of the Earth and other environmental factors. This phenomenon is particularly significant in situations where line-of-sight communication is essential, such as in broadcasting and satellite communications.The radio horizon is influenced by several factors, including the frequency of the radio waves, the height of the transmitting and receiving antennas, and the terrain between them. Higher frequencies tend to have shorter wavelengths, which can limit their range due to obstacles like buildings, trees, and hills. Conversely, lower frequencies can travel longer distances, but they may also be affected by atmospheric conditions such as ionospheric refraction.When calculating the radio horizon, one must consider the heights of both the transmitter and receiver antennas. A common formula used in this context is: Distance (in kilometers) = 3.57 * (√height of the antenna in meters), This formula illustrates that increasing the height of the antenna significantly enhances the radio horizon. For instance, a transmitting antenna at a height of 30 meters can extend its radio horizon to approximately 19.5 kilometers, while a 100-meter antenna can reach nearly 35.7 kilometers. This relationship highlights the importance of antenna placement in optimizing communication range.Moreover, the radio horizon can be affected by the environment. Urban areas with tall buildings can create shadows where signals are weak or nonexistent, while rural areas might offer clearer paths for radio waves. Understanding these dynamics is essential for engineers and technicians who design communication systems, as they must anticipate potential obstacles and adjust their equipment accordingly.In practical applications, the concept of radio horizon plays a significant role in various fields, including aviation, maritime navigation, and emergency services. For example, pilots rely on radio communication for air traffic control, and a clear radio horizon ensures that they receive critical information without disruption. Similarly, ships at sea depend on radio signals for navigation and safety, making it vital for their communication systems to operate within the effective radio horizon.As technology advances, new methods and technologies are being developed to extend the radio horizon. Techniques such as repeaters and satellite relays allow for greater coverage areas, overcoming some of the limitations imposed by the Earth's curvature and physical obstructions. These innovations are particularly important in remote or underserved regions, where establishing direct line-of-sight communication can be challenging.In conclusion, the concept of radio horizon is fundamental to understanding radio wave propagation and communication systems. By considering factors such as antenna height, frequency, and environmental conditions, engineers can optimize communication networks to ensure reliable signal transmission. As we continue to explore new technologies and methods to enhance our communication capabilities, the radio horizon will remain a key consideration in the design and implementation of effective communication systems.

在电信和无线电通信领域，理解无线电视距的概念对于有效的信号传输和接收至关重要。术语无线电视距指的是无线电波可以被传输和接收的最大距离，这一距离受到地球曲率和其他环境因素的影响。这一现象在需要视距通信的情况下尤为重要，例如广播和卫星通信。无线电视距受多个因素的影响，包括无线电波的频率、发射和接收天线的高度以及它们之间的地形。较高的频率往往具有较短的波长，这可能由于建筑物、树木和山丘等障碍物而限制其范围。相反，较低的频率可以传播更远的距离，但也可能受到电离层折射等大气条件的影响。在计算无线电视距时，必须考虑发射天线和接收天线的高度。一个常用的公式是：距离（公里）= 3.57 * （√天线高度（米）），这个公式说明了增加天线高度显著增强了无线电视距。例如，30米高的发射天线可以将其无线电视距扩展到约19.5公里，而100米高的天线可以达到近35.7公里。这种关系突显了天线位置在优化通信范围中的重要性。此外，无线电视距还会受到环境的影响。城市地区的高楼大厦可能造成信号弱或不存在的阴影，而农村地区可能提供更清晰的无线电波传播路径。理解这些动态对设计通信系统的工程师和技术人员至关重要，因为他们必须预见潜在的障碍，并相应地调整他们的设备。在实际应用中，无线电视距的概念在航空、海事导航和紧急服务等多个领域发挥着重要作用。例如，飞行员依赖无线电通信与空中交通控制进行联系，清晰的无线电视距确保他们能够不间断地接收关键信息。同样，海上的船只依靠无线电信号进行导航和安全，因此确保其通信系统在有效的无线电视距内运行至关重要。随着技术的进步，新的方法和技术正在开发，以扩展无线电视距。例如，使用中继器和卫星中继可以实现更大的覆盖区域，克服地球曲率和物理障碍带来的一些限制。这些创新在偏远或服务不足的地区尤为重要，在这些地方建立直接视距通信可能具有挑战性。总之，无线电视距的概念对于理解无线电波传播和通信系统至关重要。通过考虑天线高度、频率和环境条件等因素，工程师可以优化通信网络，以确保可靠的信号传输。随着我们继续探索新技术和方法以增强我们的通信能力，无线电视距将始终是设计和实施有效通信系统时的重要考虑因素。