directional antenna

简明释义

定向天线

英英释义

例句

1.The directional antenna is ideal for point-to-point communication between two buildings.

这个定向天线非常适合两栋建筑之间的点对点通信。

2.The directional antenna helped the amateur radio operator reach stations that were previously unreachable.

这个定向天线帮助业余无线电爱好者联系到以前无法到达的电台。

3.The technician installed a directional antenna to improve the signal quality for the home network.

技术人员安装了一个定向天线以提高家庭网络的信号质量。

4.To connect to the distant tower, we decided to use a high-gain directional antenna.

为了连接到远处的塔，我们决定使用一个高增益的定向天线。

5.Using a directional antenna can significantly enhance your Wi-Fi range in a large office space.

使用定向天线可以显著增强大型办公空间中的Wi-Fi范围。

作文

In today's world, communication technology plays a crucial role in connecting people and devices. One of the key components in enhancing communication is the use of antennas. Among the various types of antennas, the directional antenna (定向天线) stands out for its ability to focus signals in a specific direction. This characteristic makes it particularly useful in various applications, including telecommunications, broadcasting, and even amateur radio. The fundamental principle behind a directional antenna (定向天线) is its design, which allows it to transmit or receive signals more effectively in one direction while minimizing interference from other directions. This is achieved through the use of elements such as reflectors and directors that shape the radiation pattern of the antenna. As a result, a directional antenna (定向天线) can provide a stronger signal over longer distances compared to omnidirectional antennas, which radiate signals equally in all directions.One of the most common types of directional antennas (定向天线) is the Yagi-Uda antenna. This antenna consists of multiple elements, including a driven element, reflectors, and directors, which work together to create a highly directional beam. The Yagi antenna is widely used for television reception and amateur radio communications. Its ability to focus on a specific signal source makes it ideal for receiving weak signals from distant transmitters.Another popular type of directional antenna (定向天线) is the parabolic dish antenna. This antenna uses a curved reflector to collect and focus signals onto a single point where the receiving element is located. Parabolic antennas are commonly used in satellite communications and microwave transmissions. They offer high gain and can effectively capture signals from satellites orbiting the Earth, making them essential for modern communication systems.The advantages of using a directional antenna (定向天线) are numerous. For instance, by focusing the signal in a specific direction, these antennas can reduce noise and interference, leading to clearer communication. Additionally, they can extend the range of wireless communication by allowing signals to travel further without degradation. This feature is especially beneficial in rural areas where signal strength may be weak.However, there are also some challenges associated with directional antennas (定向天线). One of the main drawbacks is their limited coverage area. Unlike omnidirectional antennas, which can receive signals from all directions, directional antennas (定向天线) require precise alignment with the signal source. This means that if the source moves or changes position, the antenna may need to be adjusted to maintain optimal performance.In conclusion, the directional antenna (定向天线) is an essential tool in modern communication technology. Its ability to focus signals in a specific direction makes it invaluable for various applications, from television reception to satellite communications. While there are challenges associated with their use, the benefits of increased signal strength and reduced interference make directional antennas (定向天线) a popular choice among engineers and hobbyists alike. As technology continues to evolve, the role of directional antennas (定向天线) in enhancing communication will undoubtedly remain significant, paving the way for more efficient and reliable connectivity in our increasingly interconnected world.

在当今世界，通信技术在连接人们和设备方面发挥着至关重要的作用。增强通信的关键组成部分之一是天线。在各种类型的天线中，定向天线（directional antenna）因其能够将信号集中在特定方向而脱颖而出。这一特性使其在电信、广播甚至业余无线电等各种应用中都特别有用。定向天线（directional antenna）的基本原理在于其设计，使其能够更有效地在一个方向上发送或接收信号，同时最小化来自其他方向的干扰。这是通过使用反射器和导向器等元件来实现的，这些元件塑造了天线的辐射模式。因此，与全向天线相比，定向天线（directional antenna）可以在更长的距离内提供更强的信号。最常见的定向天线（directional antenna）类型之一是Yagi-Uda天线。这种天线由多个元件组成，包括驱动元件、反射器和导向器，这些元件共同工作以创建高度定向的波束。Yagi天线广泛用于电视接收和业余无线电通信。它专注于特定信号源的能力使其非常适合接收来自远处发射机的微弱信号。另一种流行的定向天线（directional antenna）是抛物面碟形天线。该天线使用弯曲的反射器来收集和聚焦信号到接收元件所在的单一点。抛物面天线通常用于卫星通信和微波传输。它们提供高增益，并能有效捕获来自绕地球轨道运行的卫星的信号，使其成为现代通信系统不可或缺的部分。使用定向天线（directional antenna）的优点是众多的。例如，通过将信号集中在特定方向，这些天线可以减少噪声和干扰，从而实现更清晰的通信。此外，它们可以通过允许信号在不降解的情况下传播得更远，从而扩展无线通信的范围。这一特性在信号可能较弱的农村地区尤其有利。然而，与定向天线（directional antenna）相关的一些挑战也存在。主要缺点之一是其覆盖区域有限。与可以从所有方向接收信号的全向天线不同，定向天线（directional antenna）需要与信号源精确对齐。这意味着如果信号源移动或位置发生变化，可能需要调整天线以保持最佳性能。总之，定向天线（directional antenna）是现代通信技术中的重要工具。其在特定方向上集中信号的能力使其在各种应用中不可或缺，从电视接收器到卫星通信。尽管使用中存在一些挑战，但增强信号强度和减少干扰的好处使得定向天线（directional antenna）在工程师和爱好者中都成为一种受欢迎的选择。随着技术的不断发展，定向天线（directional antenna）在增强通信中的作用无疑将继续保持重要，开辟了我们日益互联的世界中更高效和可靠的连接之路。