antenna standing wave ratio

简明释义

天线驻波比

英英释义

例句

1.During the installation, we monitored the antenna standing wave ratio to avoid signal loss.

在安装过程中，我们监控了天线驻波比以避免信号损失。

2.The technician measured the antenna standing wave ratio to ensure optimal signal transmission.

技术人员测量了天线驻波比以确保最佳信号传输。

3.A low antenna standing wave ratio indicates a well-matched antenna system.

低天线驻波比表示天线系统匹配良好。

4.Engineers aim for an antenna standing wave ratio of 1.5 or lower for efficient operation.

工程师的目标是将天线驻波比控制在1.5或更低，以实现高效运作。

5.An antenna standing wave ratio above 2:1 may suggest issues with the antenna setup.

天线驻波比超过2:1可能表明天线设置存在问题。

作文

The concept of antenna standing wave ratio is crucial for understanding the efficiency and performance of antennas in communication systems. In essence, the antenna standing wave ratio (often abbreviated as SWR) is a measure of how well an antenna is matched to the transmission line it is connected to. A low SWR indicates that most of the power sent from the transmitter is being radiated by the antenna, while a high SWR suggests that a significant portion of the power is being reflected back towards the source, which can lead to inefficiencies and potential damage to the transmitter. When discussing the antenna standing wave ratio, it is important to understand the relationship between the input impedance of the antenna and the characteristic impedance of the transmission line. Ideally, these two impedances should match to ensure maximum power transfer. If they do not match, standing waves are created along the transmission line, resulting in a variation of voltage and current at different points along the line. The antenna standing wave ratio quantifies this effect by comparing the maximum and minimum voltages along the line. In practical terms, achieving a low antenna standing wave ratio is essential for any radio frequency (RF) application. For instance, amateur radio operators often strive for an SWR of 1:1, which indicates perfect matching. However, in real-world applications, achieving such a perfect match is challenging, and an SWR of up to 1.5:1 is generally considered acceptable. Beyond this threshold, users may experience increased losses and reduced range. The measurement of antenna standing wave ratio can be performed using an SWR meter, which is usually placed between the transmitter and the antenna. This device provides a direct reading of the SWR, allowing operators to make necessary adjustments to their systems. Adjustments might include changing the length of the antenna, altering its position, or using an antenna tuner to match the impedances effectively. Moreover, understanding the antenna standing wave ratio is not only vital for individual operators but also for engineers designing communication systems. In modern environments where multiple antennas and frequencies are used, maintaining a low SWR across various components becomes increasingly complex. Engineers must consider factors such as frequency response, bandwidth, and environmental influences when designing antenna systems to ensure optimal performance. In conclusion, the antenna standing wave ratio is a fundamental parameter that reflects the efficiency of an antenna system. It serves as an indicator of how well the antenna is functioning in conjunction with the transmission line. By striving for a low SWR, operators and engineers alike can enhance the performance of their communication systems, ensuring effective transmission and reception of signals. Understanding and monitoring the antenna standing wave ratio is therefore essential for anyone involved in the field of radio communications, from hobbyists to professional engineers.

“天线驻波比”这一概念对于理解通信系统中天线的效率和性能至关重要。实际上，天线驻波比（通常缩写为SWR）是衡量天线与其连接的传输线匹配程度的指标。较低的SWR表明从发射器发送的大部分功率被天线辐射，而较高的SWR则表明相当一部分功率被反射回源头，这可能导致效率低下和对发射器的潜在损害。在讨论天线驻波比时，了解天线的输入阻抗与传输线的特性阻抗之间的关系非常重要。理想情况下，这两种阻抗应该匹配，以确保最大功率传输。如果它们不匹配，就会在传输线上产生驻波，导致沿线不同点的电压和电流变化。天线驻波比通过比较沿线的最大和最小电压来量化这种效应。在实际应用中，达到低天线驻波比对任何射频（RF）应用都是必不可少的。例如，业余无线电操作员通常努力追求1:1的SWR，这表示完美匹配。然而，在现实世界的应用中，达到如此完美的匹配是具有挑战性的，通常认为高达1.5:1的SWR是可以接受的。在这个阈值之外，用户可能会经历增加的损耗和减少的范围。天线驻波比的测量可以使用SWR表进行，该设备通常放置在发射器和天线之间。该设备提供SWR的直接读数，允许操作员对其系统进行必要的调整。调整可能包括改变天线的长度、改变其位置，或使用天线调谐器有效匹配阻抗。此外，理解天线驻波比不仅对个体操作员至关重要，对设计通信系统的工程师也是如此。在现代环境中，使用多个天线和频率，保持各个组件的低SWR变得日益复杂。工程师在设计天线系统时必须考虑频率响应、带宽和环境影响等因素，以确保最佳性能。总之，天线驻波比是反映天线系统效率的基本参数。它作为天线与传输线功能良好的指示器。通过追求低SWR，操作员和工程师都可以提升其通信系统的性能，确保信号的有效传输和接收。因此，理解和监测天线驻波比对于任何参与无线通信领域的人来说都是至关重要的，从业余爱好者到专业工程师。