isotropic antenna

简明释义

无向性天线

英英释义

例句

1.In simulations, the performance of a real antenna is often compared to that of an isotropic antenna (各向同性天线).

在模拟中，真实天线的性能通常与isotropic antenna（各向同性天线）进行比较。

2.An isotropic antenna (各向同性天线) radiates power uniformly in all directions, making it a useful theoretical model.

一个isotropic antenna（各向同性天线）在所有方向上均匀辐射功率，使其成为一个有用的理论模型。

3.The gain of an isotropic antenna (各向同性天线) is typically considered to be 0 dBi.

一个isotropic antenna（各向同性天线）的增益通常被认为是0 dBi。

4.In wireless communication, we often assume the use of an isotropic antenna (各向同性天线) for simplifying calculations.

在无线通信中，我们通常假设使用一个isotropic antenna（各向同性天线）来简化计算。

5.When designing a network, engineers may refer to the isotropic antenna (各向同性天线) to establish coverage areas.

在设计网络时，工程师可能会参考isotropic antenna（各向同性天线）来确定覆盖区域。

作文

In the field of telecommunications and radio frequency engineering, understanding the concept of an isotropic antenna is crucial for both professionals and enthusiasts. An isotropic antenna is a theoretical antenna that radiates power uniformly in all directions. This means that no matter where you are relative to the antenna, the signal strength will be the same. While real antennas do not achieve perfect isotropy due to physical limitations and environmental factors, the concept serves as a useful benchmark for evaluating the performance of actual antennas.The idea of an isotropic antenna simplifies many calculations in antenna theory. For instance, when engineers design communication systems, they often use the isotropic antenna as a reference point to compare other types of antennas. By understanding how an isotropic antenna would theoretically behave, they can better assess the gain and efficiency of directional antennas, which focus energy in specific directions to improve performance.One of the key characteristics of an isotropic antenna is its radiation pattern, which is typically represented as a three-dimensional sphere. This spherical radiation pattern indicates that the antenna emits electromagnetic waves equally in all directions. In contrast, real antennas have more complex radiation patterns, often resembling lobes that indicate preferred directions of emission. The difference between these patterns helps engineers determine how well an antenna will perform in various applications, such as broadcasting, satellite communications, or wireless networking.Moreover, the concept of an isotropic antenna is also important in understanding the concept of antenna gain. Antenna gain is a measure of how much power is transmitted in a particular direction compared to an isotropic antenna. For example, a directional antenna may have a gain of 10 dBi (decibels relative to an isotropic antenna), meaning it transmits ten times more power in its preferred direction than an isotropic antenna would. This property is particularly advantageous in scenarios where signals need to travel long distances or penetrate obstacles, such as urban environments where buildings can obstruct signals.In practical applications, while we may never encounter a true isotropic antenna, the principles behind it guide the design and implementation of various antennas. Engineers often strive to create antennas that approximate isotropic behavior within certain ranges or conditions. For example, a dipole antenna, which is one of the simplest types of antennas, exhibits a radiation pattern that is similar to that of an isotropic antenna but is limited to a two-dimensional plane.In conclusion, the isotropic antenna serves as a foundational concept in antenna theory and radio communication. While it is a theoretical construct, its implications are significant in the practical world of telecommunications. By using the isotropic antenna as a reference, engineers can design more effective antennas that meet the needs of modern communication systems. Thus, grasping the concept of an isotropic antenna is essential for anyone looking to delve deeper into the fields of electronics and telecommunications, as it lays the groundwork for understanding more complex antenna designs and their applications.

在电信和射频工程领域，理解各向同性天线的概念对专业人士和爱好者来说至关重要。各向同性天线是一种理论天线，它在所有方向上均匀地辐射功率。这意味着，无论你相对于天线的位置如何，信号强度都是相同的。虽然真实的天线由于物理限制和环境因素无法实现完美的各向同性，但这一概念作为评估实际天线性能的有用基准。各向同性天线的概念简化了天线理论中的许多计算。例如，当工程师设计通信系统时，他们通常将各向同性天线作为参考点，以比较其他类型的天线。通过理解各向同性天线的理论行为，他们可以更好地评估定向天线的增益和效率，后者将能量集中在特定方向上以提高性能。各向同性天线的一个关键特性是其辐射模式，通常以三维球体表示。这种球形辐射模式表明，天线在所有方向上均等地发射电磁波。相比之下，真实天线的辐射模式则更加复杂，通常呈现出指示优选发射方向的波瓣。这些模式之间的差异帮助工程师确定天线在广播、卫星通信或无线网络等各种应用中的表现。此外，各向同性天线的概念在理解天线增益的概念时也很重要。天线增益是衡量在特定方向上传输的功率与各向同性天线相比的指标。例如，某个定向天线的增益为10 dBi（以各向同性天线为参考的分贝），这意味着它在其优选方向上比各向同性天线多传输十倍的功率。这一特性在信号需要长距离传播或穿透障碍物的场景中尤其有利，例如城市环境中建筑物可能会阻挡信号。在实际应用中，尽管我们可能永远不会遇到真正的各向同性天线，但其背后的原则指导着各种天线的设计和实施。工程师们通常努力创建在某些范围或条件下近似各向同性行为的天线。例如，偶极子天线是最简单的天线之一，其辐射模式与各向同性天线相似，但仅限于二维平面。总之，各向同性天线在天线理论和无线通信中作为基础概念发挥着重要作用。尽管它是一个理论构造，但其影响在现代通信的实际世界中是重大的。通过将各向同性天线作为参考，工程师可以设计出更有效的天线，以满足现代通信系统的需求。因此，掌握各向同性天线的概念对任何希望深入了解电子和电信领域的人来说是必不可少的，因为它为理解更复杂的天线设计及其应用奠定了基础。