parasitic antenna

简明释义

无源天线

英英释义

例句

1.By incorporating a parasitic antenna, the device achieved better reception.

通过结合一个寄生天线，该设备实现了更好的接收效果。

2.The design of the radio receiver was improved by adding a parasitic antenna.

通过添加一个寄生天线，收音机接收器的设计得到了改进。

3.Engineers often use parasitic antennas to optimize performance in crowded frequency bands.

工程师们常常使用寄生天线来优化拥挤频段的性能。

4.The parasitic antenna was installed to improve the overall efficiency of the system.

安装了寄生天线以提高系统的整体效率。

5.In many wireless communication systems, a parasitic antenna can enhance signal strength.

在许多无线通信系统中，寄生天线可以增强信号强度。

作文

The world of wireless communication has evolved significantly over the past few decades, and one of the fascinating components that have emerged in this field is the parasitic antenna. A parasitic antenna is a type of antenna that does not require a direct connection to the transmitter or receiver. Instead, it relies on the electromagnetic fields produced by another antenna to function effectively. This unique characteristic allows it to enhance the overall performance of a primary antenna system without the need for additional power sources or complex wiring.Understanding the principles of a parasitic antenna involves delving into the basics of how antennas operate. Antennas work by converting electrical energy into electromagnetic waves, which then propagate through space. In the case of a parasitic antenna, it typically consists of elements that are strategically placed in proximity to a primary antenna. These elements can be either directors or reflectors. Directors focus the energy in a specific direction, while reflectors bounce the energy back towards the primary antenna. The design of a parasitic antenna can significantly influence its efficiency and effectiveness. For instance, Yagi-Uda antennas are well-known examples that utilize parasitic antennas to achieve high directional gain. The directors in these antennas help to concentrate the signal, while the reflectors improve the back lobe rejection, resulting in a more focused beam of radio waves. This feature is particularly useful in applications such as television broadcasting and amateur radio, where signal clarity and strength are paramount.One of the advantages of using a parasitic antenna is its simplicity and cost-effectiveness. Since it does not require additional power or complex circuitry, it can be an excellent solution for enhancing signal strength in various settings. For example, many people use parasitic antennas in home setups to boost their Wi-Fi signals. By placing a parasitic antenna near a Wi-Fi router, users can improve coverage and reduce dead spots in their homes without investing in expensive equipment.Moreover, the compact nature of parasitic antennas makes them suitable for various applications, including mobile devices and portable communication systems. As technology continues to advance, the integration of parasitic antennas into smaller devices is becoming increasingly feasible. This trend opens up new possibilities for enhancing connectivity in densely populated urban areas, where signal interference is often a challenge.In conclusion, the parasitic antenna represents a remarkable innovation in the field of telecommunications. Its ability to enhance the performance of primary antennas without requiring additional power or complex installations makes it a valuable tool in both commercial and personal applications. As we continue to rely on wireless communication in our daily lives, understanding and utilizing technologies like the parasitic antenna will be essential for maintaining and improving connectivity in an ever-evolving digital landscape.

无线通信的世界在过去几十年中发生了重大变化，而在这一领域中出现的一个迷人组件就是寄生天线。寄生天线是一种不需要与发射器或接收器直接连接的天线。相反，它依赖于另一种天线产生的电磁场来有效工作。这一独特的特性使其能够在不需要额外电源或复杂布线的情况下增强主天线系统的整体性能。理解寄生天线的原理需要深入了解天线的基本工作原理。天线通过将电能转换为电磁波来工作，这些波随后在空间传播。在寄生天线的情况下，它通常由靠近主天线战略性放置的元件组成。这些元件可以是导向器或反射器。导向器将能量集中在特定方向，而反射器则将能量反弹回主天线。寄生天线的设计可以显著影响其效率和有效性。例如，八木-宇田天线是著名的例子，它利用寄生天线实现高方向增益。这些天线中的导向器有助于集中信号，而反射器改善了后瓣抑制，从而产生更集中的无线电波束。这一特性在电视广播和业余无线电等应用中尤为重要，因为信号清晰度和强度至关重要。使用寄生天线的一个优点是其简单性和经济性。由于它不需要额外的电力或复杂的电路，因此可以成为在各种环境中增强信号强度的优秀解决方案。例如，许多人在家庭设置中使用寄生天线来增强他们的Wi-Fi信号。通过将寄生天线放置在Wi-Fi路由器附近，用户可以提高覆盖范围并减少家中的死角，而无需投资昂贵的设备。此外，寄生天线的紧凑性使其适合各种应用，包括移动设备和便携式通信系统。随着技术的不断进步，将寄生天线集成到更小的设备中变得越来越可行。这一趋势为在信号干扰经常成为挑战的拥挤城市区域增强连接性开辟了新的可能性。总之，寄生天线代表了电信领域的一项显著创新。它能够在不需要额外电力或复杂安装的情况下增强主天线的性能，使其成为商业和个人应用中的宝贵工具。随着我们在日常生活中继续依赖无线通信，理解和利用如寄生天线这样的技术将对维护和改善在不断发展的数字环境中的连接性至关重要。