File:Dipole receiving antenna animation 6 800x394x150ms.gif

Dipole_receiving_antenna_animation_6_800x394x150ms.gif (800 × 394像素,文件大小:271 KB,MIME类型:image/gif、​循环、​16帧、​2.4秒)


摘要

描述
English: Animation showing a half-wave dipole antenna receiving power from a radio wave. The antenna consists of two metal rods each one-quarter of the wavelength long, attached through a parallel transmission line to a resistance R equal to the characteristic impedance of the antenna, representing the receiver. The electromagnetic wave is represented by its electric field (E, green arrows) (it should be kept in mind that the drawing only shows the field along one line, while the radio wave is actually a plane wave and the electric field is actually the same at every point on a plane perpendicular to the direction of motion). The wave's magnetic field is not shown.

The oscillating electric field exerts force on the electrons in the antenna rods , causing them to move back and forth in currents (black arrows) between the ends of the antenna rods, charging the ends of the antenna alternately positive (+) and negative (−). Since the antenna is a half-wavelength long at the radio wave's frequency, it excites standing waves of voltage (V, red) and current in the antenna. The voltage along the antenna elements is represented graphically by a band of red whose thickness at any point is proportional to the magnitude of the voltage. The oscillating currents flowing back and forth from one antenna element to the other, pass down the transmission line and through the radio receiver, represented by R. In this animation the action is shown slowed down drastically; the radio waves received by dipoles actually oscillate back and forth at tens of thousands to billions of cycles per second.
日期
来源 自己的作品
作者 Chetvorno
其他版本

Dipole receiving antenna animation 6 300ms.gif Slower version
Dipole receiving antenna animation 2 800x403x15ms.gif - more wide view

Dipole_receiving_antenna_animation_4_616x380x150ms.gif - shows waves of voltage and current traveling down transmission line
该circuit图像可使用矢量图形重新创建为SVG文件。这有很多好处;更多信息请参见共享资源:待清理媒体。如果存在此图片的SVG格式,请将其上传,然后将此模板替换为{{vector version available|新图片名称}}。 建议您将SVG命名为“Dipole receiving antenna animation 6 800x394x150ms.svg”,这样在使用Vector version available(或Vva)模板时就不需要填写新图片名称参数。

许可协议

我,本作品著作权人,特此采用以下许可协议发表本作品:
Creative Commons CC-Zero 本作品采用知识共享CC0 1.0 通用公有领域贡献许可协议授权。
采用本宣告发表本作品的人,已在法律允许的范围内,通过在全世界放弃其对本作品拥有的著作权法规定的所有权利(包括所有相关权利),将本作品贡献至公有领域。您可以复制、修改、传播和表演本作品,将其用于商业目的,无需要求授权。

说明

添加一行文字以描述该文件所表现的内容
Animated diagram of a dipole antenna receiving radio waves

此文件中描述的项目

描绘内容

创作作者 简体中文(已转写)

某些值没有维基数据项目

作者姓名字符串 简体中文(已转写):​Chetvorno
维基媒体用户名 简体中文(已转写):​Chetvorno

版权状态 简体中文(已转写)

文件来源 简体中文(已转写)

上传者的原创作品 简体中文(已转写)

文件历史

点击某个日期/时间查看对应时刻的文件。

日期/时间缩⁠略⁠图大小用户备注
当前2015年6月7日 (日) 07:472015年6月7日 (日) 07:47版本的缩略图800 × 394(271 KB)ChetvornoUser created page with UploadWizard

以下2个页面使用本文件:

全域文件用途

以下其他wiki使用此文件:

查看此文件的更多全域用途

元数据