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    <title>天线 - 标签 - SunnyHorn的博客</title>
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      <title>小时候转竹竿调电视信号，终于读懂天线背后的电磁逻辑</title>
      <link>https://hongshunli-blog.pages.dev/posts/%E5%A4%A9%E7%BA%BF%E8%AE%A4%E7%9F%A5%E9%9A%8F%E7%AC%94/</link>
      <pubDate>Fri, 11 Sep 2026 00:00:00 +0000</pubDate><author>hongshunli@hotmail.com (SunnyHorn)</author>
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      <description>&lt;p&gt;最早接触天线，我的心中一直存着两个很大的疑惑。半波对称天线，左右两根振子导线接上馈线，两端明明是开路状态，却可以正常做功；而倒F天线，信号正负极之间还有导线直接短路。放到直流电路，开路无法工作、短路直接故障，可在天线上面，这两种结构全都能稳定工作。&lt;/p&gt;</description>
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