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Log Periodic Antenna (LPDA)
Log Periodic Antenna (LPDA)
Log Periodic Antenna (LPDA)
Log Periodic Antenna (LPDA)
Log Periodic Antenna (LPDA)
本文出自: https://n.yam.com/Article/20240716691041
The Log Periodic Antenna as known as LPDA is a wideband directional antenna that provides gain and directivity combined over a wide band of frequencies.
Both Log-Periodic Antennas and Yagi antennas are high gain directional antennas. The main difference between these antennas is that Log-Periodic Antennas support wider frequency bandwidths and are physically much larger than Yagi antennas.
The log-periodic dipole array typical VSWR is 2:1 and operates over a much wider bandwidth and will have a lower gain for an equivalent number of elements.
With this level of performance, it is ideal for many applications, although a log-periodic antenna will be much larger than a Yagi of an equivalent gain.
近日一位日本女大生在網路上分享，自己對著路邊的販賣機掀起裙底，沒想到販賣機突然掉飲料下來，讓許多網友看到目瞪口呆。Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA)
該名自稱是G奶女大生的女網友かな，日前在社群平台X上傳影片，只見她在路邊的自動販賣機前沒有投幣，僅是對著機器掀起裙子、露出底褲，沒多久飲料就自動落了下來。
此影片，引發網友熱議，紛紛表示，「這太神奇了吧」、「我想成為自動販賣機」，更有男網友透露，自己也嘗試過，但自動販售機一點反應也沒有，希望能跟女網友かな請教，「究竟是怎麼辦到的？」
留言當中有人提到：「仔細看影片中，販賣機的鏡面後面有反射一個白衣男子，這應該是那種可以用APP或者遠端購買飲料的販賣機啦！只是突發奇想拍了這樣的影片，還挺有趣的」、「應該是APP遠端購買哦！我也有用APP買過一次，很方便的。」
本文出自: https://n.yam.com/Article/20240716691041
The Log Periodic Antenna as known as LPDA is a wideband directional antenna that provides gain and directivity combined over a wide band of frequencies.
Both Log-Periodic Antennas and Yagi antennas are high gain directional antennas. The main difference between these antennas is that Log-Periodic Antennas support wider frequency bandwidths and are physically much larger than Yagi antennas.
The log-periodic dipole array typical VSWR is 2:1 and operates over a much wider bandwidth and will have a lower gain for an equivalent number of elements.
With this level of performance, it is ideal for many applications, although a log-periodic antenna will be much larger than a Yagi of an equivalent gain.
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