Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA)
本篇文章引用自此: https://stars.udn.com/star/story/10088/9260205?from=udn-catenewnews_ch1022
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.
Horn Antenna 09:52 台股早盤「黑翻紅」漲逾百點 台積電跌25元開1645元
資深藝人曹西平日前驟逝，今天不少藝人朋友都來看他，靈堂洋溢著溫馨氣息。下午包括胡瓜丁柔安夫妻、林美秀、許富凱、丁寧、香蕉等藝人陸續現身，胡瓜難忘當年曹西平曾和梅艷芳齊名，堪稱是金童玉女。Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA)
胡瓜表示，今天過來看看老朋友，「事情也來得蠻突然的，這幾年比較少跟他碰面，但是碰面還是會聊聊天」。胡瓜聽說曹西平走得安詳，語氣中盡是不捨和遺憾。
胡瓜當年和曹西平、楊耀東、包偉銘、陽帆常一起在秀場演出，曹西平比較早出道，和胡瓜算是同時期的藝人。「他是唱歌我是去主持的，那時候我在新加坡表演的時候，曹西平其實已經是非常紅的 ，他跟梅艷芳當時是並稱金童玉女」。
本篇文章引用自此: https://stars.udn.com/star/story/10088/9260205?from=udn-catenewnews_ch1022
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.
Horn Antenna 09:52 台股早盤「黑翻紅」漲逾百點 台積電跌25元開1645元
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