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Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA)
北韓批去核化「過時且荒謬」 南韓部署國產系統嚇阻
美日韓近期針對北韓去核化提出共同聲明，北韓外交部今日譴責此聲明，並表示北韓會持續發展其核武力。北韓外交部批評北韓去核化願景是「過時且荒謬的」；而南韓則指，已部署新款國產「雷霆」飛彈系統，短時間精準應對北韓長程飛彈威脅。
美國國務卿盧比歐、南韓外長趙兌烈、日本外相岩屋毅週六於慕尼黑安全會議場邊會談，並發表聲明，重申對北韓全面去核化的承諾。
北韓外交部批評美日韓追求的是「過時且荒謬」的計畫，並警告不要尋求煽動集體敵意與衝突的愚蠢行為。
本文引用自: https://www.chinatimes.com/realtimenews/20250218005056-260408
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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