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Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA)
南韓101架波音737-800停飛特檢 延至1／10完成
南韓史上最嚴重航空事故中墜毀的濟州航空波音737-800客機，發動機製造商通用動力航太（GE Aerospace）也參與了調查。同時，南韓交通部將對國內101架波音737-800的停飛特特檢延長至1月10日，以徹查事故原因。
據《路透社》3日報導，該客機由濟州航空營運，日前從曼谷飛往務安國際機場途中腹部著陸，衝出跑道後撞上土堤並起火爆炸，造成179人罹難。監控影像顯示，墜機前右側發動機冒煙。
交通部表示，調查範圍包括發動機、維修紀錄及起落架，若發現嚴重違規，涉事航空公司或將面臨停飛處分。目前調查團隊擴增至23人，成員包括12名韓國專家及來自美國波音公司和美國國家運輸安全委員會（NTSB）的代表。
文章來自: https://www.chinatimes.com/realtimenews/20250103003891-260408
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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