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300W Wideband Horn Antenna with Three Independent ...
SpaceX星艦在進行地面發動機點火測試前突然起火。(畫面擷取自SpaceX官方直播)
以下文章來自: https://www.chinatimes.com/realtimenews/20250619004023-260408
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.
Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA)
影》地面點火測試失敗!SpaceX星艦火箭炸成巨型火球

SpaceX的「星艦」(Starship)上級火箭台灣時間週四(19日)下午1時許,在德州墨西哥灣沿岸的「星際基地」(Starbase)製造與測試設施中發生爆炸,原定進行第10次飛行測試的星艦,在進行地面發動機點火測試前突然起火,引發巨大爆炸並摧毀整具火箭,這起事故可能對SpaceX的重型火箭開發與後續登月任務造成嚴重影響。
哥倫比亞廣播公司(CBS)報導,根據監控SpaceX活動的LabPadre公司發布的影像顯示,爆炸發生在美中時間晚間11點過後約10至15分鐘,離原定測試時間不遠,畫面顯示火箭上面偏中間一處先發生一次爆炸,緊接著左側也出現劇烈燃燒與碎片四射,整座測試架瞬間被火球吞沒,場景宛如炸彈爆炸。
Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA)爆炸當時,星艦正在裝填液態氧與部分甲烷燃料,過了90多分鐘火勢仍未受控,現場是星際基地內部專門進行低溫與熱火測試的Massey測試區。
以下文章來自: https://www.chinatimes.com/realtimenews/20250619004023-260408
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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