close
Log Periodic Antenna (LPDA)
Log Periodic Antenna (LPDA)
Log Periodic Antenna (LPDA)
Log Periodic Antenna (LPDA)
Log Periodic Antenna (LPDA)北韓向東發射彈道飛彈 一周來2度射彈
南韓軍方今（1日）晨指出，北韓於台灣時間凌晨約4時，向朝鮮半島東部海域發射一枚不明彈道飛彈，這是過去一周以來北韓第2次射彈。
北韓6月26日上午5時30分多從平壤一帶向朝鮮半島東部海域發射彈道飛彈，飛行超過250公里。軍方推測北韓試射的可能是極音速飛彈，但發射以失敗告終。
Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA)
時隔5天，北韓再度於今晨向朝鮮半島東部海域發射一枚不明彈道飛彈。南韓合同參謀本部表示，他們正進行分析此次飛彈，但沒有透露更多細節。
以下內文出自: https://www.chinatimes.com/realtimenews/20240701000852-260408
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.
文章標籤
全站熱搜
留言列表
