close
Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA)
圖文/游善富
在宜蘭珍珠段寫生，地主的田地細長，有房子、有花草、有水池、有大樹、、，兩旁是他人稻田，可想像猶似一串項練。
Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA)
地主熱情招呼，歡迎在樹陰下寫生，有桌椅、、，原做為好友聚會地方。
炎酷夏日，在樹陰下卻很涼爽，遠望田野，在稻田與遠山襯托下，白雲尤像似珍珠項練。
問是何處？主人說是宜蘭珍珠路段！？不禁莞爾。
本文引用自: https://n.yam.com/Article/20240722316616
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
