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Log Periodic Antenna (LPDA)
Log Periodic Antenna (LPDA)
Log Periodic Antenna (LPDA)
Log Periodic Antenna (LPDA)
Log Periodic Antenna (LPDA)
本文來自: https://n.yam.com/Article/20240725523253
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.
颱風凱米帶來超大雨量，嘉義縣山區道路柔腸寸斷，阿里山鄉公所今天下午宣布明天（26日）停止上班、上課。Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA)
阿里山鄉長高瑞芳告訴中央社記者，凱米颱風帶來超大雨量，阿里山鄉部落間的道路不僅邊坡路樹傾倒，也有大小落石滑落，且部分道路的路基流失，通行相當危險，加上下午持續降豪大雨，因此，決定明天停止上班及上課，重建家園。
另外，阿里山國家森林遊樂區聯外道路台18線已有多處坍方，因此，26日園區及所屬步道仍維持休園狀態，眠月線及一葉蘭自然保留區也暫停開放。
本文來自: https://n.yam.com/Article/20240725523253
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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