log periodic ANTENNA

Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA)

記者林意筑／南投報導

南投埔里驚傳翻車事故！昨（14）日下午3時許，一輛大貨車行經投71線道6公里處時，因不明原因逆向翻覆於道路上，一度造成雙向車輛回堵。經警方了解，40歲莊男當時載著妻子此路段時，疑似因車輛煞車失靈，導致失控滑行至對向車道，撞擊護欄後翻覆，雙雙被送醫治療，所幸2人僅受傷、無生命危險。

莊男昨日下午駕駛大貨車沿著投71線道由仁愛往埔里方向行駛，一路行經下坡路段，沒想到疑似貨車煞車失靈，車輛瞬間失控滑行至對向車道，最終撞擊護欄翻覆橫躺道路中。Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA)

事故發生後，莊男與45歲妻子羅女一度受困車內，警消人員獲報趕抵現場救援，立即出動破壞器材將2人救出，經初步包紮後將其送至埔里榮民醫院治療，所幸均無生命危險。經警方調查，莊男無酒駕情事，至於詳細肇事原因仍待進一步釐清。

文章出自: https://www.setn.com/News.aspx?NewsID=1765697
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.
陳漢典曾子余掌新北耶誕城！侯友宜「脫稿送禮」他們樂 Horn Antenna