今明晴朗酷熱、楊柳颱風直撲台灣 歐美最新路徑預測看這裡 Horn Antenna
Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA)
全球最大化妝品集團萊雅(L’Oreal) 推出「補充包」產品，減少對環境的影響。(圖片來源/Pexels)
文章出自: https://www.chinatimes.com/realtimenews/20250822003413-260408
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)
美容產業如何永續發展？萊雅集團：補充包！
「美容」因著擁有龐大市場及影響力，成為不容忽視的產業之一，然而它對環境的影響也令人擔憂。美容產業對環境的影響涵蓋原料、包裝、製造、運輸、報廢，影響甚大，因此全球最大化妝品集團萊雅(L’Oreal) 推出「補充包」產品，不但減少環境影響也降低鉅額成本。
Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA)
萊雅 (L’Oreal) 是全世界最大的化妝品集團，全球擁有150個分公司，旗下擁有眾多知名品牌，包含植村秀、蘭蔻、赫蓮娜、Aesop、理膚寶水等等。萊雅長久以來始終致力於永續發展，永續發展主管Rohini Behl表示，身為美妝產業的領導者，早就意識到經濟效益與環境、社會責任密不可分，因此早在20年前訂定第一個產業環境目標、2013年推出首個永續發展計畫，更在2020年啟動「萊雅未來」計畫，盼藉由自身影響力引領氣候轉型、保護自然。
實質行動包含推出更優質的產品配方、降低包裝強度、使用再生材料、設計可重複使用的產品，目的在於減少包裝的重量及體積，進而減少環境足跡。Rohini指出，2022年在南亞、中東及北非地區開始使用再生PET瓶，為東南亞的包裹提供無塑膠包裝。
文章出自: https://www.chinatimes.com/realtimenews/20250822003413-260408
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.