Log Periodic Antenna (LPDA)
Log Periodic Antenna (LPDA)
Log Periodic Antenna (LPDA)
Log Periodic Antenna (LPDA)
Log Periodic Antenna (LPDA)
墨西哥是世界上唯一可以全年種植酪梨的地方，帶來經濟優勢的同時，也對當地森林環境造成破壞。(圖取自Photo AC)
Log Periodic Antenna (LPDA)
Log Periodic Antenna (LPDA)
本篇文章引用自此: https://www.chinatimes.com/realtimenews/20250901002900-260408
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.
永續農業轉型！墨西哥酪梨產業推「零森林砍伐」政策
8月27日，「墨西哥酪梨出口商協會」（APEAM）與「墨西哥哈斯酪梨進口商協會」（MHAIA）發布公告，自2026年1月起，凡種植於非法砍伐森林土地上的酪梨，將不符合出口資格。
根據新政策指出，自2025年起砍伐的森林土地不得用於出口酪梨；於2018年至2024年間開發的農地，若種植者能針對「生態系統服務」進行補償，仍有機會保留出口資格。目前已有85%的現有酪梨農園符合新標準，得以持續出口。
這項政策是「永續發展之路」計劃的一部份，旨在平衡產業發展、善用水資源、保護生物多樣性，以及在 2035 年實現零森林砍伐目標。
本篇文章引用自此: https://www.chinatimes.com/realtimenews/20250901002900-260408
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.