美國國際貿易委員會（US International Trade Commission）昨（20）日確認，東南亞4國傾銷的太陽能設備對美國太陽能廠商造成傷害，這代表美國對柬埔寨、馬來西亞、泰國、越南太陽能產品課徵的關稅已成定局，當中柬埔寨將被課徵最高3521％關稅。

綜合路透等外媒報導，美國國際貿易委員會3名委員昨日投票通過，認定柬埔寨、馬來西亞、泰國、越南等東南亞國家大量傾銷廉價太陽能設備，傷害、威脅到美國太陽能板生產商。

美國國際貿易委員會的決定，是美國對東南亞太陽能產品關稅於6月生效的關鍵最終門檻，只有在美國國際貿易委員會確認，海外競爭對手接收不公平補貼或傾銷產品至美國市場，導致國內產業受到損害或威脅，美國商務部才能對海外企業課徵關稅。委員的贊成票，代表商務部將發布命令，對柬埔寨、馬來西亞、泰國、越南實施反補貼及反傾銷稅。

引用自: https://www.chinatimes.com/realtimenews/20250521003819-260408
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.