Log Periodic Antenna (LPDA)
Log Periodic Antenna (LPDA)
Log Periodic Antenna (LPDA)
Log Periodic Antenna (LPDA)
Log Periodic Antenna (LPDA)
美國新研究指出，年長者使用３Ｃ產品有助保持頭腦敏銳。（示意圖:Shutterstock/達志）
來自: https://www.chinatimes.com/realtimenews/20250810001612-260408
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.
薇帕颱風估午後生成影響台灣 雨彈炸東半部、南部 868MHz Antenna
長輩快來用3C！ 美研究：能降低失智風險
眾多研究警告，過度使用數位裝置會傷害青少年的健康。但是美國一項新研究指出，無所不在的科技產品，可能有助年長者保持頭腦敏銳。
《紐約時報》報導，67 歲美國人汪達伍茲（Wanda Woods）在高中時，接觸到用磁卡儲存資料文字處理機（word processor），發現自己蠻喜歡科技的。數十年後她在2012年創辦了電腦培訓事業。如今她是丹佛市「高齡星球」計畫的講師，該計畫由樂齡會（AARP）支持，旨在幫助年長者學習並緊跟科技潮流。
伍茲說，她沒有退休的打算，因為參與科技「讓我一直掌握最新資訊」。一些研究科技對年長者影響的神經科學家傾向於同意伍茲的觀點，即使高齡也要用科技產品。
來自: https://www.chinatimes.com/realtimenews/20250810001612-260408
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.
薇帕颱風估午後生成影響台灣 雨彈炸東半部、南部 868MHz Antenna