Log Periodic Antenna (LPDA)
Log Periodic Antenna (LPDA)
Log Periodic Antenna (LPDA)
Log Periodic Antenna (LPDA)
Log Periodic Antenna (LPDA)
俄羅斯與美國將於本週五（15日）在阿拉斯加舉行普丁與川普的高峰會。（路透社／張威翔合圖）
來自: https://www.chinatimes.com/realtimenews/20250814004286-260408
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.
美俄峰會時間議程敲定！烏克蘭戰爭 經貿合作全上桌
路透社報導，俄羅斯與美國將於本週五（15日）在阿拉斯加舉行普丁與川普的高峰會，克里姆林宮高級顧問鄂夏柯夫（Yuri Ushakov）表示，本次峰會議程已確定，將於當地時間上午11點30分（台灣時間16日凌晨3時30分）正式開始。雙方將先進行僅有翻譯在場的一對一會談，隨後與各自代表團舉行擴大會議並共進工作餐敘。
俄方代表團成員包括外長拉夫羅夫（Sergey Lavrov）、鄂夏柯夫、國防部長別洛烏索夫（Andrei Belousov）、財長西盧阿諾夫（Anton Siluanov）及主權財富基金負責人德米崔耶夫（Kirill Dmitriev）。
鄂夏柯夫指出，會議將討論敏感議題，核心焦點是烏克蘭危機的解決方案，並涉及雙邊貿易與經濟合作等領域，這些方面仍有巨大潛力可挖掘。高峰會結束後，普丁與川普將共同舉行記者會，對外說明會談成果。
來自: https://www.chinatimes.com/realtimenews/20250814004286-260408
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.
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