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868MHz Antenna 台灣首家嘉佩樂酒店坐落在台北 4月1日迎賓
許常德錄「綜藝一級棒」錄到走心 放話「我不會再來」 Horn Antenna
川普公布對全球的關稅稅率，被批評算式粗糙不合理。克魯曼認為，要是出現經濟危機，他也不會認錯。(圖/美聯社)
本文出自: https://www.chinatimes.com/realtimenews/20250406003324-260408
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.
許常德錄「綜藝一級棒」錄到走心 放話「我不會再來」 Horn Antenna
Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA)
諾貝爾得主克魯曼批川普關稅理論「像沒準備的考生亂寫」
川普的經濟戰正式開打，幾乎所有的經濟體都面臨10~50%的關稅重擊，可預見經濟海嘯將非常嚴重。紐約時報專經濟專欄作家、諾貝爾經濟學獎得主保羅克魯曼(Paul Krugman)，在創作平台Substack發表專文抨擊川普將毀了一切。
克魯曼表示，是美國創建現代世界貿易體系。而逐步降低關稅的談判程序，源自於羅斯福於 1934 年制定的《互惠貿易協定法》。而在該體系下，國際貿易成長是會有一些負面影響，但總體而言，對美國和世界都非常有利。
克魯曼認為「事實上，這是我們最偉大的政策成就之一。Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA)
本文出自: https://www.chinatimes.com/realtimenews/20250406003324-260408
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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