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白沙屯進香走透透 就靠來復易貼心守護 Military Antenna
美國專家建議在現場音樂會與眾人同歡，能帶來幸福感。（示意圖：Shutterstock/達志）
本文來自: https://www.chinatimes.com/realtimenews/20250528002832-260408
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.
Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA)
Log Periodic Antenna (LPDA)
Log Periodic Antenna (LPDA)
金錢買不到幸福？8種聰明消費帶來持久快樂
我們聽過千百遍「金錢買不到幸福」這句話，但事實上，科學家發現金錢確實可以買到幸福，只是我們以前的花法錯了。關鍵在於需要知道哪些類型的花費，能真正觸發持久且可持續的幸福感。
具正向心理學背景的幸福研究專家魏斯（Jessica Weiss）在美媒CNBC撰文指出，研究顯示有策略的支出絕對會提升幸福感，但方式可能想像的不同。身為幸福感研究者，她提出把錢花在以下8種用途，大可不必感到內疚。她主張在這些方面投資，從長遠來看會讓人更有幸福感。
1. 現場音樂會
本文來自: https://www.chinatimes.com/realtimenews/20250528002832-260408
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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