街口支付爆信任危機！母公司遭查封 全國電子、3大電商緊急下架付款功能 Horn Antenna
Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA)
連接大阪世博會場的大阪地鐵中央線，13日深夜故障停駛，導致約3萬名遊客一度受困會場，當中不少民眾被迫夜宿場館。（資料照／美聯社）
大阪地鐵13日深夜癱瘓，大批民眾被迫夜宿世博會場。
以下文章來自: https://www.chinatimes.com/realtimenews/20250814002098-260408
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)
影》大阪地鐵癱瘓3萬人困世博！「躺地過夜」畫面曝 36人送醫
訂閱影音：
- 中時新聞網
連接大阪世博會場的大阪地鐵中央線，當地時間昨（13）日深夜故障停駛，導致約3萬名遊客一度受困會場，儘管部分民眾改搭巴士離開，仍有大批民眾被迫夜宿世博會場，共有36人因中暑症狀送醫。
綜合共同社、NHK、《讀賣新聞》等多家日媒報導，當地時間昨日深夜9時30分左右，連接大阪世博會場的大阪地鐵中央線突然因電力中斷停駛，當時接近世博10點的閉園時間，場內仍有約3萬名遊客，大批民眾一度回不了家。
大阪世博會場幅員遼闊，東入口鄰近唯一的地鐵站夢洲站，西入口可搭乘巴士，地鐵停駛時，不少原本要搭乘地鐵返家的遊客改步行至西入口，但公車站及計程車站都大排長龍。Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA)晚間10時10分，大阪地鐵恢復夢洲站至下一站宇宙廣場站（Cosmo Square）之間的行駛，但因人潮眾多，地鐵站實施進場管制。
以下文章來自: https://www.chinatimes.com/realtimenews/20250814002098-260408
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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