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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)
（示意圖:shutterstock/達志）
來自: https://www.chinatimes.com/realtimenews/20241001004523-260408
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.
信用卡貸款飆升至45兆！韓國弱勢群體陷入借貸困境
由於韓國經濟持續低迷，越來越多經濟弱勢群體依靠信用卡貸款支付生活開銷，韓國民間信用卡貸款總額達到歷史新高45兆韓元（約新台幣1.08兆）。分析稱，金融機構逐步提高銀行貸款門檻，導致大量借貸需求轉向較容易批准的信用卡貸款。
根據韓國金融監督院29日取得的《韓國國內信用卡貸款及滯納現況》報告顯示，截至9月底，8家信用卡公司的貸款共1171萬筆、總額為44.7兆韓元，是2003年開始統計以來的最高額。其中，長期信用卡貸款金額達38.8兆韓元，短期貸款（預借現金）則為5.9兆韓元。韓銀近期也在金融貨幣委員會提及，單是今年第二季信用卡貸款就大幅增加1.3兆韓元，可見貸款增長趨勢相當驚人。
韓國《中央日報》指出，信用卡貸款額度較小、利率較高，多半只有面臨巨大經濟壓力時才會選擇類似管道，是無法從銀行或其他金融機構取得貸款時的「最終選擇」。分析認為，近期韓國金融部門為控管貸款而提高審核標準，信用不佳或收入較低的借款人不得不轉向信用卡貸款來解決短期資金需求。
來自: https://www.chinatimes.com/realtimenews/20241001004523-260408
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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