Log Periodic Antenna (LPDA)
Log Periodic Antenna (LPDA)
Log Periodic Antenna (LPDA)
Log Periodic Antenna (LPDA)
Log Periodic Antenna (LPDA)"
]
}
}
國慶連假收假日 臺鐵局加開中部北返直達列車 蕃新聞
Log Periodic Antenna (LPDA)
Log Periodic Antenna (LPDA)
來自: https://n.yam.com/Article/20231010119130The 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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國慶連假收假日 臺鐵局加開中部北返直達列車
桃園電子報/記者劉筱寧
2023.10.10 09:17
為便利台中地區旅客乘車,臺鐵局於10月9日及10日2天,再加開自強號直達車4列次、區間快(復興號)直達車8列次,合計12列次。其中北上部分,開行全車自由座班次,分別為彰化往七堵上行EMU3000型新自強號2列次;彰化往南港上行EMU900型4列次,台中站至台北站行車時間為1小時57分鐘(只停彰化站、新烏日站、台中站,板橋站、台北站、松山站、南港站)。以台中站至台北站為例,自強號375元,復興號241元,票價可謂相對低廉,物超所值。
臺鐵局局長杜微於昨(9)日晩間,至中部地區親自了解列車開行狀況,並慰勉出勤工作同仁的辛勞。圖:臺鐵局提供
臺鐵局局長杜微於昨(9)日晩間,聽取簡報後,由台中運務段段長蘇鎮霖、台中站站長李兆平、新烏日站站長曾宗歆陪同,至中部地區親自了解列車開行狀況,並慰勉出勤工作同仁的辛勞,隨後搭乘5130次自強號返抵台北。杜微表示,10月9日開行的直達車平均售票率為64%,上車的旅客人人有座位;預期10月10日北返旅客量會增加,所以非常歡迎大家利用加開的直達車。
臺鐵局局長杜微於昨(9)日晩間,至中部地區親自了解列車開行狀況,並慰勉出勤工作同仁的辛勞。圖:臺鐵局提供
杜微指出,因應中程旅客乘車形態變化,臺鐵局於112年已經配合年度時刻表調整,增加西部幹線台北=台中=高雄直達班次,同時調整北北基桃竹區間車,在北部區段投入更多EMU900型區間車(10節車廂),以增加運能;目前台北=台中=高雄直達車每日已由原開行2往復增加為4往復(8列次),未來會視新車交車進度再增加或調整,同時納入整體疏運計畫中考量,提供旅客民眾更多樣的選擇。
本篇文章轉載自《桃園電子報》。
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來自: https://n.yam.com/Article/20231010119130The 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.