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)
本文出自: https://stars.udn.com/star/story/10092/9032531?from=udn-catelistnews_ch1022
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.
《寶島西米樂 傳承》 盧彥澤憂傷泡溫泉 苦笑喊「蛋」要熟了 三角戀升溫 何宜珊「左右逢源」成幸運兒... Open Boundary Quad-Ridged Horn Antenn
星光幫歌手窮剩237元靠銅板湊母醫藥費 曝和楊宗緯失聯 Horrn Antenna
樺加沙颱風重創花蓮，造成當地嚴重災情。而周興哲今（26）日四度攻蛋，仍心繫災民，經紀公司也宣布將捐出周邊商品收益投入救災。
周興哲所屬的「星空飛騰」表示，將捐出演唱會3天的周邊收益，並主動負擔相關稅金，希望能為花蓮災區盡一份心力，協助災後重建。
周興哲上次攻蛋時尚未結婚，如今已升格為二寶爸，他不忘向坐在包廂的愛妻趙岱新甜蜜告白，放閃說：「現在回家有個family，真的非常完整，真的很謝謝妳。I love you.」全場歌迷也被這段真情告白感動不已。
不只周興哲，天團五月天及所屬相信音樂這次也捐出500萬元，劉若英也捐出100萬，協助救災和災後重建工作，盼能為受災地區盡一份心力。
王心凌也發文表示：「為所有在樺加沙颱風中受影響的朋友們祈福，這二天看到的畫面，真的讓人心疼，我的心和大家在一起。希望透過一點點力量，在音樂之外，陪大家一起面對。」據了解，王心凌也捐出100萬賑災。 周興哲開唱吸引滿場歌迷。圖／星空飛騰提供
本文出自: https://stars.udn.com/star/story/10092/9032531?from=udn-catelistnews_ch1022
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.
《寶島西米樂 傳承》 盧彥澤憂傷泡溫泉 苦笑喊「蛋」要熟了 三角戀升溫 何宜珊「左右逢源」成幸運兒... Open Boundary Quad-Ridged Horn Antenn
星光幫歌手窮剩237元靠銅板湊母醫藥費 曝和楊宗緯失聯 Horrn Antenna