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Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA)Antenna 雨　水（組詩）／王原昌

王原昌

可以解釋為降雨而來的水
也能做為一個節氣看待
我祈禱，萬物也祈禱：
上蒼保佑，恩賜一場雨吧

我知道，冬天乾涸已久
湖泊、河流守著最後幾窪水
白鷺的長喙探尋蟲蝦的蹤跡
魚兒鑽到泥潭躲避災難

Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA)農人在田間揮汗如雨
鋤頭寫下‌“麥田返漿，抓緊松耪”
把汗水想像成一條河流
看每一捧泥土都是討水的松鼠

我的願望卑微也崇高
寧可萎蔫成一株缺水的鸞尾花
也要祝福天下萬物雨露均沾
各得其所，老有所依

◆初　春
沒有到說萬紫千紅的時候
春天被囚禁在二月的倒春寒裏
掙扎、呐喊。遭遇難產
暖陽受邀成主刀醫生
春風做了器械護士
合力剖腹產出春色嬌娃
紅豔的草莓從大棚探出頭
被擺在乍暖還寒的街頭
梨花骨縫的強強開出了花蕾
等候蜜蜂的親吻抵達蕊心
山羊覓食積雪下的草芽
連積蓄已久的萌動也被嘴嚼
我對萬物懷有慈悲心腸
願它們陸續掏出內心的春意
在初春萌發、舒展、蓬勃

◆春　雪
按說是春雨登臺表演的時侯
你卻依仗顏值高不退場
舞得比柳條還妖嬈

一場吞吞吐吐的表白
誰敢接受曇花一現的虛情？

最終，被大地納妾
成了後宮佳麗
偶爾，聽見在小溪或河流啜泣

新聞圖片



文章出自: https://n.yam.com/Article/20250221348287
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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