一名潛水員來到海洋但並不是為了探險，而是為了拯救一隻「困在浮標上的負鼠」？
據國外媒體PEOPLE的報導，負鼠是一種有袋動物，主要生活在陸地上。牠們主要來自澳大利亞的叢林中，但是不知何故，一隻負鼠居然被發現出現在塔斯曼海中，抱著一個浮標。經營潛水業務（RedBoats）的救援人員「盧克·英格利希」（Luke English）表示這是這輩子見過最奇葩的事情了。過去的他曾經救下落海的汪星人和受傷的企鵝，但從未見過抱住浮標的負鼠。當盧克接獲負鼠的消息後，他馬上搭乘小船前往負鼠的地點，並馬上展開了救援行動。
▼ 盧克表示當自己趕到現場時看見抱住浮標的負鼠時，心中可是哭笑不得。
人們推斷負鼠很可能是在一艘船上築巢，但船發動引擎開始航行時便將牠嚇得跌落進水中，最終只能抱著臨近的浮標求生。所幸救援行動非常順利，雖然當救援隊抵達時負鼠受到了驚嚇便跳入水中，但是盧克趕緊使用漁網將牠打撈上來並放回陸地。鹿科表示負鼠雖然受到了驚嚇但是身體沒有大礙。只希望下次負鼠築巢時能好好看清地點，避免悲劇再次發生！
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.
The feature of these antennas are:
EMC/EMI pre-compliance test antenna.
Very high gain over the full frequency range.
Meets latest EMC standards up to 7GHz.
Suitable even for immunity measurements
原文出自PEOPLE。
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本文出自: http://n.yam.com/Article/20220414892272
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