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Log Periodic Antenna (LPDA)
Log Periodic Antenna (LPDA)
Log Periodic Antenna (LPDA)
Log Periodic Antenna (LPDA)
Log Periodic Antenna (LPDA)
本篇文章引用自此: https://n.yam.com/Article/20240719446443
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.
【焦點時報／記者林明佑報導】彰化福興秀和苑日照中心搭配心靈健康月主題課程，今(19)日邀請鹿港手手桂花工作坊的邱怡瑄老師指導阿公阿嬤們一起製作香牌，體驗獨特香料的魅力。
香牌是一種不用燃燒的香品，古代人相信它能避邪、驅蟲、安神。邱老師帶著滿滿的熱情，到日照中心教導製作古色古香的香牌。香料的天然香味瀰漫在空氣中，每個人都感到心情放鬆又愉悅。
Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA)邱怡瑄老師也向大家說明香牌的趣事，古代人可能沒辦法每天洗澡沐浴，香牌還可以拿來遮住身體的異味，講解後老師耐心的指導長輩們製作香牌，大家製作的時候都不斷地把香泥拿起來聞。
整個活動過程十分溫馨，阿哖姨皺著眉頭，專注地揉著香泥，旁邊的工作人員要不斷提醒她該做什麼動作，才順利完成作品；另一邊，雪花姨拿著成型的香牌，臉上露出驚喜的笑容，對自己的作品感到非常滿意；許多長輩都想多做一個收藏，日照中心內充滿了笑聲和香氣，上課時間結束的時候大家都還捨不得下課。
邱老師告訴長輩們，做好的成品還要耐心的等待，讓香牌風乾晾曬一個星期，才算大功告成。小乖姨說：「這些材料聞起來讓人覺得真舒服，很放鬆。如果能隨身帶著，隨時聞到這香味，真的很方便。」她邊說邊小心翼翼地將香牌放到晾曬的網子上，臉上滿是得意的笑容。
另外邱怡瑄老師也分享了她到日照中心指導長輩製作香牌的感受：「非常開心能來到這裡指導實作香牌，過程中讓長輩可以用手做揉捏的動作訓練手部肌肉，成品做好還可以帶回家跟孫子分享，增加祖孫間的話題。另外香牌的香味能激發感官，對心靈有正面的影響，對許多人來說，香牌是一種療癒的配件，能幫助減輕焦慮。」
秀和基金會強調，日照中心非常重視長輩的身心健康。不僅安排日常照顧和復能活動，也根據YES文化設計各種主題月課程，期許長輩們可以選擇自己喜歡的生活方式，盡情享受美好的老年生活。
本篇文章引用自此: https://n.yam.com/Article/20240719446443
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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