曾國城羞辱台大生 徐乃麟出手撂重話了 Open Boundary Quad-Ridged Horn Antenna
世界中學生運動會落幕 新北三民高中許芯慈奪3金獲38萬獎勵金 915MHz Antenna
Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA)
市府交通處去年9月於文化路夜市、中正路商圈設置火雞燈的創意構想深獲民眾好評,現今同樣於嘉義車站前知名觀光景點大白熊附近的中山路與中正路口、林森西路口等兩處行人專用號誌燈(小綠人)加裝燈箱,透過LED燈面動態圖像,結合嘉義市知名地標大白熊圖案,伴隨小綠人的動態圖像,吸引停等紅燈的行人注意行人專用燈號,希望藉此減少行人因低頭使用手機,或其他不專心行為而忽略行人燈號的危險。
Log Periodic Antenna (LPDA)
Log Periodic Antenna (LPDA)
市府交通處表示本次大白熊燈係由莊信棠(SMART)先生無償提供設計構想動畫檔,並授權交由交通處號誌廠商-尚正科技公司進行LED面板技術設計開發,順利推動大白熊燈的執行。市府交通處補充表示,行人專用號誌設施涉及交通安全、導引和統一辨識等問題,須依道路交通標誌標線號誌設置規則之統一設置規定辦理,由於小綠人設計需以「人」的圖像顯示,而非其他動物或物體,因此市府透過額外加裝燈箱的方式,將白熊燈融入行人專用號誌運作中,在符合交通管制設備規範前提之下,讓行人號誌更為醒目,達成顧及行人交通安全的同時,展現出嘉義市獨有的城市觀光意象。(圖/記者黃音文翻攝)
本文引用自: https://n.yam.com/Article/20250109698566
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.
世界中學生運動會落幕 新北三民高中許芯慈奪3金獲38萬獎勵金 915MHz Antenna
Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA)
(記者黃音文/嘉義報導)嘉義市繼有事青年節創意發想小綠人結合火雞燈後,(8)日接續於嘉義車站前兩處路口設置大白熊燈,透過SMART莊信棠先生設計授權,將大白熊圖像以剪影方式融入行人專用號誌(小綠人)第三燈箱搭配小綠人一同顯示,透過加裝燈箱的方式,將大白熊燈融入行人專用號誌運作中,讓行人號誌更為醒目,並展現嘉義市獨有城市觀光意象。
市府交通處去年9月於文化路夜市、中正路商圈設置火雞燈的創意構想深獲民眾好評,現今同樣於嘉義車站前知名觀光景點大白熊附近的中山路與中正路口、林森西路口等兩處行人專用號誌燈(小綠人)加裝燈箱,透過LED燈面動態圖像,結合嘉義市知名地標大白熊圖案,伴隨小綠人的動態圖像,吸引停等紅燈的行人注意行人專用燈號,希望藉此減少行人因低頭使用手機,或其他不專心行為而忽略行人燈號的危險。
市府交通處表示本次大白熊燈係由莊信棠(SMART)先生無償提供設計構想動畫檔,並授權交由交通處號誌廠商-尚正科技公司進行LED面板技術設計開發,順利推動大白熊燈的執行。市府交通處補充表示,行人專用號誌設施涉及交通安全、導引和統一辨識等問題,須依道路交通標誌標線號誌設置規則之統一設置規定辦理,由於小綠人設計需以「人」的圖像顯示,而非其他動物或物體,因此市府透過額外加裝燈箱的方式,將白熊燈融入行人專用號誌運作中,在符合交通管制設備規範前提之下,讓行人號誌更為醒目,達成顧及行人交通安全的同時,展現出嘉義市獨有的城市觀光意象。(圖/記者黃音文翻攝)
本文引用自: https://n.yam.com/Article/20250109698566
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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