Log Periodic Antenna (LPDA)
Log Periodic Antenna (LPDA)
Log Periodic Antenna (LPDA)
Log Periodic Antenna (LPDA)
Log Periodic Antenna (LPDA)
美國路易斯安那州紐奧良女市長坎特雷爾(LaToya Cantrell)被爆出喪夫前,就偷吃男隨扈,更挪用公款談戀愛。(圖/美聯社)
文章出自: https://www.chinatimes.com/realtimenews/20250817002795-260408
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.
美已婚女市長爆偷吃隨扈 挪用210萬公費談戀愛
美國路易斯安那州紐奧良女市長坎特雷爾(LaToya Cantrell)近日遭聯邦檢察官起訴,罪名包括詐欺與貪污,原來她被發現在喪夫前就與前警官兼貼身隨扈瓦皮(Jeffrey Vappie)存在「親密關係」,甚至挪用市府多達7萬美元(約新台幣210萬元)經費談戀愛。而坎特雷爾本是近300年來當地第一任女性市長,如今還成為該市歷史上首位還在任期內遭起訴的市長。
根據外媒《BBC》報導,美國政壇近期被揭露一樁醜聞,現年53歲坎特雷爾是路易斯安那州紐奧良市的市長,檢方指出,自2021年10月起坎特雷爾與貼身隨扈瓦皮,悄悄發展一段「私人且親密的關係」,直到2024年6月瓦皮退休前,兩人多次假藉執勤名義,實際上是跑去約會,其中包含14次國內外旅遊。
檢方同時揭露,坎特雷爾多次私人活動,都以「確保安全」為由讓瓦皮跟隨,將隨扈同行合理化,更能規避審查;至於這些約會的開銷多達7萬美元(約新台幣210萬元),全都從市府的經費中挪用。
文章出自: https://www.chinatimes.com/realtimenews/20250817002795-260408
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.