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美新任駐陸大使赴北京履新 帕度：讓美國更強大繁榮 Military Antenna
日本入境JESTA系統2028年上路 「免簽外籍客」須提前申報 915MHz Antenna
面對關稅壓力升高與全國品牌商品漲價潮，美國零售業掀起一波強化自有品牌風潮。（示意圖：shutterstock/達志）
文章出自: https://www.chinatimes.com/realtimenews/20250607001444-260408
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.
日本入境JESTA系統2028年上路 「免簽外籍客」須提前申報 915MHz Antenna
Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA)
美零售業力抗關稅「1奇招」 2物仍難逃漲價
在關稅壓力與品牌商品漲價雙重夾擊下，美國零售業紛紛使出「自有品牌」這一奇招，不僅成功拉攏消費者、穩住價格，甚至帶動銷售逆勢成長。然而在全面抗漲的同時，巧克力與咖啡這兩大品類卻仍難逃價格上升命運
根據《Axios》報導，隨著關稅可能導致全國品牌（national brands）價格上漲，自有品牌商品的受歡迎程度也迅速提升。市場研究機構GlobalData董事總經理桑德斯（Neil Saunders）指出，自有品牌的成長速度快於整體零售業，「部分原因是消費者轉向自有品牌能節省開支，這股趨勢已持續一段時間，若關稅進一步推高價格，轉變速度將更快。」
Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA)如今的自有品牌不再是過去的廉價仿冒品。市場研究公司Circana全球執行副總裁暨首席產業顧問懷亞特（Sally Lyons Wyatt）表示，自有品牌已成為許多零售商吸引顧客的「目的性商品」。她指出，自有品牌商品價格平均比全國品牌便宜20%，根據市調機構Numerator的《自有品牌認知報告》，這一價格差距自2019年以來已擴大38%。
文章出自: https://www.chinatimes.com/realtimenews/20250607001444-260408
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.
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