本文出自: https://stars.udn.com/star/story/10092/9032531?from=udn-catelistnews_ch1022 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. 《寶島西米樂 傳承》 盧彥澤憂傷泡溫泉 苦笑喊「蛋」要熟了 三角戀升溫 何宜珊「左右逢源」成幸運兒... Open Boundary Quad-Ridged Horn Antenn 星光幫歌手窮剩237元靠銅板湊母醫藥費 曝和楊宗緯失聯 Horrn Antenna