Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA)
Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA)
以下內文出自: https://stars.udn.com/star/story/10091/9048213?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.
915MHz Antenna 黃金情侶檔合體威力爆棚 昔日「美國甜心」如今變這樣！
民視「綜藝新時代」阿翔、籃籃、楊繡惠與來賓安妮日前到布袋錄影，一行人坐在北堤旁垂釣，安妮天真提問：「我們是在釣蚵嗎？」籃籃馬上糾正：「蚵不是用釣的是用『笑』的啦～呵呵！」超冷笑話瞬間冷空氣凝結。就在閒聊間，籃籃的魚竿有了動靜，奮力拉起魚竿釣起的竟然是阿翔，開場笑料不斷。
第一站，阿翔帶領大家挑戰布袋第一高峰，當大家走進活動中心卻找不到阿翔，沒想到他已經全身穿好登山裝備走出，告訴大家怎麼可以要爬山卻所有裝備都沒有？絕對不能小看大山的威力，不僅裝備要穿好還需要先做熱身。熱身完畢，眾人正式登山努力攀爬，終於氣喘吁吁的抵達第一個休息平台，休息一下並補充體力後繼續朝山頂邁進，當大家一同抵達高峰時，所有人都興奮唱起「We are the Champions」。
安妮激動感謝她的爸爸媽媽、高中老師，楊繡惠更表示自己感到呼吸困難，肯定是因為空氣過於稀薄，但當籃籃信心滿滿猜測海拔「1100公尺」時，真相竟只有「11公尺」，眾人瞬間傻眼，阿翔不滿：「你們好像很看不起這座高山誒！」楊繡惠馬上吐槽：「這座叫高山？」阿翔馬上補充：「大家現在所在的高山可是比玉山還要厲害」，前東港山雖是全台「最矮高峰」，卻同樣擁有一等三角點，還比玉山多了一等天文點。最後阿翔挑戰從山腳到山頂只花12.5秒，邀請觀眾一起來破紀錄。
以下內文出自: https://stars.udn.com/star/story/10091/9048213?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.
915MHz Antenna 黃金情侶檔合體威力爆棚 昔日「美國甜心」如今變這樣！