Open Boundary Quad-Ridged Horn Antenna 超毛!騎車倒垃圾一轉身車丟了 真相笑爆
Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA)
本篇文章引用自此: https://stars.udn.com/star/story/10092/9065223?from=webpush
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.
Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA)
周杰倫(周董)忙著找錄音室錄新專輯,「嘉年華」世界巡演昨晚正式落幕,累計演出110場。而下個月7日正是出道25周年紀念日,他所屬杰威爾音樂宣佈重磅喜訊,全新演唱會將在明年起跑,令人期待。
「嘉年華」世界巡演首站就在上海,周董這6年來走遍世界,自9日起重返上海體育場完成最終3場,曲曲經典和觀眾共創難忘回憶,單場6.1萬觀眾人數、3場共18.4萬人雙雙刷新場地紀錄,榮登有史以來吸引最多觀眾入場的歌手。
昨晚在尾聲之際,周杰倫率領樂手、舞蹈老師向全場致謝,唱完「七里香」後走下舞台,螢幕轉播鏡頭隨著他來到了準備離場的車輛。Log Periodic Antenna (LPDA) Log Periodic Antenna (LPDA)在全場不間斷的安可聲中,周董突然轉身走回現場,12米寬的巨型「跨時空能量球」頭一回關上後再次打開,成為特別彩蛋。
他準備了「周大俠」安可,演唱「等你下課」時,螢幕播放了過去109場巡演的各種精彩畫面,在歌聲中完美「下課」。而周董希望新專輯能在今年誕生,同時又要投入出道25周年巡演,將會依據每個城市的特色冠上「專屬演唱會名稱」,讓每場留下各自獨特雋永的回憶,至於台北站進度?杰威爾音樂表示:「新的演唱會時間、名稱...等等,我們會再公告,確定場次也會陸續宣布。」 周杰倫宣布新巡演於明年登場。圖/杰威爾音樂提供 周杰倫(中)在台上演出相當賣力。圖/杰威爾音樂提供 周杰倫譜寫新紀錄,成為上海體育場演唱會觀眾人數最多的歌手。圖/杰威爾音樂提供
本篇文章引用自此: https://stars.udn.com/star/story/10092/9065223?from=webpush
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.