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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.
In terms of its specification, a typical log periodic antenna might provide between 3 and 6 dB gain over dipole for a bandwidth of 2:1 while retaining a VSWR level of better than 1.3:1. 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.
EMC/EMI pre-compliance test antenna.
Very high gain over the full frequency range.
Meets latest EMC standards up to 7GHz.
Suitable even for immunity measurements
「咒」全台熱賣1億7千餘萬,金馬典禮上還特別安排主持人謝盈萱模仿片中的蔡亘晏,問她感覺如何?她答道:「有7、8分像,可是眉毛太濃了。」金馬入圍13項,「咒」抱回最佳剪輯、最佳音效雙獎,得到剪輯獎的正是柯孟融自己。他表示其實不覺得能得獎,朋友也要他得失心別太重,他都幫大家打氣,也順便打預防針,雖然沒拿到的獎都有點可惜,卻並沒失望,得到剪輯剪依舊很開心。
過去隨劇組參加過兩次金馬頒獎的高英軒,今年首度因自己提名最佳男配角而出席,非常開心。聽到柯孟融保證還會再找他們拍戲,蔡亘晏與高英軒立刻提議:「片酬可以再高喔。」柯孟融的回答卻令他們哭笑不得:「本來就不高,漲一點也還可以。」 榮獲最佳剪輯和音效雙獎的「咒」舉行慶功宴。圖/牽猴子提供 「咒」導演柯孟融(中)端出蛋糕為女主角慶生。圖/牽猴子提供
文章出自: https://stars.udn.com/star/story/10090/6778572?from=udn-catelistnews_ch1022
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