Log Periodic Antenna

記者蔡厚瑄／綜合報導

▲富邦悍將洋砲霸帝士。（資料圖／記者劉彥池攝影）

富邦悍將24日在主場迎戰味全龍，3局上一壘手林益全就先發生失誤，讓味全串聯攻勢拿下第1分，沒想到4局上，左外野手霸帝士在面對李凱威擊出的平凡飛球，竟又發生超離譜的接球失誤，讓全場都傻眼。

3局上味全首名打者張祐銘敲出內野滾地球，一壘手林益全在接球時發生失誤，隨後味全靠著捕逸拿下破蛋分，雖然悍將下個半局馬上靠著3安串聯打回2分超前，未料4局上2出局後，李凱威面對悍將洋投威迪茲，敲出一顆左外野飛球，悍將左外野手霸帝士早早就站定位，手套擺著只等球掉下來，沒想到球撞到手套就這樣彈了出去，李凱威見狀直奔二壘，下棒拿莫．伊漾又補上長打幫助球隊追平，這次離譜的接球失誤又讓球隊付出代價。

▲悍將洋砲霸帝士4下出現超離譜接球失誤。（影片來源：CPBL TV）

而悲情的威迪茲最後6.1局被敲11安，失7分有3分是非責失，退場時悍將以3：7落後，暫列敗投候選人。

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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