Log Periodic Antenna

體育中心／唐嘉佑報導

▲麥考倫（CJ McCollum）簽約前1天去NFL球隊克里夫蘭布朗隊的主場看球，還遇到騎士球迷向他喊話，希望他能加盟騎士隊。（圖／翻攝自麥考倫推特）

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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

鵜鶘球星麥考倫（CJ McCollum）9月25日和球隊完成續約，6400萬美金，相當於台幣20億延長2年合約，意味著麥考倫跟鵜鶘的合約現在總值4年1億3300萬美金，相當於台幣42億元，但在簽約消息傳出的前1天，麥考倫在NFL球隊克里夫蘭布朗隊的主場看球，還被騎士球迷告白喊話：「快來騎士！」只見麥考倫當下低著頭快步經過，似乎不敢應付這尷尬的場面。

麥考倫在上個賽季被拓荒者交易至鵜鶘隊，當時他身上還有2年合約，最終為鵜鶘出賽26場比賽，繳出場均24.3分、5.8助攻的優異成績，也成為帶領鵜鶘闖進季後賽的關鍵人物，因此休賽季鵜鶘也展現誠意和麥考倫續約，續約後麥考倫現在跟鵜鶘的合約價值4年1億3300萬美金。

但在24日時發生尷尬一幕，當時麥考倫和友人在NFL球隊克里夫蘭布朗隊的主場看球，現場當然會有許多克里夫蘭騎士隊的球迷，因此當他們看到麥考倫後，也興奮地向他喊到：「快來騎士吧麥考倫！」不過顯然當時麥考倫已經知道自己即將和鵜鶘續約的消息，因此沒有多做回應，只是低下頭快速走開。