全台停電!瑞芳大街冒白煙 羅東民宅火災

全台大停電，各地陸續傳出災情。早上10點多，瑞芳大街上突然竄出白煙，疑似發生火警，警消到場查看，發現是社區內的發電機在作祟，好在沒有釀成意外。不過在同一時間，宜蘭羅東一處民宅真的發生火災，消防人員一到現場，一樓已經全部燒得焦黑，立刻將受困男子平安救出。

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