H-plane sectoral horn antenna

（中央社記者黃國芳嘉義市18日電）嘉義市某高中今天午休時間發生1年級男學生不明原因墜樓，救護人員到場時學生呈現OHCA（到院前心肺功能停止）狀態，立即送醫急救後仍宣告不治。原因待釐清。

嘉義市消防局下午1時1分左右接受某高中報案，指這名男學生午休時間高處墜樓，救護人員趕抵時，發現學生呈現OHCA（到院前心肺功能停止）狀態，立即送醫急救。

嘉義市聖馬爾定醫院表示，男學生到院時全身多重鈍傷及穿刺傷，經急救後仍宣告不治。校方指出，學生墜樓原因，還在進一步了解中。（編輯：孫承武）1110218

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