好消息！林昀儒3採陰性 今晚回宜蘭

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

體育中心／蔣季容報導

▲林昀儒第3次採檢呈現陰性。（圖／體育署提供）

好消息！桌球國手林昀儒1日搭乘班機經泰國轉機返國，卻在抵達桃園機場進行落地篩檢驗出陽性；而2日採檢結果呈現陰性，今（3）日進行第3次採檢，同樣是陰性，中華民國桌球協會秘書長葉國欽表示，預計今晚可以回宜蘭居家檢疫。

據《自由時報》報導，林昀儒結束採檢後也感嘆「最近怎麼這麼倒楣！」一採結束後他被送往檢疫所，直言這是他第一次坐救護車，也是算難忘的經驗。