H-plane sectoral horn antenna

體育中心／賴禹蓉報導

▲斯威雅蒂（Iga Swiatek）再闖WTA女單決賽。（圖／翻攝自WTA推特）

新科網球世界球后斯威雅蒂（Iga Swiatek）本季在WTA巡迴賽表現超狂，今年已經豪取3座WTA1000分等級的大賽冠軍，23日又在斯圖加特保時捷網球大獎賽力退俄羅斯選手Ludmilla Samsonova闖進決賽，打出一波22連勝，冠軍賽將對決白俄羅斯好手莎芭蓮卡（Aryna Sabalenka），再問鼎一座女單金盃。

斯威雅蒂今年在邁阿密網球公開賽封后，成為史上第4位同時也是最年輕的「陽光雙冠」得主，順利問鼎女單世界球后寶座，轉戰到了紅土賽事，斯威雅蒂手感依舊火燙，本次在斯圖加特位列頭號種子，首輪輪空，接下來的兩場比賽都是直落2力退對手，4強賽面對Ludmilla Samsonova，首盤雙方就激戰到搶七決勝局，最後斯威雅蒂搶七失利以6：7（4：7）讓出第一盤。

比賽進入第二盤，斯威雅蒂率先破發，以6：4搶下次盤，將比賽逼進到了決勝盤，斯威雅蒂在決勝盤遭遇亂流，一度以4：5落後對手，不過她很快穩住陣腳，接下來連贏3局，最終以7：5擊敗Ludmilla Samsonova，闖進斯圖加特公開賽決賽。

斯威雅蒂近期打出一波22連勝，扣除此役前13場都是直落2贏球，狀態極佳，冠軍賽她將對決同樣近況火燙的白俄羅斯好手莎芭蓮卡（Aryna Sabalenka），這將是她生涯第8度挺進WTA女單決賽，不只是要尋求23連勝，更要力拚個人本季第4冠，同時也要締造巡迴賽單打決賽7連勝紀錄。

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