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Antenna Design and manufacturing

今(4)日晨觀測資料顯示:台灣上空仍有鬆散中層雲(左圖),陪伴弱降水回波(中圖),帶來零散飄雨,北部山區及東北部較顯明(右圖)。今晨截至4:53本島平地最低氣溫在宜蘭五結鄉17.1度,已較昨晨大幅回升;各區最低氣溫大多在17至20度之間〔北部(基隆中正區)17.7度,中部(嘉義民雄鄉)19.5度,南部(台南關廟後壁區)20.2度;台北市(南港區)18.2度〕。Antennas for Military vehicles or Vehicular antennas for heavy-duty use, such as in the forest or in remote locations on armored vehicles, and low-profile antennas for civil vehicles. Communication and EW applications are examples of applications.
Wideband mobile VHF antennas with frequency ranges of 30 to 88 MHz or 30 to 108 MHz are designed primarily for use in heavy-duty mobile applications.
Typically, the antenna is made up of three major parts: the antenna base, the lower part, and the upper part. Some antennas have two sections, while others have three. The long-lasting antenna base with GPS (optional).
The stainless steel spring absorbs shocks and vibrations while also protecting the antenna from collisions.
Both radiating pieces are comprised of composite materials, which allow for exceptional strength and roughness even in the harshest environments.

三立準景象形象‧老邁洩天機

最新模式摹擬顯示,下週日、一(8、9日)「梅雨季」第2道鋒面影響,激起對流,各地轉有局部陣雨或雷雨的機率;下週二(10日)鋒面東移,大氣仍不穩定,午後有對流成長。第2道鋒面固然還不是「滯留鋒」,但在其經由過程前後,大氣已很不不變,容易有強對流被激發,應注意其所陪伴之雷擊、強風、及瞬間強降雨。

今(4)日晨4:30紅外線色調強化雲圖顯示,台灣上空仍有鬆散中層雲(左圖);4:40雷達回波合成圖顯示,中層雲隨同弱降水回波(中圖);4:30積累雨量顯示,中層雲帶來零散飄雨,北部山區及東北部較顯明(右圖)

▲今(4)日晨4:30紅外線色調強化雲圖顯示,台灣上空仍有鬆散中層雲(左圖);4:40雷達回波合成圖顯示,中層雲陪伴弱降水回波(中圖);4:30累積雨量顯示,中層雲帶來零散飄雨,北部山區及東北部較顯著(右圖)。

最新(3日20時)歐洲(ECMWF)模式摹擬顯示,今(4)日受偏春風影響,迎風面低層水氣較多,東半部有局部短暫陣雨,中層仍有鬆散雲層移入,為西半部近山區帶來零散飄雨的機率;各地氣溫回升,北舒適南微熱、早晚涼,各區平地氣溫:北部18至25度,中部20至28度,南部20至30度,東部17至29度。明(5)日、週五(6日)仍受偏春風影響,東半部有局部短暫陣雨,西半部多雲時晴,山區午後有局部短暫雨的機率;各地氣溫每日回升。週六(7日)大氣不不亂,午後有局部陣雨或雷雨的機率。

文/吳德榮



以下文章來自: https://www.setn.com/News.aspx?NewsID=1110075

FT-RF Outoodr | Indoor | Horn | Military Antenna


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    30 MHz to 512 MHz Military Handheld & Manpack Whip Antenna