Jammer Antenna For Vehicles (MJ-Series)

The LoRa 915MHz antenna is an omnidirectional outdoor antenna that operates in the 902 to 928MHz ISM band and has a core frequency of 915MHz. The antenna is intended for use in industrial and environmental monitoring, mesh network applications, and LoRa and LPWA networks, among other things. This series omnidirectional antenna radiates consistently in the azimuth from 3 to 9dBi gain. This collinear design feature gives the highest performance, providing better coverage and hence longer range in the horizontal plane over 360 degrees, reducing the number of mesh nodes required. Because of the UV protection, this design is extremely robust and can be used in any weather condition, even in a tough environment. Lora 915Mhz antennas are simple to use and may be immediately connected to access points. One pair of packing contains a U-bolt and waterproof tape, allowing the antenna to be mounted on a wall or pole depending on the situation.

FT-RF

文／吳德榮

三立準氣象‧老大洩天機

昨（19）日各地區最高溫：北部（新北五股區）31.0度，中部（嘉義大埔鄉）32.7度，南部（高雄杉林區）33.2度，東部（台東鹿野鄉）30.9度。今晨迎風面低雲增多（左圖），北海岸及東側海面有降水回波消長（右圖），東半部有零星降雨；截至4:53各地區平地最低氣溫大多在19、20度，北部（桃園大溪區）19.1度，中部（南投中寮）19.1度，南部（高雄田寮區）20.0度，東部（花蓮壽豐鄉）19.9度。

19日20時歐洲模式（ECMWF）模擬顯示，今、明兩天微弱東北風影響，北海岸、東半部有局部雨，大台北東側亦有局部短暫雨；西半部仍為晴時多雲的天氣，中南部清晨易有局部霧，南部空品仍不佳，應注意。北台稍轉涼，其他地區氣溫無明顯變化。各地氣溫：北部19至26度，中部19至32度，南部20至33，東部20至29度。週二東北風減弱，白天為空檔，各地氣溫升；晚起水氣漸增、天氣漸轉變。

最新模式模擬顯示，週三起至週五鋒面南下併南方水氣，影響範圍大，並有較大雨勢；中部以北有局部雨，南部亦偶有局部降雨的機率；但各地降雨的時空分布，歐、美（GFS）模式模擬並不完全一致，顯示有「不確定性」，應持續觀察。週六受東北季風影響，迎風偶雨、背風晴，氣溫略升。

▲左圖：20日4:20紅外線衛星雲圖顯示，迎風面低雲增多。右圖：雷達回波合成圖顯示，北海岸及東側海面有降水回波消長。