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　　據(jù)美國科技博客Gizmodo報道，F(xiàn)acebook的無人機無線網(wǎng)絡(luò)已經(jīng)不是什么新鮮的概念了，現(xiàn)在美軍計劃建立自己的無人機WiFi網(wǎng)絡(luò)。從伊拉克戰(zhàn)場上退役下來的無人機可以從倉庫里拿出來，用于美國國防先進研究項目局（DARPA）的“移動熱點”計劃了。

　　在偏遠而又需要通訊的地方，有自己的WiFi無人機在天上飛來飛去很不一樣。DARPA已經(jīng)改造過的RA-7無人機比起殺人無數(shù)的捕食者無人機要小巧許多。實際上，這款無人機只有3.4米長、84公斤重，因此還不能搭載太重的網(wǎng)絡(luò)設(shè)備。“戰(zhàn)爭很無聊”網(wǎng)站解釋說：

　　竅門是把網(wǎng)絡(luò)設(shè)備裝在無人機的上部。DARPA研究人員說他們開發(fā)了一種毫米波頻段（這是很高的頻段）的小型天線，以及特殊的放大器來增強信號，而運行時的噪音只有常規(guī)放大器的一半。

　　集成了所有元件的設(shè)備重量約為9公斤，無人機則可以一次飛行9個小時�，F(xiàn)在就輪到DARPA去組裝設(shè)備，并且確保發(fā)射WiFi的無人機可以在戰(zhàn)場上良好運行了。未來，所有無人機武器可能都會配備WiFi設(shè)備。

　　譯者：林杉

　　百度新聞與新華網(wǎng)國際頻道合作稿件，轉(zhuǎn)載請注明出處。

　　The Military Wants to Turn Its Drones into Flying Wi-Fi Hotspots

　　Not to be outdone by Facebook's vision of a drone internet, the military is whipping up unmanned aerial Wi-Fi hotspots of its own. Unused drones from the war in Iraq are getting a second life as part of DARPA's Mobile Hotspots program.

　　In remote areas where communication is critical, having your very own Wi-Fi drone circling overhead makes a big difference. The RA-7 Shadow drones DARPA has been retrofitting are much smaller than the deadlier and more infamous Predator drones. In fact, at just 11 feet long and 185 pounds, you have to be careful not to overload them with heavy internet equipment. War is Boring explains the details:

　　The trick, of course, is to fit the wireless equipment on the drone. DARPA researchers say they have developed small antennas operating on the millimeter wave band—that's extremely high frequency—as well as special amplifiers that can boost the signal while generating just half as much noise as regular amplifiers.

　　The pod with all this equipment comes out to about 20 pounds, and the drone itself can fly for nine hours at a time. Now it's up to DARPA to put it all together and make sure a Wi-Fi equipped drone actually works for troops on the ground. In the future, even drone armies could be Wi-Fi equipped. [War is Boring]