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February 2012 Vol. 3, No. 1

When military radar causes fixed broadband wireless interference

We established a RF link (using an Infinet router) to connect two locations about 40 KM apart with fixed broadband wireless. It was working fine for 2 weeks and suddenly it started going out for 2 to 3 hours and coming back on automatically. The ISP is telling us this is due to military radar operating in that area. If it is due to a radar issue what are the possible solutions? Do you have a question for our experts? Submit your question directly to our editors at editor@searchnetworking.com It is quite possible that your ISP has landed on the root cause of your problem.  Military radar and commercial Wi-Fi systems have been known to cause co-interference with each other, as the military C-band occupies frequencies in the range of 5290 to 5925 MHz, overlapping with the IEEE 802.11a wireless local area network standard allocations of 5150 to 5725 MHz. Likewise, the Military E, F, and G Bands occupy frequencies from 2 to 6 GHz, which overlap with the radio frequencies allocated to many Fixed Broadband Wireless Access (FBWA) ...

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