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actually,i just want to know,whether 2.8 ghz and 4.8 ghz are also including in the range WLAN frequecies.For your information im designing patch antenna with range frequency from 2ghz until 6ghz.As i know that the range frequency are use for wlan application.The problems are my design antenna just have better return loss for that frequencies which are 2.8 and 4.8 ghz.So i want to know what is exactly application for this frequency.