Yes, if all is saved it will reconnect after power on again. Do you have Male antena? What type of antena are you using? I am using this one: NET TP-LINK TL-ANT2405CL 2,4GHz 5dBi RSMA
I bought my antenna off ebay. This is the link to the wireless antenna: http://www.ebay.com.au/itm/281219515495?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649
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The specs. are looking good. FYI I am using my Ant S1 with wifi, distance to AP is around 10meters and there are two walls in between. Still I have average signal on my Ant. May be it`s a problem with antena, if you detach antena completely is it getting worse?