Most N routers can do both G and N protocols. BUT if you set it to only use N, then you can't use 1395.  It is that simple.
  I have a DELL Inspiron 1564 with the 1395 WLAN mini card. With my 1395 I see 30 wifi connections but I don't see the connection that I need to(my router). Using a airlive usb adapter I see fewer connections but I see my router too and it works just fine. So I don't know what can I do to use my wi-fi router  without usb adapter. I've changed antenna mode from auto to aux but without any help.  The router is a Freebox F-ADSL05C   with  802.11n protocol In fact I think that's the problem. The protocol. Because 1395 doesn't support 802.11n. Is there any solution?  Tks..
WLAN 1395 vs 802.11n protocol