I've been battling with
intermittent signal problems in my house for some time. My have an
Apple Time Capsule base station, which supports dual band 802.11
g/n on 2.4Ghz and 5Ghz bands. And my iPad and Macbook Air both
support 802.11n on both bands. My iPhone only supports the 2.4Ghz
band, as I recently discovered.
At the other end of the house, opposite the base station, is my
bedroom, where the WiFi issues occur. Initially, I added a WiFi
extender, in the form of an Apple Airport Express. I've tried two
models, and both gave me great signal strength, but the
connectivity would intermittently stop (as it did without the
extender), sometimes requiring a restart of the extender. I
eventually got rid of the extender, and decided to research a
different solution.