Why doesnt the Time Capsule have external antenna(s)? It is a wireless reouter-right? I am concerned with its Wi Fi range compared to traditional ext. antenna routers. I am thinking of replacing my three-antenna Trendnet TEW-633 router with the Time Capsule 2 TB to control with an Ipad 3 and Airplay to ATV 3 going into an AVR home theater.