said by mozerd: said by signalfishin:
These questions are about load-balancing multiple WiFi connections with N-based wifi routers running DDWRT.
THE GOAL: is to increase throughput by concatenating the bandwidth of the external links.
(3) [related to question above] Can only two antennas on a N-router pick up more than two signals simultaneously? If not, is there a way to add more antennas to the router's radios?
Specific to your question (3) perhaps the following article can help to answer your question.802.11n 802.11a/g Multipath the Site Survey and Beamforming
Understanding HOW 'N' works is important -- there are many  N implementations out there -- non are equal so very little compatability exists between N gear REGARDLESS of the IEEE ratified standards for "N".
The first declaration of scope would suggest this is a networking topic, not a wireless one. #3 however, muddies that.
Notwithstanding the compatibility issues WRT N gear, I have to wonder how all those radios will share the limited spectrum.--
Strange as it seems, no amount of learning can cure stupidity, and formal education positively fortifies it. -- Stephen Vizinczey