I have a question related to 802.11n wi-fi antenna. What actually do we mean by 1T1R mode for Wi-Fi?

As per wiki, the same channel is used for Tx &amp; Rx:
http://en.wikipedia.org/wiki/MIMO
http://voyager8.blogspot.in/2011/09/wireless-antenna-technology-siso-simo.html   

In 1T1R  mode, do we need a separate antenna for both transmission and reception?


Question: Mark: outstanding (as in: not yet known)
Answer: To be received, or to be decided?

This fits into a pattern of common phrases: to be confirmed, to be announced, to be decided, which are standard enough that in many institutions they are given just as tbc, tba, tbd.  To be received is less standard than these, but should be well-understood since it clearly invokes this well-known template.