[Revel]

Well if these transmitting towers are going to be highly directional then that really sucks for those who are on the back side. Not only is it not wise to put all brodcasting capacity at one site durring a possible time of emergency, but it also makes it a heck of a lot more attractive terrorist target. Imagine being able to knock out TV to a whole city like Denver from one small point.

[hoosierham]

The viewer will have the directional antenna just like today.but it will be smaller.A smaller antenna has less capture area,so to insure a good picure a high gain version is needed. Higher directionality is one price of higher gain. So all the viewers point their antennas at one tower and do not have to turn their antenna when changing channels.

It is also possible that the best transmitting site could be at the edge of the desired viewers' area,and then directional transmitting antennas are a good answer.

Picture the various patterns a lawn sprinkler may be set to;sometimes you want a wedge,somtimes a circle or half circle. Or a cloverleaf,fat or narrow.