Ask the problem that the active reflection coefficient of array antenna is greater than 1.

Yes, explain, what's going on? The active reflection coefficient can be greater than 1. No, it's greater than 1. What do you mean? For the central unit, if it is a 1000 array unit, each unit is excited separately. Because each element is coupled to the central unit, the total coupling energy may be greater than the input energy of 1 port.