I've already asked about this antenna system. However, I still have some questions and somethings I do not understand.
I heard that the antenna only receives POWER, not voltage. From this fact, I thought that the current will be 1 / (antenna resistance + load resistance). That is, the input power is constant.
Let us define the transmit signal with power 50 Watt is $$s(t) = 10\cos(2\pi f_c t).$$ And we assume that the receiver receives the signal that is reduced a half of the transmit signal, i.e., the power of the received signal is 25 Watt.
Then, is the voltage source defined as $$ v(t)=A \cos(2\pi f_c t) $$ such that $$\frac{\frac1T\int_T |v(t)|^2 dt}{R_{antenna}+R_{load}}=25$$ ?