I've already asked about this antenna system, but I still have some questions and some things 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 as \$s(t) = 10\cos(2\pi f_c t)\$.
We also assume that the receiver receives the signal that is reduced to 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\$ ?