Hi group, I have a question regarding to detect the location of the antenna. I read this link: https://en.wikipedia.org/wiki/Plane_wave In the "Complex exponential form" part, the equation: U(r,t) = U0 * exp(j*(k.r - w*t) as the function of location and time U0 = A0 * exp(j*phi) : A0 and phi are amplitude and phase respectively. From U0, I can write down a complex number x and y (still in time domain) x and y should be vector on the complex coordinate. Now, I need to define value of amplitude and phase base on value of x and y. But I do not know x and y. When I rotate the antenna, can I define the position, amplitude and phase? I hope any one can give me suggestions. Thank you.