In fact this is the example from Antenna Theory by Balanis 3rd edition p78 to 79. I don't agree with the book. It uses spherical coordinates and I
disagree with the assertion that the antenna transmitting from a distance from the origin towards the origin is \[ \frac{\hat{\theta} +j\hat{\phi}}{\sqrt{2}\].
Also for RHC antenna in tx mode using as receiving antenna at the origin, I agree with the given equation. But that would give total loss in reception!!! I am confused, please help.
Thanks