What is the value of polarisation loss factor (PLF) when the transmitter antenna is in X-axis, and the receiver antenna is along with Y-axis?

The polarization loss factor (PLF) is a measure of the loss in power density that occurs when the polarization of the transmitted wave does not match the polarization of the receiving antenna.

When the transmitter antenna is in the X-axis and the receiver antenna is along the Y-axis, the antennas are orthogonally polarized. In this case, the polarization loss factor (PLF) is maximum, which means the signal power that can be received is zero. This is because the electric field of the transmitted wave is perpendicular to the receiving antenna, and thus, the antenna cannot pick up any of the signal.

So, the value of the polarization loss factor (PLF) in this case is infinity (or in dB, it is undefined because log(infinity) is undefined).