Figure 7. Simulation results of intra-channel crosstalk for OAM beams with ℓ = 0, ℓ = +1, and ℓ = +3 as functions of propagation distance z when reflector distance h = 25 cm.

Blue-squared curves: received power of OAM channel ℓ from the direct path in the receiver aperture. Red-circled line: total power collected by the receiver aperture from the reflected path. Black triangle line: received power of OAM channel ℓ from the reflected path. The difference between the black triangle curve and the blue-squared curve denotes the intra-crosstalk level.