Design of a Microwave Quadrature Hybrid Coupler with Harmonic Suppression Using Artificial Neural Networks

Figure 4

Predicted and real values of the output parameters of cut-off frequency, fc (GHz), bandwidth, BW (GHz), suppression factor, SF (dB), and roll-off rate Ro (ζ dB/GHz). In each row of subfigures, the first and second figures are corresponding to the obtained regression from ANN model, where the third and fourth figures representing the predicted output values using ANN model versus number of samplers. The first, second, third, and fourth rows of figures are respectively corresponding to fc (GHz), BW (GHz), SF (dB), and Ro (ζ dB/GHz) output parameters.