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

Figure 7

The (a) 3D structure and (b) current distribution of the proposed elliptic LPF. In the rectangular resonator, the current distribution occurs along the edges of the patch. Also, in the circular resonators, the current distribution is concentrated around the perimeter of the circular structure. The high impedance line ensures that the signal paths remain separate, allowing the LPF to effectively filter out high-frequency components, while allowing low-frequency signals to pass through from input to output.

(a)

(b)