Scattering characteristics of complex inductive discontinuities in three-layer planar structures

The scattering characteristics of complex inductive discontinuities in three-layer planar structures in the form of a narrow segment of finite length microstrip transmission line and H-shaped gap resonator, symmetrically located in the grounding layer are considered and compared. It was shown that such structures have spectrum of multifrequency resonance interaction with the basic transmission line. For inductive segments smaller than λ/16 using optimization procedures wideband band-pass and band-stop filters characteristics in the microwave frequency band have received.