Dual-Mode Patch Filter with Metal Wall Structures

Abstract EN

A dual-mode patch filter with metal wall structures is presented.

The proposed structure consists of substrate 1 with metal wall structures and substrate 2 with a patch resonator.

Because the symmetry of the structure can be perturbed by both long and short strips of the metal wall structures, the dual mode is achieved.

The inductive element is introduced to the patch resonator through vias of the metal wall structures.

The capacitive element is introduced through a gap between the patch resonator and the metal strips.

The measured 3 dB fractional bandwidth for the passband is 10.4%, and the measured minimum insertion loss is 1.3 dB.