Novel unit cell based on grounded patch for filter applications

Abstract

Metamaterial unit cells based on the square grounded patch are proposed and applied in the microstrip filter design. Influence of geometrical parameters to performances of the unit cell is analyzed. To illustrate the potentials of the proposed unit cells, wide stopband filters of the fourth order at 3GHz are designed. End-coupled resonator is also designed by using the proposed unit cell, whose length is reduced for 69% in respect to the conventional case.