To provide a method and a device for optimizing a dielectric circuit board material for increasing the degree of freedom in the design of an RF circuit and improving performance in a single-port resonance line.

A printed circuit for processing a radio frequency signal includes a substrate. The substrate is a meta material and includes at least one dielectric layer 100. The dielectric layer 100 has first and second dielectric characteristics in first and second regions 112 and 114, respectively. The permittivity and/or permeability of the second dielectric characteristics differ from those of the first dielectric characteristics. The printed circuit includes the resonance line 102 of the single port and a ground surface 116 connected to the substrate. The electric characteristics perform control so that the dimensions of the resonance line 102 are adjusted. The dielectric characteristics perform control further so that the impedance, the degree of sharpness, and/or capacitance of the resonance line 102 are adjusted. The resonance characteristics of the resonance line 102 are distributed via the substrate.