Evaluation of the Efficiency of the Metamaterial in the Development of Microstrip patch Antennas using LTCC Technology

The paper describes the results of the study and modeling of the characteristics of the metamaterial made of square open-loop ring resonators (SRR - split ring resonator), the SRR with a single ring and SR resonators based on the obtained results. Numerical results have shown that higher miniaturization is achieved using a spiral resonator SR, compared to the cases of SRR with double rings and SRR with one ring. A study in the range of 9.15 GHz to 5.25 GHz of the influence on the characteristics of the metamaterial of SR spiral resonators from the number of turns (from 1 to 5) at fixed other sizes of the resonator. It is shown that the increase in the number of turns leads to a shift of the operating frequency band towards lower frequency values, but the operating band is reduced. The paper presents the computation through the coefficients of transmission and reflection of the effective values of the dielectric εeff and magnetic permeability μeff layer of metamaterial based on the spiral resonator SR. A microstrip antenna on a substrate of SR-metamaterial is considered. It is shown that this modification of the antenna and the use of LTCC technology can decrease the geometric dimensions of the patch, increase radiation efficiency and extend the operating frequency band. Numerical studies were carried out using specialized software for electrodynamic design, such as HFSS and FEKO.