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A novel design method of microstrip patch antenna with photonic crystal substrate is proposed and analyzed. The method is different from the traditional one. Early work uses natural materials as the substrate to design microstrip patch antenna. In the work, dielectric cylinder arrays are designed based on periodic waveguide theory to realize the substrates with controllable dielectric constants. Meanwhile, applying dielectric cylinder array and microstrip antenna design theory, we designed and simulated a new type of antenna. The proposed antenna model is compared with homogeneous substrate structure antenna-based microstrip patch antenna and analyzed the radiation characteristics. The consistency of results shows that this method is feasible for antenna design. Afterwards, we fabricated a novel antenna with an equivalent dielectric constant of 2.94, which is further verify the feasibility of the method. Finally, the performance of designed antenna is analyzed with different cylinder height. The results show that the novel antenna design method maybe possess great significance to the design of high-gain miniaturized antenna.

Utilizing photonic crystal structure to design microstrip antenna with controllable dielectric constant substrate