Resonance of the Rectangular Microstrip Antennaa on the Uniaxial Substrate with an Airgap

초록

The resonance characteristic of microstrip antenna with an airgap between the substrate layer and ground plane is investigated. The study is performed by using a rigorous Green's function formulation in the spectral domain and Galerkin's moment method calculation. The numerical convergence using sinusoidal basis function, the unknown surface current distribution in the rectangular patch, is discussed. Numerical result for the effects of airgap and patch length on the complex resonant frequencies of the rectangular microstrip structure are also presented.