Analysis of mutual coupling of superstrate-loaded cylindrical-rectangular microstrip antennas

The mutual coupling between microstrip antenna elements affects the performance of microstrip arrays. Substrate cover or superstrate-loaded on microstrip arrays is necessary to prevent the damage of nature or man-made. The effect of substrate cover should be considered when conformal microstrip antenna and arrays are designed. The analysis and computation of mutual coupling of superstrate-loaded cylindrical-rectangular microstrip antennas fed by coaxial probe was proposed by using rigorous full-wave method. The calculation results about mutual coupling of E-plane and H-plane were given. The variations of the mutual coupling with curvature of cylinder and the spacing between microstrip elements and frequency were discussed. The coupling with different grounded dielectric substrate and superstrate was analyzed.