An improved approach to the mutual coupling calculation of conformal array

This paper presents the general expressions of the mutual coupling from waveguide antenna elements on conformal surfaces. Based on direct integration method (DIM) and surface radiation pattern method (SRP), a novel improved surface radiation pattern (ISRP) method is suggested to the calculation of the mutual coupling. The results for the cylinder indicate that ISRP is more accurate than SRP and more efficient than DIM. ISRP is also good at dealing with the mutual coupling of elements with arbitrary polarization, which is helpful to the analysis of conformal arrays on the rotational parabolic which we will do next.