Calculation of Coupling Coefficients for Arrays With Skewed Lattices From Infinite Array Scan Reflection Data

Calculation of array antenna mutual coupling coefficients may be accomplished using a Fourier transform of scan reflection coefficient data from an infinite array code provided that the limits of integration are defined appropriately. In most cases the limits extend outside visible space, imposing a requirement on the infinite array code that the boundary conditions be formulated in terms of u, v instead of thetas, phi. Further, when the array lattice is skewed, an additional change of variable is needed to form a rectangular integration region. This paper describes the method needed for mutual coupling coefficient calculation, and gives examples showing its versatility and accuracy.