coefficients u03b1 and u03b2 described in fig5 this ratio of coefficients is sufficient to allow for the phasing of the two lattices together this process is comparable to determination of the ratio of coupling coefficients along a line array described previously a mutually coupled signal s is comprised of three complex valued components the first step is to measure the four signals s 1 s 2 s 3 and s 4 equ6 next the ratios of the signals s 1 s 2 and s 4 s 3 are formed equ7 finally the ratio of the ratios is formed to calculate the ratio of the coupling coefficients equ8 the ratio z is the desired coupling coefficient ratio using the same notation for elements and coupling paths the following signals are collected equ9 the amount that element 3 must be adjusted to equal element 2 in a complex sense is equal to the ratio of s 2 u00b7 z and s 1 equ10 applying this correction plus the correction for the difference in coupling paths it will be seen that the signals below are equal calibration into interleaved lattices the technique described herein applies to general parallelogram lattices square rhombic rectangular and parallelogram lattices are just cases of a general parallelogram for explanation purposes and without loss of generality a parallelogram.