Finite array analysis and prediction of blind spots

The work described here has provided a successful analysis for the input impedance of different slots in a finite phased array. The mechanism which gives rise to coupling accumulation, causing "blind spots" at scan angles within the scan range has been disclosed. New means for avoiding such effects are introduced. This analysis is based upon the integral equation formulation of the boundary value problem. The solution of the integral equation is approximated by a solution of a truncated set of linear equations. To this end, the set of internal TE and TM waveguide modes was used as a basis for field representation inside the radiating slots.