THE EFFECT OF THE INCLUSION OF HIGHER-ORDER INTERNAL COUPLING ON WAVE-GUIDE SLOT ARRAY PERFORMANCE

It is known that the inclusion of higher order internal coupling effec ts in the design of waveguide slot arrays may result in machinable dif ferences in slot offsets and discernible deviations in slot lengths, e specially for reduced-height waveguides. However, the impact of these physical differences on the frequency-dependent array performance has never been quantified. The existing analysis technique for slot arrays does not make provision for the effects of higher internal coupling. In this paper, the analysis procedure is amended to include this effec t. This facilitates an investigation into the variation in frequency p erformance for arrays designed by either neglecting or including highe r order internal coupling. For the specific example treated in this pa per, the variations were minimal. (C) 1998 John Wiley & Sons, Inc.