Abstract:

In this paper, a new expression for diffraction by a two-dimension wedge which is convenient for computer calculation is presented. The calculation of the diffracted field by edge and E-plane patterns of slot array in a rectangular waveguide is analyzed. The singularity which appears in calculation and usable treating method are discussed. The result indicates that if the integral path is suitable end Gauss's method,which can be used to calculate some integrals with singular points in integrated functions, is used,the singularity can be settled satisfactorily. The formulae in the nresent paper are suitable widely, with them near zone field can be calculated as well as far zone field, and they are suitable for single slot and slot array. Two different longitudinal slot array's E-plane patterns of a standard X-band rectangular waveguide are calculated. The results of calculation are in good agreement with those from measurement.

Key words: wedge diffraction, slot array pattern, rectangular waveguide, singularity