The performance of planar slotted waveguide arrays with distortion was investigated in this paper. Errors in array element (radiating slot) positions as a result of structural deformation are considered as predictable. Practically discrete points on the plane containing the radiating slots were measured with the help of API measurement system. But these points are too few to determine the radiation slot positions by the methods of interpolation or fitting accurately. So the finite element method was used to settle out the radiation slot positions with ANSYS according to the given points. The slot voltages were obtained from finite element solution or antenna measurement system in an anechoic chamber and assumed to be unchangeable for the distortional antenna used in the calculation of far-field pattern. The pattern for distortion and undistortion antenna was obtained by an analytical formula. Finally, measurements were found to be in a good agreement with the calculation results.
展开▼
