Analysis of error induced by the two parallel dipole probes in the near field of the open ended waveguide

The Method of Moment (MoM) approach is applied to estimate the error induced by two parallel dipoles used as probe on the plane of open-ended waveguide aperture. Reflection coefficient of feed waveguide is calculated by using coefficients of the basis function obtained from Method of Moment (MoM) analysis. Using the existing field at the waveguide aperture, the radiated fields at the two dipoles are evaluated using plane wave spectrum approach. At the different locations of the radiator's near field, the error induced by received voltage on the probe is evaluated.