By introducing coordinate transformation into geometrical theory of diffraction (GTD), the problem of calculation the power coupling between the correspondingly skew paraboloid antennas is considered. The skew configuration means there is an angle between the axes of two antennas. It is illustrated by considering the coupling between two identical front-fed symmetric paraboloid antennas, each of which is fed by a TE11 mode circular waveguide. The result can be used as guidance for the installation disposition of multiple antennas.
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